tag:blogger.com,1999:blog-13883234363451034032024-02-20T09:14:06.876-08:00NanoGuruNanotechnology blog with basics, news, and events information.Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.comBlogger51125tag:blogger.com,1999:blog-1388323436345103403.post-32077548890075833992010-02-01T04:19:00.001-08:002010-02-01T04:19:47.978-08:00NANOTECHNOLOGY EVENTS 2010<p><strong><u>ALL OVER THE WORLD</u></strong></p> <ol> <li>2010 International  Conference on Nanotechnology, Optoelectronics and Photonics Technologies (NOPT 2010) <strong>Singapore</strong>, Feb. 26-28, 2010.The Conference will be held in Suntec Singapore International Convention & Exhibition Centre.       Site:- <a title="http://www.iacsit.org/nopt/" href="http://www.iacsit.org/nopt/">http://www.iacsit.org/nopt/</a></li> </ol> <p>   2.  Nanotech 2010 (13th annual) will take place at the Anaheim Convention Center, <strong>Anaheim, California</strong>, June 21-25.  Abstracts Due: <strong>March 19st (posters only) . </strong>Site:-<a title="http://www.techconnectworld.com/Nanotech2010/" href="http://www.techconnectworld.com/Nanotech2010/">http://www.techconnectworld.com/Nanotech2010/</a></p> <p> 3. 2nd ISESCO International Workshop and Conference on Nanotechnology (IWCN 2010). Kuala Lumpur, Malaysia. January 25 - 27, 2010</p> <p>4.Nano 4 Life 2010 - Converging Nanotechnology with the Life Science Industry. London, UK. February 04, 2010.</p> <p>5.Nano tech 2010 International Nanotechnology Exhibition & Conference. Tokyo Big Sight, Japan.February 17 - 19, 2010.</p> <p>6. 2010 International Conference on Nanotechnology, Optoelectronics and Photonics Technologies (NOPT 2010). Singapore.February 26 - 28, 2010.</p> <p>7. 3rd NanoCharM (Winter) School on Ellipsometry - Fundamentals and Applications in Nanoscience and Nanotechnology. Bad Hofgastein, Austria.February 27 - March 05, 2010.</p> <p>8.International Conference on Nanotechnology, Optoelectronics and Photonics (ICNOP 2010). Rome, Italy.April 28 - 30, 2010.</p> <p>9. First International Conference in North America on Nanotechnology in Cement and Concrete. Irvine, CA.May 05 - 07, 2010.</p> <p>10.US-EU-Africa-Asia-Pacific and Caribbean Nanotechnology Initiative (USEACANI) Workshop. TBA. June 20 - 25, 2010.</p> <p>11.International Conference on Nanotechnology: Fundamentals and Applications. Ottawa, Canada.August 04 - 06, 2010</p> <p>12. Third Nanotechnology International Forum - Rusnanotech 2010. Moscow, Russia.November 01 - 03, 2010.</p> <p> </p> <p><strong><u>INDIA</u></strong></p> <p> 1. International Conference on Nanoscience and Nanotechnology (ICONN 2010).Organiser:  <strong>SRM University,Chennai</strong>,India. <strong>February 24-26, 2010</strong> </p> <p>2.International Conference On Nanotechnology and Biosensors (ICNB-2010). Visakhapatnam, India. January 20 - 21, 2010</p> <p>3.Conference on Micro/Nano Devices, Structures and Systems - MiNDSS 2010. Tamilnadu, India. January 22 - 23, 2010</p> <p>4. National Conference on Nanomaterials and Nanotechnology (NCNN'10). Nagpur, India.January 18 - 20, 2010.</p> <p> </p> <p><strong><u>Further Reference</u></strong></p> <ul> <li> <a href="http://www.nanotech-now.com/events-2010.htm" target="_blank">Nanotech-now events</a></li> <li><a href="http://www.azonano.com/events/events.asp" target="_blank">Azonano events</a></li> <li><a href="http://www.nanoconferences.com/" target="_blank">Nanoconferences</a></li> </ul> Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com55tag:blogger.com,1999:blog-1388323436345103403.post-81291794384481537162009-11-25T01:52:00.001-08:002009-11-25T01:52:16.599-08:00Create PDFs and ebooks from Wikipedia<div xmlns='http://www.w3.org/1999/xhtml'><p>Do you want to create a PDF ebook from wikipedia or want to download your favorite wikipedia page as a PDF file.Now wikipedia itself provides a solution for it.Wikipedia's <strong>new beta design</strong> helps you to do this<strong>.Click Try beta design</strong> on the top link and<strong> log on to</strong> wikipedia using your<strong> username and password</strong>,if you have one,else register for one.</p><br/><br/><p>Any article can be downloaded or printed as a PDF, and multiple articles can be combined into a PDF book.In the left-hand sidebar, under "<strong>Toolbox</strong>," in <strong>print/export</strong> menu you'll find a "PDF version" link that uses Wikipedia's servers to generate a highly printable PDF of any Wikipedia article, no third-party tools needed.The "Create a Book" tools, which lets you add pages in real time as you explore through Wikipedia's knowledge bases. Click<strong> "Show Book</strong>," and you can re-order your pages, give your book a title and subtitle, and save it to your account for online reference or download a PDF for printing. </p><br/><br/><p> <a href='$Wikipedia[2].png'><img height='218' border='0' width='163' src='http://coolefriend.com/wp-content/holder/2009/11/Wikipedia_thumb.png' alt='Wikipedia' title='Wikipedia' style='border-width: 0px; display: inline;'/></a> </p><br/><br/><p>Here is the screenshot of how I did it,follow the guidelines to build an ebook within minutes (depend on your internet speed).After logging into wikipedia click Create a book from Print/Export menu located on the left sidebar.Then open the page that you want to make the ebook and click the link <strong>Add the page to your bo</strong>ok.When the page is added the link is changed to <strong>Remove the page from your book</strong>.Click this if you want to remove the page.On next of it you can see <strong>Show book (18 pages).</strong> Shows the number of pages added to your book.Refer the figure shown below<a href='$Wikibook[2].png'>,<img height='30' border='0' width='244' src='http://coolefriend.com/wp-content/holder/2009/11/Wikibook_thumb.png' alt='Wikibook' title='Wikibook' style='border-width: 0px; display: inline;'/></a></p><br/><br/><p>After adding the pages and rearranging it you can<strong> download it as PDF</strong> file.This is the screenshot of an ebook that I created using this method.