Nanotechnology Nanotechnology ("nanotech") is the manipulation of matter on an atomic, molecular, and supramolecular scale. The earliest, widespread description of nanotechnology[1][2] referred to the particular technological goal of precisely manipulating atoms and molecules for fabrication of macroscale products, also now referred to as molecular nanotechnology. A more generalized description of nanotechnology was subsequently established by the National Nanotechnology Initiative, which defines nanotechnology as the manipulation of matter with at least one dimension sized from 1 to 100 nanometers. This definition reflects the fact that quantum mechanical effects are important at this quantum-realm scale, and so the definition shifted from a particular technological goal to a research category inclusive of all types of research and technologies that deal with the special properties of matter that occur below the given size threshold. Origins[edit] Comparison of Nanomaterials Sizes
Graphene is Next Valkyrie Ice Graphene. If you’ve never heard about it, don’t worry, a lot of people haven’t, because it’s really only been “discovered” relatively recently, and most of the truly interesting news about it has been in the last year. The amazing thing is that we’ve actually been using it for centuries, in the form of the common pencil. Graphene is a form of carbon, much like carbon nanotubes and other fullerenes, with one major difference. By now, most of you are familiar with carbon nanotubes, a.k.a. But that isn’t all. All of these properties make graphene a very important material for the future of electronics. Let’s think about that for a moment. That’s a jump of two or three orders of magnitude up the exponential curve, my friends, especially when you combine it with the advances in multi-core technology and parallel computing. We’re talking about that smartphone in your pocket having a thousand times the computing power of your desktop PC, but using no more power.
nano tech 2013 International Nanotechnology Exhibition & Conference Beginner's Guide to Aerodynamics At this Web site you can study aerodynamics at your own pace and to your own level of interest. Some of the topics included are: Newton's basic equations of motion; the motion of a free falling object, that neglects the effects of aerodynamics; the terminal velocity of a falling object subject to both weight and air resistance; the three forces (lift, drag, and weight) that act on a glider; and finally, the four forces that act on a powered airplane. Because aerodynamics involves both the motion of the object and the reaction of the air, there are several pages devoted to basic gas properties and how those properties change through the atmosphere. This site was created at NASA Glenn as part of the Learning Technologies Project (LTP). It is currently supported by the Aeronautics Research Mission Directorate at NASA HQ through the Educational Programs Office at NASA Glenn. There is a special section of the Beginner's Guide which deals with compressible, or high speed, aerodynamics.
Nanotechnology Just give me the FAQ The next few paragraphs provide a brief introduction to the core concepts of nanotechnology, followed by links to further reading. Manufactured products are made from atoms. If we rearrange the atoms in coal we can make diamond. If we rearrange the atoms in sand (and add a few other trace elements) we can make computer chips. If we rearrange the atoms in dirt, water and air we can make potatoes. Todays manufacturing methods are very crude at the molecular level. It's like trying to make things out of LEGO blocks with boxing gloves on your hands. In the future, nanotechnology (more specifically, molecular nanotechnology or MNT) will let us take off the boxing gloves. "Nanotechnology" has become something of a buzzword and is applied to many products and technologies that are often largely unrelated to molecular nanotechnology. Nanotechnology will let us: Achieve the ultimate in precision: almost every atom in exactly the right place. Some Frequently Asked Questions Books
Silica Aerogel (TEOS, Base-Catalyzed) Editor’s Note: This is an adaptation of the silica aerogel procedure from the Lawrence Berkeley National Laboratory site about aerogels, which for a long time was the only procedure for making aerogels publicly available. That procedure, we’re sorry to say, does not work. Maybe you’ve tried it. If you have, you’ll have noticed that the solution stays separated as two layers and a gel never forms. That’s because there’s not enough alcohol. Maybe it was a typo. Materials Tetraethoxysilane (tetraethyl orthosilicate), Si(OC2H5)4Absolute (200-proof) ethanolDeionized waterAmmonium hydroxide, 28-30 wt % in waterAmmonium fluoride, NH4FOptionalAcetone Gel Preparation An Excel calculator for determining amounts of chemicals required by target volume (mL) or mass (g) is available. Weigh 1.852 g NH4F and add it to 100 mL of water. What Everything Does TEOS is the source of the silica. What Doesn’t Work Not using ammonium fluoride. Variables You Can Play With Gel Processing Conditions What You Should Get
Nanotechnology is coming by Ralph C. Merkle, Principal Fellow, Zyvex This is the English original of an article translated into German and published in the Frankfurter Allgemeine Zeitung of Monday, September 11 2000 on page 55. In the coming decades nanotechnology could make a supercomputer so small it could barely be seen in a light microscope. Not long ago, such a forecast would have been ridiculed. At its heart, the coming revolution in manufacturing is a continuation of trends that date back decades and even centuries. The remarkably low manufacturing cost comes from self replication. While nanotechnology does propose to use self replication, it does not propose to copy living systems. Now that the feasibility of nanotechnology is widely accepted, we enter the next phase of the public discussion: what policies should we adopt to best deal with it? Self replication is at the heart of many policy discussions. Consider, for example, the difference between a bird and an airplane. Further reading:
Carbon Nanotubes Transmission electron microscopy of carbon nanotubes: a warning. Carbon nanotube science and technology Carbon nanotubes are molecular-scale tubes of graphitic carbon with outstanding properties. They are among the stiffest and strongest fibres known, and have remarkable electronic properties and many other unique characteristics. For these reasons they have attracted huge academic and industrial interest, with thousands of papers on nanotubes being published every year. Commercial applications have been rather slow to develop, however, primarily because of the high production costs of the best quality nanotubes. The current huge interest in carbon nanotubes is a direct consequence of the synthesis of buckminsterfullerene, C60 , and other fullerenes, in 1985. A transmission electron micrograph of some multiwalled nanotubes is shown in the figure (left). Structure The bonding in carbon nanotubes is sp, with each atom joined to three neighbours, as in graphite. Synthesis Properties Nanohorns