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Describe some examples observed in nature of Nanotechnique.

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The concepts that seeded nanotechnology were first discussed in 1959 by renowned Physicist Richard Feynman in which he described the possibility of synthesis via direct manipulation of atoms.

Nanotechnology is the engineering of functional systems at the molecular scale. One nanometer (nm) is one billionth or 10-9, of a meter. By comparison, typical carbon-carbon bond lengths or spacing between these atoms in a molecule are in the range 0.12 – 0.15 nm and a DNA double-helix has a diameter around 2 nm. On the other hand, the smallest cellular life forms, the bacteria of the genus Mycoplasma are around 200 nm in length. By convention, nanotechnology is taken as the range 1 to 100 nm following the definition used by the National Nanotechnology Initiative in the US. The lower limit is set by the size of atoms (Hydrogen has the smallest atoms, which are approximately a quarter of a nm diameter) since nanotechnology must build its devices from atoms and molecules. Nanofibers are used in several areas and in different products, in everything from aircraft wings to tennis rackets. Inhaling airborne nanoparticles and nanofibers may lead to a number of pulmonary diseases eg. fibrosis

Nanostructers in nature : Average height of a man 1750,000,000 nm is too long compared to human hair with a diameter 50,000 nm. The size of red blood cells and E-coli bacteria are 5000 nm and 2000 nm respectively. Transistor printed an IC is around 90 nm and size of virus is about 50 nm. The width of a typical DNA is around 2.0 nm.

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