</p><br/><br/><p><a href='$Wikibook%20contents[2].png'><img height='93' border='0' width='244' src='http://coolefriend.com/wp-content/holder/2009/11/Wikibookcontents_thumb.png' alt='Wikibook contents' title='Wikibook contents' style='border-width: 0px; display: inline;'/></a> <a href='http://coolefriend.com/wp-content/holder/2009/11/Wikibookmade_thumb.png'><img height='97' border='0' width='244' src='$Wikibook%20made_thumb.png' alt='Wikibook made' title='Wikibook made' style='border-width: 0px; display: inline;'/></a> </p><br/><br/><p>Share your experience.If you know/find any hacks or tips don’t forget to share it with our readers.</p><br/><br/><div class='zemanta-pixie'><img src='http://img.zemanta.com/pixy.gif?x-id=f329e1a6-93a3-838b-b83a-da4d2c075add' alt='' class='zemanta-pixie-img'/></div></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com32tag:blogger.com,1999:blog-1388323436345103403.post-73030163670301539242009-07-26T03:23:00.001-07:002009-07-26T03:23:35.626-07:00New Device To Weigh A Single Atom<div xmlns='http://www.w3.org/1999/xhtml'> The idea is not new,but the delicate sensing system needed to detect the vibration and measure its frequency is new.European researchers have built a new device that can do just that. It may ultimately allow scientists to study the progress of chemical reactions, molecule by molecule.The new devise is a delicate sensing system needed to detect the vibration and measure its frequency. <br/> <img src='http://www.sciencedaily.com/images/2009/06/090630075614.jpg' style='max-width: 800px;'/><br/> <small> Real-life image (inset) of a carbon nanotube.</small><br/> <br/> Some nanotubes turn out to be semiconductors, depending on how the graphene sheet is wound, and it is these that offer the solution that CARDEQ has developed.It may then become possible to observe the radioactive decay of a single nucleus and to study other types of quantum mechanical phenomena.<br/><br/> [Source: <a href='http://www.sciencedaily.com/releases/2009/06/090630075614.htm' target='_blank'>sciencedaily</a>]<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com1tag:blogger.com,1999:blog-1388323436345103403.post-88259654703667723242009-07-26T03:07:00.001-07:002009-07-26T03:09:08.811-07:00Future of nanotechnology<div xmlns='http://www.w3.org/1999/xhtml'>The future of nanotechnology is a promising one.According to <a target='_blank' href='http://www.scientificamerican.com/article.cfm?id=nanotechnologys-future'>Scientific American</a>,between 1997 and 2005, investment in nanotech research and development by governments around the world soared from $432 million to about $4.1 billion, and corresponding industry investment exceeded that of governments by 2005. By 2015, products incorporating nanotech will contribute approximately $1 trillion to the global economy. About two million workers will be employed in nanotech industries, and three times that many will have supporting jobs.<br/><br/>Scientists are also developing ever more sophisticated ways of encapsulating molecules and delivering them on demand for targeted drug delivery reported by <a target='_blank' href='http://physicsworld.com/cws/article/print/19961'>physics world</a>.<br/><br/> Nanotechnology may have its biggest impact on the medical industry. Patients will drink fluids containing nanorobots programmed to attack and reconstruct the molecular structure of cancer cells and viruses. There's even speculation that nanorobots could slow or reverse the aging process, and life expectancy could increase significantly. Nanorobots could also be programmed to perform delicate surgeries -- such nanosurgeons could work at a level a thousand times more precise than the sharpest scalpel.Nanotechnology has the potential to have a positive effect on the environment. For instance, scientists could program airborne <a href='http://science.howstuffworks.com/nanotechnology4.htm' target='_blank'>nanorobots to rebuild the thinning ozone layer</a>.<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com26tag:blogger.com,1999:blog-1388323436345103403.post-48603322214790752112009-07-26T03:00:00.001-07:002009-07-26T03:00:42.847-07:00Problems with nanotechnology<div xmlns='http://www.w3.org/1999/xhtml'><b>Nanotechnology And Health:</b><br/> Günter Oberdörster, Ph.D., professor of Toxicology in Environmental Medicine and director of the university's EPA Particulate Matter Center, has already completed one study showing that inhaled nano-sized particles accumulate in the nasal cavities, lungs and brains of rats. Scientists speculate this buildup could lead to harmful inflammation and the risk of brain damage or central nervous system disorders.For decades Oberdörster has studied how the body interacts with ambient ultrafine particles, including automotive and power plant emissions and dust from the World Trade Center disaster. What's different about nanotechnology is that these particles are man-made into a well-defined size, down to a billionth of a meter, and appear to seep all the way into the mitochondria, or energy source, of living cells.<br/><br/> Chan an Assistant Professor at the University of Toronto's Institute of Biomaterials and Biomedical Engineering together with Hans Fischer, a PhD student in his group,argue that the development of predictive models of nanostructure toxicity requires a systematic mapping of the fate, kinetics, clearance, metabolism, protein coating, immune response and toxicity of nanostructures to the nanostructure’s physical properties within a life cycle model.<br/>"Currently, there is a common assumption that the small size of nanostructures allows them to easily enter tissues, cells, organelles, and functional biomolecular structures (i.e. DNA, ribosomes) since the actual physical size of an engineered nanostructure is similar to many biological molecules (e.g. antibodies, proteins) and structures (e.g. viruses)" explains Chan. "A corollary is that the entry of the nanostructures into vital biological systems could cause damage, which could subsequently cause harm to human health. However, a number of recent studies have demonstrated that despite the size of the nanostructures they do not freely go into all biological systems but are instead governed by the functional molecules added to their surfaces."