Nanometre - a unit of measurement for length in
physics, is one-billionth of one metre (10-9m). Its
dimension is about the same as that of an atom or a
molecule and metaphorically. When conventional
materials are being sub-divided by technology to
such an extent, its materialization could manifest
in great changes as its massive potential energy is
highly active and has possibilities beyond
imagination. This is what has always been referred
to as quantitative change to qualitative change?
The fundamental definition of Nanotechnology is that
in a microenvironment that is within the dimension
of one nanometre, the ability of man to understand
and change nature shall be elevated to the atomic
and molecular level. Through direct manipulation and
rearrangement of the atom, the molecule, the atomic
clusters or molecular groups such that they are
re-assembled, re-aligned to create new substances or
products under this new and advanced technology.
Many in the scientific world have concluded,
nanotechnology is the key to scientific developments
in the twenty-first century. It is a revolution of
technology and will be the revolution of industries
too. The effects to mankind brought about by
Nanotechnology shall be as profound and lasting as
that of the industrial revolution, the technology
revolution, and the development of antibiotics and
nuclear weapon.?
A Better Understanding on Nano or Nanometre
Nano or Nanometre is a unit of length in physics. 1
nanometre (nm) equals 10-9 metre (1 millimetre
equals 10-3 metre, 1 micrometre equals 10-6 metre)
i.e. one over one million millimetre, one over one
billion metre. To put it in a visual analogy, 1nm is
about the diameter of a hair divided by a hundred
thousand or, a nanometre-sized particle placed on a
ping pong ball is equivalent in proportion to a ping
pong ball placed on the Earth. We are unable to see
such a tiny particle with naked eyes. This scale is
equivalent to the atomic and molecular scale, which
is often mentioned by people.
Application and Development of Nanotechnology in the
world
Many countries have acquired breakthrough results in
Nanotechnology research and development in varied
fields. The series of achievements below clearly
indicate that the advent of Nanotechnology will more
than just initiate a new age of science and
technology; it will become the mainstream technology
in the 21st century.
Modern quantum elementary device and quantum lattice
which are made by Nanotechnology surpass the limit
of microelectronics. US had already successfully
developed transistors of 6nm in size. And single
electron transistors developed by American IBM
Corporation and Japanese Hitachi Corporation has
realized single electron control. According to the
statements of authoritative experts, the precision
of elementary device processing of the electronic
industry in the whole world has already reached
around the range 100 nanometres.. This signals that
the global electronic industry has taken the lead to
enter the Nano era. Nanometre stealth material
"super black powder" developed by US can absorb 99%
of radar wave and promoted the stealth technology
development. A mini engine developed by US is
astonishingly small that 1,000 of which can be
contained in a 5 cubic centimetres small box. A
helicopter, of only the size of hornet, made by
Germany can lift off and fly. England recently
produced the world抯 first robot to be on the Nano
scale. China's Tsing-Hua University used the
characteristics of strong binding force between Nano
granular material and biological cells, to develop
nano artificial bone? successfully implanting it
into patient's body and with very good clinical
effects. In brief,
Nanotechnology will give full play in six main domains in the near
future, namely biotechnology, medical health care,
astronautics, energy research, electronics and
agriculture. Nanotechnology is closely related
to human. It will certainly initiate a new
industrial revolution in the world and generate
significant benefits to mankind.
:: Nano Material
What is Nano Material?
It is a material consisting of ultra micro grains,
its compact aggregates and Nano micrites between the
scale of 1 to 100nm. Nano material has extremely
broad prospect for application in various fields.
What are the characteristics of Nano Material?
Nano material contains completely different sets of
characteristics from conventional material. For
example, Nano semiconductor material consists of
energy gap splitting structure; Nano Iron material
possesses very strong magnetization; conventional
non-conducting material can be converted into
conducting Nano material; other characteristics
include unique far infrared emission, strong
ultraviolet reflection, strong absorbability, strong
catalytic effects etc. Scientists predicted that
21st century would be the nano era? an industrial
revolution.
|
