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Messages - utpalruet

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Departments / Nanotechnology Applications: A Variety of Uses
« on: September 21, 2014, 11:32:05 AM »
The Understanding Nanotechnology Website is dedicated to providing clear and concise explanations of nanotechnology applications. Scan the listings below to find an application of interest, or use the navigation bar above to go directly to the page discussing an application of interest.
Nanotechnology Applications in:
Medicine

Researchers are developing customized nanoparticles the size of molecules that can deliver drugs directly to diseased cells in your body.  When it's perfected, this method should greatly reduce the damage treatment such as chemotherapy does to a patient's healthy cells. Check out our Nanotechnology Applications in Medicine page to see how nanotechnology is being used in medicine.
Electronics

Nanotechnology holds some answers for how we might increase the capabilities of electronics devices while we reduce their weight and power consumption. Check out our Nanotechnology Applications in Electronics page to see how nanotechnology is being used in electronics.
Food

Nanotechnology is having an impact on several aspects of food science, from how food is grown to how it is packaged. Companies are developing nanomaterials that will make a difference not only in the taste of food, but also in food safety, and the health benefits that food delivers. Check out our Nanotechnology Applications in Food page for the details.
Fuel Cells

Nanotechnology is being used to reduce the cost of catalysts used in fuel cells to produce hydrogen ions from fuel such as methanol and to improve the efficiency of membranes used in fuel cells to separate hydrogen ions from other gases such as oxygen. Check out our Nanotechnology Applications in Fuel Cells page for the details.

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Departments / What is Nanotechnology?
« on: September 21, 2014, 11:30:37 AM »
A basic definition: Nanotechnology is the engineering of functional systems at the molecular scale. This covers both current work and concepts that are more advanced.

In its original sense, 'nanotechnology' refers to the projected ability to construct items from the bottom up, using techniques and tools being developed today to make complete, high performance products.

The Meaning of Nanotechnology

When K. Eric Drexler (right) popularized the word 'nanotechnology' in the 1980's, he was talking about building machines on the scale of molecules, a few nanometers wide—motors, robot arms, and even whole computers, far smaller than a cell. Drexler spent the next ten years describing and analyzing these incredible devices, and responding to accusations of science fiction. Meanwhile, mundane technology was developing the ability to build simple structures on a molecular scale. As nanotechnology became an accepted concept, the meaning of the word shifted to encompass the simpler kinds of nanometer-scale technology. The U.S. National Nanotechnology Initiative was created to fund this kind of nanotech: their definition includes anything smaller than 100 nanometers with novel properties.

Much of the work being done today that carries the name 'nanotechnology' is not nanotechnology in the original meaning of the word. Nanotechnology, in its traditional sense, means building things from the bottom up, with atomic precision. This theoretical capability was envisioned as early as 1959 by the renowned physicist Richard Feynman.

    I want to build a billion tiny factories, models of each other, which are manufacturing simultaneously. . . The principles of physics, as far as I can see, do not speak against the possibility of maneuvering things atom by atom. It is not an attempt to violate any laws; it is something, in principle, that can be done; but in practice, it has not been done because we are too big. — Richard Feynman, Nobel Prize winner in physics

Based on Feynman's vision of miniature factories using nanomachines to build complex products, advanced nanotechnology (sometimes referred to as molecular manufacturing) will make use of positionally-controlled mechanochemistry guided by molecular machine systems. Formulating a roadmap for development of this kind of nanotechnology is now an objective of a broadly based technology roadmap project led by Battelle (the manager of several U.S. National Laboratories) and the Foresight Nanotech Institute.

Shortly after this envisioned molecular machinery is created, it will result in a manufacturing revolution, probably causing severe disruption. It also has serious economic, social, environmental, and military implications.

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Departments / Re: Friend for a healthy life
« on: September 21, 2014, 11:28:53 AM »
Yaroon dosti badi hi haseen hain...........

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Departments / Re: Should We worry about nuclear power?
« on: September 21, 2014, 11:27:28 AM »
info-containing post.

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Departments / Microelectromechanical systems
« on: September 21, 2014, 11:03:51 AM »
Microelectromechanical systems (MEMS) (also written as micro-electro-mechanical, MicroElectroMechanical or microelectronic and microelectromechanical systems and the related micromechatronics) is the technology of very small devices; it merges at the nano-scale into nanoelectromechanical systems (NEMS) and nanotechnology. MEMS are also referred to as micromachines (in Japan), or micro systems technology – MST (in Europe).

MEMS are separate and distinct from the hypothetical vision of molecular nanotechnology or molecular electronics. MEMS are made up of components between 1 to 100 micrometres in size (i.e. 0.001 to 0.1 mm), and MEMS devices generally range in size from 20 micrometres (20 millionths of a metre) to a millimetre (i.e. 0.02 to 1.0 mm). They usually consist of a central unit that processes data (the microprocessor) and several components that interact with the surroundings such as microsensors.[1] At these size scales, the standard constructs of classical physics are not always useful. Because of the large surface area to volume ratio of MEMS, surface effects such as electrostatics and wetting dominate over volume effects such as inertia or thermal mass.[citation needed]

The potential of very small machines was appreciated before the technology existed that could make them—see, for example, Richard Feynman's famous 1959 lecture There's Plenty of Room at the Bottom. MEMS became practical once they could be fabricated using modified semiconductor device fabrication technologies, normally used to make electronics. These include molding and plating, wet etching (KOH, TMAH) and dry etching (RIE and DRIE), electro discharge machining (EDM), and other technologies capable of manufacturing small devices. An early example of a MEMS device is the resonistor – an electromechanical monolithic resonator

Courtesy: Wikipedia

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Departments / Re: Cloud Computing
« on: September 21, 2014, 11:02:01 AM »
Would have been a bit more Flexible if it was a short. Thanks though for sharing.

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Departments / Re: consistency of long chain fatty acids in sperata Aor
« on: September 21, 2014, 11:00:44 AM »
Informative one.

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Seems pretty interesting.

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Departments / Re: Nanofluid and smart fluid
« on: September 21, 2014, 10:59:31 AM »
Smart-Grid is the need of the hour and is gaining wide popularity among all research topics in foreign countries.

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Departments / Re: The secret of Taj Mahal
« on: September 21, 2014, 10:57:55 AM »
quite debatable.

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Departments / Re: Shor but Effective Tips for Interviewee
« on: September 21, 2014, 10:57:18 AM »
main thing in an interview is .............don't panic and be yourself.

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Departments / Re: Laser cooling system helpful for Environment
« on: September 21, 2014, 10:56:19 AM »
Happy to hear this.

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Departments / Re: Anxiety cause high blood pressure
« on: September 21, 2014, 10:55:45 AM »
so, just shoot out anxiety from this world.

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Departments / Re: 6 Hypertension Risk Factors
« on: September 21, 2014, 10:54:16 AM »
So, we should relax and enjoy every bit of our lives.

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