<br/><br/><b>Nanotechnology And Environment:</b><br/><br/> Because of their tiny size, nanomaterials have special properties that make them ideal for a range of commercial and medical uses, but researchers are still trying to determine how they might affect humans and animals. Gold, for example, may behave differently when introduced at nanoscale into the human body, where it is chemically inert in traditional applications.Scientific studies also suggest nanoparticles can cause health problems and damage aquatic life. For instance, they lodge in the lungs and respiratory tract and cause inflammation, possibly at an even greater rate than asbestos and soot do."Nanoparticles are like the roach motel. The nanoparticles check in but they don't check out," said John Balbus, health program director for the advocacy group Environmental Defense. <br/><br/>This vedio describes <b>The environmental impact of nanomaterials </b>found on Youtube,<br/><div class='youtube-video'><object height='355' width='425'><param value='http://www.youtube.com/v/9ydO-Q7xFxQ' name='movie'> </param><param value='transparent' name='wmode'> </param><embed height='355' width='425' wmode='transparent' type='application/x-shockwave-flash' src='http://www.youtube.com/v/9ydO-Q7xFxQ'> </embed> </object></div><br/><br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com8tag:blogger.com,1999:blog-1388323436345103403.post-50116273164954394562009-07-26T02:43:00.001-07:002009-07-26T02:43:41.461-07:00History of nanotechnology<div xmlns='http://www.w3.org/1999/xhtml'>In 1965, <b>Gordon Moore</b>, one of the founders of Intel Corporation, made the astounding prediction that the number of transistors that could be fit in a given area would double every 18 months for the next ten years. This it did and the phenomenon became known as <b>Moore's Law</b>. <br/><br/>The history of nanotechnology begins with a lecture titled, '<b>There's Plenty of Room at the Bottom</b>' a talk given by physicist <b> Richard P. Feynman</b> at an <b>American Physical Society </b>meeting at Caltech on December 29, 1959; "there is nothing besides our clumsy size that keeps us from using this space. In his time, it was not possible for us to manipulate single atoms or molecules because they were far too small for our tools." His speech was completely theoretical and seemingly fantastic. He described how the laws of physics do not limit our ability to manipulate single atoms and molecules. Instead, it was our lack of the appropriate methods for doing so. However, he correctly predicted that the time would come in which atomically precise manipulation of matter would inevitably arrive.<br/><br/>Here is a shot vedio about the history of nanotecgnology found on Youtube,<br/><div class='youtube-video'><object height='355' width='425'><param value='http://www.youtube.com/v/dNPVGwPjkOs' name='movie'> </param><param value='transparent' name='wmode'> </param><embed height='355' width='425' wmode='transparent' type='application/x-shockwave-flash' src='http://www.youtube.com/v/dNPVGwPjkOs'> </embed> </object></div><br/>The term "nanotechnology" was first defined by Norio Taniguchi of the Tokyo Science University in a 1974 paper as follows: "'Nano-technology' mainly consists of the processing of, separation, consolidation, and deformation of materials by one atom or one molecule." Since that time the definition of nanotechnology has generally been extended to include features as large as 100 nm. The idea that nanotechnology embraces structures exhibiting quantum mechanical aspects, such as quantum dots, has further evolved its definition.<br/><br/>The history of nanotechnology in chronological order,<br/><br/><b>1959</b><br/>"There's Plenty of Room at the Bottom," a talk given by physicist Richard Feynman at an American Physical Society meeting at Caltech.<br/><br/><b>1974</b><br/>Taniguchi uses term "nano-technology" in paper on ion-sputter machining<br/><br/><b>1977</b><br/>Drexler originates molecular nanotechnology concepts at MIT<br/><br/><b>1981</b><br/>First technical paper on molecular engineering to build with atomic precision<br/>STM invented<br/><br/><b>1985</b><br/>Buckyball discovered<br/><br/><b>1986</b><br/>First book published,AFM invented,First organization formed<br/><br/><b>1987</b><br/>First protein engineered,First university symposium<br/><br/><b>1988</b><br/>First university course<br/><br/><b>1989</b><br/>First national conference,IBM logo spelled in individual atoms<br/><br/><b>1990</b><br/>Japan's STA begins funding nanotech projects,First nanotechnology journal<br/><br/><b>1991</b><br/>IBM endorses bottom-up path,Japan's MITI commits $200 million,Carbon nanotube discovered<br/><br/><b>1992</b><br/>First Congressional testimony,First textbook published<br/><br/><b>1993</b><br/>First coverage of nanotech from White House,First Feynman Prize in Nanotechnology awarded,"Engines of Creation" book given to Rice administration, stimulating first university nanotech center<br/><br/><b>1994</b><br/>Nanosystems textbook used in first university course<br/><br/><br/><b>1995</b><br/>First industry analysis of military applications,First think tank report<br/><br/><b>1996</b><br/>First European conference,NASA begins work in computational nanotech,$250,000 Feynman Grand Prize announced,First nanobio conference<br/><br/><b>1997</b><br/>First company founded,First design of nanorobotic system<br/><br/><b>1998</b><br/>First NSF forum,First DNA-based nanomechanical device<br/><br/><b>1999</b><br/>First safety guidelines,First Nanomedicine book published<br/><br/><b>2000</b><br/>President Clinton announces U.S. National Nanotechnology Initiative<br/><br/><b>2001</b><br/>First report on nanotech industry<br/><br/><b>2002</b><br/>First nanotech industry conference<br/><br/><b>2003</b><br/>Call for balancing NNI research portfolio,Drexler/Smalley debate is published in Chemical & Engineering News<br/><br/><b>2004</b><br/>First policy conference on advanced nanotech,First center for nanomechanical systems<br/><br/><b>2005</b><br/>At Nanoethics meeting, Roco announces nanomachine/nanosystem project