25-02-2011, 10:07 AM
NT.ppt (Size: 1.77 MB / Downloads: 385)
NANOTECHNOLOGY
what is Nanotechnology
technology is the useage and knowledge of tools, techniques or crafts or methods
an area of science, research and technology concerned with extremely small things
the study of controlling of matter on atomic or molecular scale
the future of manufacturing technology based on manipulation of materials at the nano level
Objects In Nano-Scale
DEFINITION
a process by which the ability to manipulate individual atoms and molecules is developed
Concepts of NT
Concept behind Nanotechnology
NT is the concept of engineering functional mechanical systems at the molecular scale.
building machines at the molecular scale designed and built atom-by-atom.
process by which the ability to manipulate individual atoms and molecules might be developed.
History
first found in “There's Plenty of Room at the Bottom" a talk by physicist Richard Feynman.
NT and nanoscience started in the early 1980s with Cluster Science and Scanning Tunneling Microscope (STM).
Fullerenes in 1985 and Carbon Nanotubes later.
Nano crystals, quantum dots and Atomic Force Microscope in the early 90’s.
Current Research
Study of nanomaterials.
Bottom-up approach methods : arranging smaller components into more complex assemblies.
Top-down approach methods : creating smaller devices by using larger ones to direct their assembly.
Applications
Medicine
Chemistry and environment
Energy
Information and communication
Heavy Industry
Consumer goods
Implications
Potential risks of NT can broadly be grouped into three areas:
Health issues - the effects of nanomaterials on human biology
Environmental issues - the effects of nanomaterials on the environment
Societal issues - the effects that the availability of nanotechnological devices will have on politics and human interaction
NT And Computer Science
University of California at Santa Barbara (UCSB) researchers have developed new nanoscale structures that will help to speed up computers.
creating more powerful microprocessors that will use less energy.
block co-polymer lithography techniques
Nano-RAM, novel semiconductor devices
novel optoelectronic devices, displays (carbon nanotubes), Quantum computers