It is manipulation of matter on an atomic, molecular, and super-molecular scale.
It uses a basic unit of measure called a nanometer (nm).
The nanometer scale is conventionally defined as 1 to 100 nm. One nanometer is one billionth of
a meter (10-9 m).
The concepts of nanotechnology were first discussed in 1959 by renowned physicist Richard
Feynman and the term "nano-technology" was first used by Norio Taniguchi in 1974.
Different way to visualize a nanometer Applications of nanotechnology
our fingernails grow at the rate of 1 nm It has a wide range of applications, and
per second; nanoparticles are incorporated in the
the head of a pin is about 1 000 000 nm in production of many different materials and
a human hair is about 80 000 nm in
a DNA molecule is 1–2 nm wide;
the transistor of a latest-generation
Pentium Core Duo processor is 45 nm. Energy applications of nanotechnology
Industrial applications of nanotechnology
Potential applications of carbon nanotubes
ATOMIC AND NUCLEAR PHYSICS
Atomic Physics Cathode Ray
It is the studies atoms as an isolated It consists of negatively charged material
system of electrons and an atomic nucleus. particles called electrons.
It is primarily concerned with the It deflects towards the positive plate of an
arrangement of electrons around the electric field.
nucleus and the processes by which these The charge to mass ratio (e / m) for the
arrangements change. particles in the nature of the gas taken in
The term atomic physics is often related the discharge tube.
with nuclear power and nuclear bombs. It travels in straight lines.
It can ionise the gases.
It can produce X-rays.
It is the studies the constituents and It can produce fluorescence.
interactions of atomic nuclei. It can penetrate through thin metal foils.
The most commonly known applications
of nuclear physics are nuclear power
generation and nuclear weapons It consists of positively charges material
It deflects towards the negative plate of an