count has reached 300<br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-80465837647901348912009-07-26T02:28:00.001-07:002009-07-26T02:28:15.088-07:00Introduction to Nanotechnology<div xmlns='http://www.w3.org/1999/xhtml'> <b>Nanotechnology</b> is the study and use of structures between 1 nanometer and 100 nanometers in size. Nanotechnology is the postulated ability to manufacture objects and structures with atomic precision, literally atom by atom. This technology will have tremendous potential if it can be developed; simple applications involve the creation of new and powerful materials, perfect diamond in bulk quantities and a tool to manipulate objects on any scale. More advanced applications would involve massively parallel nanocomputers, self-replication and more or less bright nanodevices able to interact with their surroundings.Nanotechnology is the science of the extremely tiny. According to the US Government’s National Nanotechnology Initiative (NNI) “nanotechnology is the understanding and control of matter at dimensions of roughly 1 to 100 nanometers, where unique phenomena enable novel applications.” <br/><br/>Here is a vedio found on Youtube,will give an introsuction to nanotechnology.<br/><div class='youtube-video'><object height='355' width='425'><param value='http://www.youtube.com/v/JqMh5NYsRck' name='movie'> </param><param value='transparent' name='wmode'> </param><embed height='355' width='425' wmode='transparent' type='application/x-shockwave-flash' src='http://www.youtube.com/v/JqMh5NYsRck'> </embed> </object></div><br/><br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-10181600320161770532009-07-26T02:16:00.001-07:002009-07-26T02:16:39.676-07:00Nanotechnology<div xmlns='http://www.w3.org/1999/xhtml'><b>Nanotechnology</b> refers to the science and technology of building devices, such as electronic circuits, from single atoms and molecules.The term nanotechnology been used more broadly to refer to techniques that produce or measure features less than 100 nanometers in size; this meaning embraces advanced microfabrication and metrology.<br/><br/>According to<b> Britannica Concise Encyclopedia</b> nanotechnogy is,<br/><br/>Manipulation of atoms, molecules, and materials to form structures on the scale of nanometres (billionths of a metre). These nanostructures typically exhibit new properties or behaviours due to quantum mechanics. In 1959 Richard Feynman first pointed out some potential quantum benefits of miniaturization. A major advancement was the invention of molecular-beam epitaxy by Alfred Cho and John Arthur at Bell Laboratories in 1968 and its development in the 1970s, which enabled the controlled deposition of single atomic layers. Scientists have made some progress at building devices, including computer components, at nanoscales. Faster progress has occurred in the incorporation of nanomaterials in other products, such as stain-resistant coatings for clothes and invisible sunscreens.<br/><br/>According to <b>wikipedia</b>,<br/><br/>Nanotechnology,is the study of the control of matter on an atomic and molecular scale. Generally nanotechnology deals with structures of the size 100 nanometers or smaller, and involves developing materials or devices within that size. Nanotechnology is very diverse, ranging from novel extensions of conventional device physics, to completely new approaches based upon molecular self-assembly, to developing new materials with dimensions on the nanoscale, even to speculation on whether we can directly control matter on the atomic scale.<br/><br/>The <b>U.S. National Science Foundation</b> defines it as: "Research and technology development in the length scale of approximately 1 to 100 nanometers." By this loose definition, some types of nanotechnology exist already, producing specialized materials and components including powders, films, and chemicals. Not spectacular, perhaps, but attractive to investors because many products will be improved significantly.<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-80361900481131990032009-07-22T05:03:00.001-07:002009-07-22T05:03:15.743-07:00Argonne technology enables high-speed data transfer<div xmlns='http://www.w3.org/1999/xhtml'> When I'm searching the internet for nanotechnology related news,I find this news,this will pave a datatransfer speed revolution,so just publishing it.<br/> <br/><b> GridFTP</b>, a protocol developed by researchers at Argonne National Laboratory, has been used to transfer unprecedented amounts of data over the Department of Energy's (DOE) Energy Sciences Network (ESnet), which provides a reliable, high-performance communications infrastructure to facilitate large-scale, collaborative science endeavors. <br/><br/>The Argonne-developed system proved key to enabling research groups at Oak Ridge National Laboratory in Tennessee and the National Energy Research Scientific Computing Center in California to move large data sets between the facilities at a rate of 200 megabytes per second. The deployment of GridFTP at the two computing facilities is part of a major project to optimize wide-area network data transfers between sites hosting DOE leadership-class computers.<br/><br/> [Source: <a href='http://www.anl.gov/Media_Center/News/2009/news090617.html' target='_blank'>Argonne</a>]<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-74590550165840116232009-07-22T04:59:00.001-07:002009-07-22T04:59:17.068-07:00Nanotube water doesn't freeze<div xmlns='http://www.w3.org/1999/xhtml'> A new form of water has been discovered by physicists in Argonne's Intense Pulsed Neutron Source (IPNS) Division. Called nanotube water, these molecules contain two hydrogen atoms and one oxygen atom but do not turn into ice — even at temperatures near absolute zero. <br/> <img height='157' width='174' src='http://www.anl.gov/Media_Center/News/2005/photo/050513nanotube_water_01-200.jpg' style='max-width: 800px;'/><br/> <small> NANO-WATER</small><br/><br/> Instead, inside a single wall tube of carbon atoms less than 2 nanometers, or 2 billionths of a meter wide, the water forms an icy, inner wall of water molecules with a chain of liquid-like water molecules flowing through the center. This occurs at 8 Kelvins, which is minus 445 Fahrenheit. As the temperature rises closer to room temperature, the nanotube water gradually becomes liquid.