“ nano” is derived from the greek word for “ dwarf “
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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 PresentationTRANSCRIPT
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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.
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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
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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
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Understanding EffectsCentimeter: Gravity, friction, combustionMillimeter: Gravity, friction, combustion, electrostaticMicrometer: Electrostatic, van der Walls, BrownianNanometer: Electrostatic, van der Walls, Brownian, QuantumAngstrom: Quantum mechanics
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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.
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It was thought to be only two allotropes of carbonoriginally Graphite and Diamond
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Types of Carbon NanotubesSingle-Walled Nanotubes (SWNT)Multi-Walled Nanotubes (MWNT)
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Types of Carbon Nanotubes
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Fullerenes
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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.
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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.