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“ NANO” is derived from the Greek word for “ dwarf “. • One nanometer (nm) is one-billionth of a meter, 10-9 m. is approx width of 4-5 hydrogen atoms A human hair is approximately 80,000 nm wide A red blood cell approximately 7000 nm wide. Coin 2 cm. Hair 100 m. Rain drop 1 mm. - PowerPoint PPT Presentation
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NANO is derived from the Greek word for dwarf . One nanometer (nm) is one-billionth of a meter,10-9 m. is approx width of 4-5 hydrogen atoms A human hair is approximately 80,000 nm wide A red blood cell approximately 7000 nm wide.
Nanotechnology is not a new phenomenon
The Lycurgus Cup, a stained glass cup of 4th Century A.D. (from Rome) shows green colour as reflected light and red colour as transmitted light due to the presence of Au/Ag alloy nano particles Nanotechnology is not a new phenomenon
The Lycurgus Cup, a stained glass cup of 4th Century A.D. (from Rome) shows green colour as reflected light and red colour as transmitted light due to the presence of Au/Ag alloy nano particles70 nm sized particles of silver/gold alloy as seen in an electron microscope
PerspectiveAtom 0.1 nmDNA (width) 2 nmProtein 5 50 nmVirus 75 100 nmMaterials internalized by cells < 100 nmBacteria 1,000 10,000 nmWhite Blood Cell 10,000 nmLIFE
Understanding EffectsCentimeter: Gravity, friction, combustionMillimeter: Gravity, friction, combustion, electrostaticMicrometer: Electrostatic, van der Walls, BrownianNanometer: Electrostatic, van der Walls, Brownian, QuantumAngstrom: Quantum mechanics
Nanotechnology Nanotechnology is the study, design, creation, synthesis, manipulation, and application of functional materials, devices, and systems through control of matter at the nanometer scale (1-100 nanometers, one nanometer being equal to 10A or one billionth of a meter), that is, at the atomic and molecular levels, and the exploitation of novel phenomena and properties of matter at that scale.
It was thought to be only two allotropes of carbonoriginally Graphite and Diamond
Types of Carbon NanotubesSingle-Walled Nanotubes (SWNT)Multi-Walled Nanotubes (MWNT)
Types of Carbon Nanotubes
Fullerenes
They are named after Buckminster Fuller, an architect who created geodesic dome structures, which were already famous and looked similar to C60 and other fullerenes.
Scanning Tunneling Microscope (STM)The Scanning Tunneling Microscope (STM)was developed by G. Binnig and W. Rohrer atthe IBM Research Laboratory in 1982. Theywon Noble Prize in 1986.