<br/><br/> [Source: <a href='http://www.anl.gov/Media_Center/News/2005/IPNS050513.html' target='_blank'>Argonne</a>]<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-62460890679775366962009-07-22T04:52:00.001-07:002009-07-22T04:56:16.997-07:00Nano-Heart<div xmlns='http://www.w3.org/1999/xhtml'> Northwestern University chemist Samuel Stupp has used nanotechnology - specifically molecules called peptide amphiphiles - to help heal heart damage in mice. The scientists induced heart attacks in the mice, then injected them with the peptide amphiphiles (modified to bond with a protein called heparin). The nanofibers collected at the site of the injury and helped speed the body's natural healing, according to researchers. Within a month, the injured mice were virtually on par with the healthy mice. The procedure seems to have also helped healing in rabbits, though obviously whether a similar procedure would be significant in aiding human healing will require more testing.<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-32274681331659246542009-07-22T04:50:00.001-07:002009-07-22T04:50:10.758-07:00'Flying' nanotubes are strong and hard<div xmlns='http://www.w3.org/1999/xhtml'> Carbon nanotubes are the strongest material in the world. Scientists at the U.S. Department of Energy's Argonne National Laboratory tried to combine the best of both worlds by creating a composite nanostructure. <br/><br/><u><b>Synthesis</b></u><br/><br/><img src='http://farm1.static.flickr.com/39/124782973_1dbf016ac0_m.jpg' style='max-width: 800px;'/> They wanted to grow tiny carbon tubes with tiny diamonds.But the results were not as expected. Instead, the experiment altered the surface area of the nanotubes, creating wing-like extensions. Even though the result wasn't what the experimenters were looking for, these modified surfaces may push nanotubes further into the world of practical and applied materials and systems. It also provides insight into how to synthesize an emerging class of material called ''nanocarbons,'' which consist of different allotropes -- the same elements with different molecular structures -- of carbon combined at the nanoscale to yield new materials with unique properties.<br/><br/>The carbon atoms that make up nanotubes and fullerenes are bonded like graphite in sheets that resemble ''chicken wire.'' When the sheets are rolled into a ball they make fullerenes -- the soccer-ball-shaped carbon molecules, different from both graphite and diamond. If the sheets are rolled into a seamless cylinder, they create carbon nanotubes.The unique properties of these nanotubes, including their strength, electrical properties and conducting capabilities, make them useful in electronic and mechanical applications. And they are small -- only one ten-thousandth the width of a human hair.<br/><br/><u><b>Applications</b></u><br/><br/> Carbon nanotubes have been used for structural reinforcement and in lithium-ion batteries and television screen displays, but Argonne scientist John Carlisle said they are still in the prototype stage.<br/><br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-51182635565967744632009-07-22T04:43:00.001-07:002009-07-22T04:43:24.273-07:00Turning Nanotubes Into Nanoribbons<div xmlns='http://www.w3.org/1999/xhtml'><img src='http://tbn3.google.com/images?q=tbn:SoSPB8CR1zfTJM:http://storybank.stanford.edu/files/main_image/nanoribbons.jpg' style='max-width: 800px;'/> A chemical method can unzip multiwalled carbon nanotubes (MWNTs) along their lengths to produce ribbonlike strips of graphene, according to researchers in Mexico.These graphene nanoribbons, which are elongated one-atom-thick strips of carbon, exhibit tantalizing mechanical and electronic properties. The materials are under study for applications ranging from hydrogen storage and battery electrodes to polymer nanocomposites and sensors.<br/><br/><u><b>Synthesis</b></u><br/><br/>Abraham G. Cano-Márquez, Fernando J. Rodríguez-Macías, and Yadira I. Vega-Cantú, all of the Institute for Scientific & Technological Research, in San Luis Potosi, and coworkers report that treating MWNTs with lithium and ammonia results in the insertion of ammonia-solvated lithium ions between the nanotubes' concentric graphene sheets. That step ruptures the multiwalled structures by prying apart the layers, which are further separated by way of hydrochloric acid and heat treatments.<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-88184085793330641072009-07-22T04:39:00.001-07:002009-07-22T04:39:09.850-07:00DNA Sorts Carbon Nanotubes<div xmlns='http://www.w3.org/1999/xhtml'>Single-walled carbon nanotubes (SWNTs) show great promise as components of nanoscale electronic devices, but most commercial applications have been stymied by the difficulty in isolating nanotubes of identical chirality from a synthetic mixture.<br/><br/> Now, Xiaomin Tu and Ming Zheng of <b>DuPont Central Research & Development</b>, together with <b>Suresh Manohar and Anand Jagota</b> of Lehigh University, have shown that the unique molecular properties of DNA can be exploited to sort SWNTs (Nature 2009, 460, 250).<br/><br/> <img height='189' width='138' src='http://pubs.acs.org/cen/_img/87/i29/8729notw18_DNA.gif' style='max-width: 800px;'/><br/> <small><small><small>[A DNA sequence consisting of ATTT repeats forms a barrel-shaped structure around a single type of chiral carbon nanotube.]</small></small></small><br/><br/> Single walled nanotubes synthesis produces a mixture of nanotubes with nonuniform diameters and chiralities and, therefore, heterogeneous physicochemical properties. Having previously shown that a particular DNA sequence could form an ordered structure on SWNTs, Zheng and colleagues reasoned that they might be able to find a DNA sequence to purify each type of SWNT in a synthetic mixture. The problem was identifying the correct DNA molecules among an unfeasibly large number (1018) of possible 30-nucleotide sequences.