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DEFIITION OF NANO TECH..
Nanotechnology is the study, manipulation and use of matter at an ultra-minute scale.
The prefix 'nano' originates from the Greek word meaning dwarf.
One nanometre is one billionth of a metre or one millionth of a millimetre and is tens of thousands of times smaller than the width of a human hair.
The term nanotechnologies is used to refer to the different potential applications of this technology.
nanometre is s, about 1/80,000 of the diameter of a human hair, or 10 times the diameter of a hydrogen atom.

The United States' National Nanotechnology InITIATIVE defines it as follows:

"Nanotechnology is the understanding and control of matter at dimensions of

roughly 1 to 100 nanometers, where unique phenomena enable novel applications."

HISTORY OF NANO :
-NANO technology is building machines one atom at a time
-first described by Nobel laureate physicist Richard Feynman
-in 1959 he gave  a lecture called "There's plenty of room at the bottom" in which he suggested that the laws of physics would allow people to use small to make smaller machines eventually onto the atomic level
In 1981 the first journal article was written about nanotechnology titled “Protein Design as a Pathway to Molecular Manufacturing” in which explains the components of molecular robotics.
 

WHAT IS HISTORY OF NANO TECHNOLOGY ?
THE scientific community generally attributes the first acknowledgement of the
importance of the nanoscale range to the brilliant Nobel Laureate physicist Richard Feynman
in his famous 1959 lecture “There's Plenty of Room at the Bottom” in which he first proposed that the properties of materials and devices at the nanometer range would
present future opportunities. The term reached greater public awareness in 1986 with the publication of “Engines of Creation: The Coming Era of Nanotechnology” by Eric Drexler.

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