nano technology Definition and Topics - 11 Discussions

Nanotechnology, also shortened to nanotech, is the use of matter on an atomic, molecular, and supramolecular scale for industrial purposes. The earliest, widespread description of nanotechnology 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 defined 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 which occur below the given size threshold. It is therefore common to see the plural form "nanotechnologies" as well as "nanoscale technologies" to refer to the broad range of research and applications whose common trait is size.
Nanotechnology as defined by size is naturally broad, including fields of science as diverse as surface science, organic chemistry, molecular biology, semiconductor physics, energy storage, engineering, microfabrication, and molecular engineering. The associated research and applications are equally diverse, ranging from extensions of conventional device physics to completely new approaches based upon molecular self-assembly, from developing new materials with dimensions on the nanoscale to direct control of matter on the atomic scale.
Scientists currently debate the future implications of nanotechnology. Nanotechnology may be able to create many new materials and devices with a vast range of applications, such as in nanomedicine, nanoelectronics, biomaterials energy production, and consumer products. On the other hand, nanotechnology raises many of the same issues as any new technology, including concerns about the toxicity and environmental impact of nanomaterials, and their potential effects on global economics, as well as speculation about various doomsday scenarios. These concerns have led to a debate among advocacy groups and governments on whether special regulation of nanotechnology is warranted.

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    A Molecules Aggregating on a Surface that includes a Scratch

    View from above of fused silica chip. In the image is fused silica and the black line is burned fused silica caused by laser, when I cast droplet that contains molecules, never mind which kind of aggregation I tried different kinds of molecules, the aggregation is more preferably on the burned...
  2. C

    Re: The electrical excitation of quantum dots

    We most often witness the presentation of quantum dots in viles or containers which are excited via UV light. I am more interested in their electrical excitation. Could I simply take a sample of QDs from one of those viles and passing an electrical current through that sample excite the...
  3. D

    A About nonhermiticity in plasmonic dimers

    My questions are related to the article "Self-hybridization within non-Hermitian localized plasmonic systems" I am aware that within the nanophotonics field, the use of precisely engineered nanoparticles in space and time leads to arrays in the...
  4. A

    I Fluorescence from core shell quantum dots

    What is the reason for enhancement in the intensity of emission due to the introduction of a shell in quantum dots? I do understand the blue shift in quantum dots but how does a shell enhance it?
  5. Kunal Aggarwal

    How to prepare PLGA nanoparticles?

    What is the protocol used to prepare poly (lactic-co-glycolic acid) (PLGA) nanoparticle? What are the different methods of producing it?
  6. Kunal Aggarwal

    Medical How nanotechnology has affected treatment of tuberculosis?

    To be more precise, which nano particles are being used or can be used to deliver tuberculosis drugs in the human body?
  7. AD MCFC

    Engineering BS Physics to Materials Science Graduate Advice/Thoughts

    Hello All, I am currently a junior in physics and have set sights on Materials Science (Electronic Materials/Nanotechnology) for grad school. My school does not offer MS.Eng as a degree and so the only Materials Science course I can enroll in as the general "Introduction to Materials Science...
  8. N

    Thermal conductivity of a thin film

    Homework Statement The problem is given. Homework Equations The Attempt at a Solution I tried to solve the question as if there is a nanowire between two reservoirs and got an answer. But I don't know what should I do to measure thermal conductivity in a thin film. My formula for k in a...
  9. N

    Biology A Career in nanomedicine

    I would like to do research on nano medicine such as creating drug delivery systems and smart drugs i need to know what kind of bachelor i should do and which universities offer the best research in this area in America and how to progress from the bachelor to a full time researcher ?
  10. N

    Nanotechnology -- is it worth it?

    i'm interested in studying nanotechnology at La trobe University and i want to know whether this is a good degree and whether i can do an engineering degree for my masters ?
  11. P

    Why carbon is used in nano technology?

    Hello, I would like to know that why carbon is used in nano technology to build nano tubes and other? Is there any other metal which is used to construct the devices of nano technology?