<br/><br/> To reduce the DNA library to a more manageable size of 350 oligonucleotides, the researchers devised a sequence-pattern-expansion scheme that considered all possible DNA sequences composed of mono-, di-, tri-, and tetranucleotide repeats. They added each DNA oligonucleotide to a random mixture of SWNTs. Then, they used ion-exchange chromatography to separate the 350 solutions into fractions, which they analyzed spectroscopically for the presence of specific DNA-SWNT hybrids.<br/><br/> [Source:<a href='http://pubs.acs.org/cen/news/87/i29/8729notw8.html' target='_blank'> ACS</a>]<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-11925403377007995122009-07-22T04:14:00.001-07:002009-07-22T04:16:10.963-07:00Nanotube Building Block Created<div xmlns='http://www.w3.org/1999/xhtml'><font color='#993300'> Route to cycloparaphenylenes could lead to a new way to make carbon nanotubes.</font><br/><font color='#000000'><br/>A NOVEL REACTION that could be generally useful for aromatic synthesis has made possible the assembly of a long-sought family of compounds: the cycloparaphenylenes, which are strings of benzenes joined in a ring-around-the-rosy style. The compounds could prove useful for constructing carbon nanotubes, which hold promise for electronics, advanced biosensors, and other applications.<br/><hr class='jump'/><font color='#993300'><b> FUNDAMENTAL UNIT</b></font> <br/>Cycloparaphenylenes (a), made by Bertozzi and coworkers in 9-, 12-, and 18-benzene-ring sizes, are basic building blocks (highlighted bonds) of armchair carbon nanotubes (b).<br/> <img style='max-width: 800px;' src='http://pubs.acs.org/cen/_img/86/i51/8651NOTW6_img1b.gif'/> <img height='135' width='118' style='max-width: 800px;' src='http://pubs.acs.org/cen/_img/86/i51/8651NOTW6_img1a.gif'/><br/> (</font><font color='#000000'>a) Cycloparaphenylenes</font><font color='#000000'> (b)Armchair carbon nanotubes<br/><hr class='jump'/></font><font color='#000000'><u><b>Synthesis</b></u><br/><br/></font><font color='#000000'>"<b><font color='#993300'>It's a landmark synthesis</font></b>" because of its brevity, elegance, creativity, and high product yields, comments Graham J. Bodwell of Memorial University of Newfoundland, in St. John's, who specializes in conjugated "belt" compound synthesis.<br/><br/> Ramesh Jasti, chemistry professor and <a target='_blank' href='http://www.hhmi.org/'>Howard Hughes Medical Institute </a>investigator <a target='_blank' href='http://www.cchem.berkeley.edu/crbgrp/'>Carolyn R. Bertozzi</a>, and coworkers at <a target='_blank' href='http://foundry.lbl.gov/'>Lawrence Berkeley National Laboratory's Molecular Foundry</a> and the <a target='_blank' href='http://berkeley.edu/'>University of California, Berkeley</a>, carried out the new synthesis. They succeeded by creating rings of benzenes and cyclohexadienes and then using a new aromatization reaction they developed to convert the cyclohexadienes to benzenes.<br/><br/>The aromatization reaction works under low-temperature conditions and generates high yields of pure products; it is an important achievement in itself. Previously, aromatizations of highly strained compounds led to undesirable rearrangements or formation of complex mixtures.<br/><br/> [Source: <a href='http://pubs.acs.org/cen/news/86/i51/8651notw6.html' target='_blank'>ACS</a>]<br/></font></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-75869374037249413332009-07-22T04:05:00.001-07:002009-07-22T04:05:59.568-07:00A Better Way to Make Nanotubes<div xmlns='http://www.w3.org/1999/xhtml'><b> A doughnut-shaped molecule synthesized by Berkeley Lab scientists could enable the targeted development of carbon nanotubes, which hold promise for faster electronic devices and other advanced technologies.</b><br/> <img height='128' width='142' src='http://newscenter.lbl.gov/wp-content/uploads/nanohoop-300x262.jpg' style='max-width: 800px;'/><br/> <small>Nanohoop</small><br/> Berkeley Lab scientists synthesized a compound for the first time could help to push nanotechnology out of the lab and into faster electronic devices, more powerful sensors, and other advanced technologies.The scientists developed a hoop-shaped chain of benzene molecules that had eluded synthesis, despite numerous efforts, since it was theorized more than 70 years ago.<br/><br/> The much-anticipated debut of the compound, called cycloparaphenylene, couldn’t be better timed. It comes as scientists are working to improve the way carbon nanotubes are produced, and the newly synthesized nanohoop happens to be the shortest segment of a carbon nanotube. Scientists could use the segment to grow much longer carbon nanotubes in a controlled way, with each nanotube identical to the next.<br/><br/><u><b>Synthesis</b></u><br/><br/> To synthesize the elusive cycloparaphenylene, the team developed a relatively simple, low-temperature way to bend a string of benzene rings — which normally resist bending — into a hoop. The result is a structure that is as unusual as it is potentially useful. It should be flat, but it’s circular. And it’s poised to improve the way one of most promising stars in nanotechnology is produced.Carbon nanotubes are hollow wires of pure carbon about 50,000 times narrower than a human hair. <br/><br/> They can be semiconducting or metallic depending on how they’re structured. Their unique properties could usher in a new era of faster and smaller computers, or tiny sensors powerful enough to detect a single molecule.But carbon nanotubes haven’t made inroads into the electronics industry and other sectors because they’re difficult to make in large quantities. They’re currently produced in batches, with only a handful of nanotubes in each batch possessing the desired characteristics. <br/><br/> This shotgun approach works fine in the lab, but it’s too inefficient for commercial applications.Cycloparaphenylene offers a more targeted approach. The family of compounds forms the smallest carbon hoop structure with a set diameter and set orientation of benzene molecules, which are the two variables that determine a nanotube’s electronic properties.Because of this, cycloparaphenylene molecules could be used as seeds or templates to grow large batches of carbon nanotubes with just the right specifications.