Nanotech or no NO TECH?

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This blog forth coming gives some interesting explanations. A 1000th of a micron is a nanometer. Yet to know something exists in this amount and to measure it is one thing. Until we jointly understand the workings of the immune system before we go to manipulating, we are doomed. A typical example is the reduction of IFN -gamma upon the ingestion of melatonin. I could have told you that! You are really starting to mess up in trying to get some sleep and trying to be "natural". You will naturally dispose of yourself by a slow death.
Anyway for the sake of enlightenment and in the name of science, I give you this blog and its address for future reference.

My students Nanotech info for this week
Dear students I happen to read many interesting things on Nano and one of the sample i would like to share with you all...http://www.nanotech-now.com/In the site an introductory stuff to beginer is presented very nicely...browse through the session and come prepared...It starts as"Truly revolutionary nanotechnology products, materials and applications, such as nanorobotics, are years in the future (some say only a few years; some say many years). What qualifies as "nanotechnology" today is basic research and development that is happening in laboratories all over the world. "Nanotechnology" products that are on the market today are mostly gradually improved products (using evolutionary nanotechnology) where some form of nanotechnology enabled material (such as carbon nanotubes, nanocomposite structures or nanoparticles of a particular substance) or nanotechnology process (e.g. nanopatterning or quantum dots for medical imaging) is used in the manufacturing process. In their ongoing quest to improve existing products by creating smaller components and better performance materials, all at a lower cost, the number of companies that will manufacture "nanoproducts" (by this definition) will grow very fast and soon make up the majority of all companies across many industries. Evolutionary nanotechnology should therefore be viewed as a process that gradually will affect most companies and industries........"Have the habit of going through the latest trends in nanotechnology through internet
Posted by DR.P.T.Kalaichelvan at 9:42 AM 0 comments
Labels: cas in botany, chennai, kalaichelvan, madras university, nano, nanotechnology.nano
Thursday, January 24, 2008

Size matters much that is Nano
SIZELet's start BIG to explain about Nano-sizeA meter is about the distance from the tip of your nose to the end of your hand (1 meter = 3.28 feet). One thousandth of that is a millimeter.Now take one thousandth of that, and you have a micron: a thousandth of a thousandth of a meter. Put another way: a micron is a millionth of a meter, which is the scale that is relevant to - for instance - building computers, computer memory, and logic devices.Let’s go smaller to the nanometerA nanometer is one thousandth of a micron, and a thousandth of a millionth of a meter (a billionth of a meter). Imagine: one billion nanometers in a meter.Click image for larger version. Courtesy and © Quantum Dot CorporationAnother perspective: a nanometer is about the width of six bonded carbon atoms, and approximately 40,000 are needed to equal the width of an average human hair. Another way to visualize a nanometer: 1 inch = 25,400,000 nanometers Red blood cells are ~7,000 nm in diameter, and ~2000 nm in heightWhite blood cells are ~10,000 nm in diameterA virus is ~100 nmA hydrogen atom is .1 nmNanoparticles range from 1 to 100 nmFullerenes (C60 / Buckyballs) are 1 nmQuantum Dots (of CdSe) are 8 nmDendrimers are ~10 nmDNA (width) is 2 nmProteins range from 5 to 50 nmViruses range from 75 to 100 nmBacteria range from 1,000 to 10,000 nmFor our purposes, nanometers pertain to science, technology, manufacturing, chemistry, health sciences, materials science, space programs, and engineering.Nanotechnology is the understanding and control of matter at dimensions of roughly 1 to 100 nanometers, where unique phenomena enable novel applications. Encompassing nanoscale science, engineering and technology, nanotechnology involves imaging, measuring, modeling, and manipulating matter at this length scale. At the nanoscale, the physical, chemical, and biological properties of materials differ in fundamental and valuable ways from the properties of individual atoms and molecules or bulk matter. Nanotechnology R&D is directed toward understanding and creating improved materials, devices, and systems that exploit these new properties. From What is Nanotechnology?Powers of 10 From 10-15 meters (a fermi), in steps of 10, to 10 -9 meters (nanometer), all the way out to 10 +16 meters (a lightyear), and finally, to 10 +23 meters (10 million light years). If you have not seen this really neat series of viewpoints, it can help to put scale into perspective! "View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of the National High Magnetic Field Laboratory in Tallahassee, Florida. After that, begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, the cell nucleus, chromatin, DNA and finally, into the subatomic universe of electrons and protons." New Scientist has a great illustration on size.Metric Prefix Table Units Conversion Tool 1 Units Conversion Tool 2


What is Nanotechnology? Nanotechnology is the act of purposefully manipulating matter at the atomic scale, otherwise known as the "nano-scale." Coined as "Nanotechnology" in a 1974 paper by Norio Taniguchi at the University of Tokyo, and encompassing a multitude of rapidly emerging technologies, based upon the scaling down of existing technologies to the next level of precision and miniaturization. Taniguchi approached nanotechnology from the 'top-down' standpoint, from the viewpoint of a precision engineer. Foresight Nanotech Institute Founder K. Eric Drexler introduced the term "nanotechnology" to the world in 1986, using it to describe a 'bottom-up' approach. Drexler approaches nanotechnology from the point-of-view of a physicist, and defines the term as "large-scale mechano-synthesis based on positional control of chemically reactive molecules." Broadly speaking however, Answers differ depending on who you ask, and their background.
It uses a basic unit of measure called a "nanometer" (abbreviated nm). Derived from the Greek word for midget, "nano" is a metric prefix and indicates a billionth part (10-9). There are one billion nm's to a meter. Each nm is only three to five atoms wide. They're small. Very small. ~40,000 times smaller than the width of an average human hair. One aspect of nanotechnology is all about building working mechanisms using components with nanoscale dimensions (MNT), such as super small computers (think bacteria-sized) with today's MIPS capacity, or supercomputers the size of a sugar cube, possessing the power of a billion laptops, or a regular sized desktop model with the power of trillions of today's PC's. Some of the most promising potential of nanotechnology exists due to the laws of quantum physics. Quantum physics laws take over at this scale, enabling novel applications in optics, electronics, magnetic storage, computing, catalysts, and other areas. Regardless of the diverse opinions on the rate at which nanotechnology will be implemented, people who make it a habit of keeping up with technology advances agree on this: it is a technology in its infancy, and it holds the potential to change everything. Read this great Introduction from the Center for Responsible Nanotechnology for a better understanding of what nanotechnology is and is not, the social and business implications, and some steps being considered to control misuse. Related and interwoven fields include, but are not limited to: Nanomaterials, Nanomedicine, Nanobiotechnology, Nanolithography, Nanoelectronics, Nanomagnetics, Nanorobots, Biodevices (biomolecular machinery), AI, MEMS (MicroElectroMechanical Systems), NEMS (NanoElectroMechanical Systems), Biomimetic Materials, Microencapsulation, and many others.

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