<br/><br/>This combination of precision and high yield will be needed if carbon nanotubes are to make the jump from the lab to the commercial sector. In order for carbon nanotubes to replace silicon wafers in electronics, for example, they’ll need to be just as unblemished as silicon wafers, and just as easy to make in large numbers.<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-84450766973989808832009-07-22T03:59:00.001-07:002009-07-22T03:59:06.265-07:00Twinkling nanostars cast new light into biomedical imaging.<div xmlns='http://www.w3.org/1999/xhtml'><a href='http://news.uns.purdue.edu/x/2009b/090721WeiRitchieNanostar.html' target='_blank'>Purdue University</a> researchers have created magnetically responsive gold nanostars that may offer a new approach to biomedical imaging. <br/> <img src='http://news.uns.purdue.edu/images/+2009/nanostar-researchLO.jpg' style='max-width: 800px;'/><br/><small><small> Research team members stand with equipment used for gyromagnetic imaging of gold nanostars.</small></small><br/> <br/> The nanostars gyrate when exposed to a rotating magnetic field and can scatter light to produce a pulsating or "twinkling" effect. This twinkling allows them to stand out more clearly from noisy backgrounds like those found in biological tissue. <b>Alexander Wei,</b> a professor of chemistry, and Kenneth Ritchie, an associate professor of physics, led the team that created the new gyromagnetic imaging method.<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-86324167243131525062009-07-22T03:55:00.001-07:002009-07-22T03:55:42.630-07:00Nanotubes to improve artificial joints<div xmlns='http://www.w3.org/1999/xhtml'><a href='http://news.uns.purdue.edu/html4ever/2004/041123.Webster.align.html' target='_blank'> Purdue university</a> researchers align nanotubes to improve artificial joints.Researchers have shown that artificial joints might be improved by making the implants out of tiny carbon tubes and filaments that are all aligned in the same direction, mimicking the alignment of collagen fibers and natural ceramic crystals in real bones. The researchers already have shown in a series of experiments that bone cells in Petri dishes attach better to materials that possess smaller surface bumps than are found on conventional materials used to make artificial joints. The smaller features also stimulate the growth of more new bone tissue, which is critical for the proper attachment of artificial joints once they are implanted.<br/> <img src='http://news.uns.purdue.edu/images/+2004/webster-alignLO.jpg' style='max-width: 800px;'/><br/> Arrays of nanofibers<br/><br/> Now, the Purdue researchers have shown even more enhanced cell adhesion and growth when so-called "nanotubes" and nanofibers are aligned in the same direction. This orientation is similar to the way collagen and natural ceramic crystals, called hydroxyapatite, are aligned in bone, said <a href='https://engineering.purdue.edu/BME/People/viewPersonById?resource_id=2257' target='_blank'>Thomas Webster</a>, an assistant professor of biomedical engineering at Purdue.<br/><br/> [Source: <a href='http://news.uns.purdue.edu/html4ever/2004/041123.Webster.align.html' target='_blank'>Prude</a>]<br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-53403620501503347572009-07-22T00:53:00.001-07:002009-07-22T00:53:34.321-07:00New method for producing carbon nanoscrolls.<div xmlns='http://www.w3.org/1999/xhtml'> <a href='http://www.ucla.edu/' target='_blank'>UCLA</a> chemists report new method for producing carbon nanoscrolls, an alternative to nanotubes.A room-temperature chemical method for producing a new form of carbon called carbon nanoscrolls. <br/> <img src='http://www.nature.com/nature/journal/v431/n7009/images/431640a-f2.0.jpg' style='max-width: 800px;'/><br/> Nanoscrolls are closely related to the carbon nanotubes.Nanoscrolls have significant advantages over them,which may have numerous industrial applications.Nanotubes are pure carbon sheets in a tubular form, capped at each end. Viculis and Mack's carbon nanoscrolls are also pure carbon but the sheets are curled up, without the caps on the ends, potentially allowing access to significant additional surface area. While nanotubes are normally made at high temperatures, nanoscrolls can be produced at room temperature. <br/>[Source :<a href='http://www.scienceblog.com/cms/new_method_for_producing_carbon_nanoscrolls_an_alternative_to_nanotubes' target='_blank'>Scienceblog</a>]</div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-39903747953159591532009-07-22T00:14:00.001-07:002009-07-22T00:14:42.848-07:00Global Nanoelectronics Market will be worth $409.6 Billion by 2015<div xmlns='http://www.w3.org/1999/xhtml'><span style='font-size: 10pt; font-family: Arial;'> Here is a hot news for nano researchers and scientisits.Global nanoelectronics market may reach <b>$409.6 billion by 2015-</b></span><span style='font-size: 10pt; font-family: Arial;'>according to New research report by GIA</span><span style='font-size: 10pt; font-family: Arial;'><b>.</b><br />Nanoelectronics is expected to exercise a considerable influence on<br />semiconductors, displays, memory and storage devices, and communication<br />devices.GIA exopects that nanoelectronics based devices will become<br />more reliable, interactive, cost effective, and would be capable of<br />surviving under extreme weather conditions and pollution. Integration<br />of molecular biology and nanoelectronics creates avenues for developing<br />hybrid devices that would find utilization in a wide range of<br />biological and medical application.</span></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-52531348944359811652009-07-19T00:16:00.001-07:002009-07-19T00:16:29.459-07:00Buckyball against HIV Virus<div xmlns='http://www.w3.org/1999/xhtml'> <br/><a href='http://www.rice.edu/' target='_blank'>Rice University's </a>Andrew Barron and his group, working with labs in Italy, Germany and Greece, have identified specific molecules that could block the means by which the deadly virus spreads by taking away its ability to bind with other proteins.The groups reported their findings in a paper published on the American Chemical Society's Journal of Chemical Information and Modeling web site.Their method of modeling ways to attack HIV may not be unique, but their collaboration is. Research groups from five institutions -- two in Greece, one in Germany, one in Italy and Barron's group at Rice -- came together through e-mail contacts and conversations over many months, each working on facets of the problem. "Not all the groups have ever met in person," Barron said. <br/> <img height='141' width='193' src='http://www.godunov.com/bucky/buckyball-3.gif' style='max-width: 800px;'/><br/>Most remarkable, he said, is that their research to date has been completely unfunded.Using simulations to narrow down a collection of fullerenes to find the good ones is "the least time-consuming low-cost procedure for efficient, rational drug design," the team wrote.<br/><br/> [Source : <a href='http://www.azonano.com/news.asp?newsID=11605' target='_blank'>Azonano</a>]<br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-91806961362125824842009-07-19T00:05:00.001-07:002009-07-19T00:05:45.497-07:00Carbon Nanotube for AFM Tips.<div xmlns='http://www.w3.org/1999/xhtml'> <br/><b> Carbon Design Innovations, Inc.</b> announced the availability of two new atomic force microscope (<b>AFM</b>) probes types with carbon nanotube (CNT) tips. The<b> CCHAR (carbon core high-aspect ratio) </b>and <b>CCHR (carbon core highresolution) </b>CNT probes offer quantum improvements for <b>AFM imaging</b>, <i>substantially improving results</i>, reducing overall cost of operation and opening new avenues for research.<br/> <img height='135' width='228' src='http://www.azonano.com/images/News/NewsImage_12071.jpg' style='max-width: 800px;'/><br/> Carbon Design Innovations, Inc. has a patent pending process for the deterministic manufacture of carbon nanotube (CNT) devices. Based on this breakthrough process, the company is able to produce CNT AFM probes that are perfectly straight and precisely aligned, allowing them to be set at desired angles to the surface.<br/><br/> [Source: <a href='http://www.azonano.com/news.asp?newsID=12071' target='_blank'>Azonano</a>]<br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-20149482644889592702009-07-18T23:57:00.001-07:002009-07-19T00:00:01.318-07:00Tin Disulfide Nanotubes.<div xmlns='http://www.w3.org/1999/xhtml'><img height='82' width='222' style='max-width: 800px;' src='http://www.azonano.com/images/News/NewsImage_12141.jpg'/> A team of researchers led by Wolfgang Tremel at <a target='_blank' href='http://www.uni-mainz.de/eng/13160.php'>Johannes Gutenberg University Mainz </a>have now developed a new technique for producing tin disulfide nanotubes. According to the report published in the journal Angewandte Chemie, the scientists have found a way of 'growing' SnS2 tubules from a metal droplet.<br/><br/><u><b>Synthesis</b></u><br/> They first used the <b>vapour-liquid-solid (VLS) process</b>, a technique more commonly used to produce semicon-ductor nanowires. Bismuth powder is combined with tin disulfide nanoflakes, and the mixture is heated in a tube furnace under an argon gas flow. The product of the reaction is deposited at the cooler end.<br/><br/> Nanodroplets of bismuth are formed in the furnace, and these act as local collec-tion points for tin. In this manner, the reaction partners accumulate in the metal droplets, providing the raw material from which nanotubes can be grown. Tremel explains: "In this process, the metal droplets are retained in the form of spheres at the end of the tubes, while the nanotubes grow out of them like hairs from follicles. And thanks to the catalytic effect provided by the metal droplets, it is possible to grow nanotubes even at relatively low temperatures."<br/><br/>Using the new technique, the team has been able to produce perfect nanotubes with diameters in a range of 30 - 40 nm and lengths of 100 - 500 nm consisting of several layers of SnS2.<br/> [Source : <a target='_blank' href='http://www.azonano.com/news.asp?newsID=12141'>azonano</a> ]<br/><br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-80864568438001177262009-07-18T23:54:00.001-07:002009-07-18T23:54:15.861-07:00Carbon Nanotubes Suitable for Electronics and Medicine.<div xmlns='http://www.w3.org/1999/xhtml'> <br/> A team of researchers from DuPont and <a href='http://www.lehigh.edu/' target='_blank'>Lehigh University</a> has reported a breakthrough in the quest to produce carbon nanotubes (CNTs) that are suitable for use in electronics, medicine and other applications.<br/>Source : <a href='http://www.azonano.com/news.asp?newsID=12457' target='_blank'>azonano</a><br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0tag:blogger.com,1999:blog-1388323436345103403.post-14168197593838218252009-07-18T23:51:00.001-07:002009-07-18T23:51:54.482-07:00Carbon Nanotubes As Weapons Against Cancer.<div xmlns='http://www.w3.org/1999/xhtml'> Over the past month, three new research papers have highlighted the potential of nanotubes as weapons against cancer.A group headed by James R. Baker, Jr., M.D., University of Michigan, describes its success in linking single-molecule nanoparticles known as dendrimers to the surface of multiwalled carbon nanotubes. The resulting combination nanomaterial is highly stable, readily disperses in water, and is biocompatible.The dendrimers that Dr. Baker’s group uses function as targeting agents that deliver the nanotubes specifically to tumor cells that overexpress high-affinity folic acid receptors. Although other research teams also have developed methods for targeting nanotubes to tumors, this approach holds particular promise because dendrimers also can be modified to carry drugs and imaging agents as well as targeting agents. <br/><br/>More >>> <a href='http://nano.cancer.gov/programs/nanotech_platforms.asp' target='_blank'>National Cancer Institute Cancer Nanotechnology Platform Partnerships</a><br/><br/></div>Nanoguruhttp://www.blogger.com/profile/11175461203708472164noreply@blogger.com0