Introduction to Nanoworld

1. Introduction
to
Nanoworld
and
Nanoscience


In
 such
 a
 rapid
 changing
 era
 like
 now,
 technology
 science
 is
 playing
 an
 important
 role
 of
 changing
people’s
lives.
Technology
advance
now
can
save
more
lives
and
bring
out
more
and
 more
significant
benefits
to
human
beings.
One
of
the
most
thriving
area
of
technology
in
the
 scientific
 context
 now
 is
 nanoscience,
 which
 is
 defined
 as
 an
 emerging
 area
 of
 science
 which
 studies
the
world
with
objects
that
have
very
small
dimension.

 
 It
 is
 undeniable
 that
 nowadays
 all
 sort
 of
 scientists
 (physicists,
 chemist,
 biologist,
 material
 scientist,
engineers
and
etc.)
are
studying
very
very
small
thing
in
order
to
better
understand
the
 nanoworld.
 The
 manpower
 of
 scientists
 and
 researchers
 as
 well
 as
 the
 strategic
 investment
 in
 nanoscience
 and
 nanotechnology
 in
 all
 over
 the
 world
 are
 expanding
 with
 a
 fast
 pace
 and
 extensive
 range,
 which
 has
 never
 happened
 in
 any
 other
 area
 of
 science
 and
 technology.
 Nanosciene
 studies
 the
 world
 of
 tiny
 objects,
 which
 are
 unable
 to
 be
 seen
 by
 common
 microscopes.
 Nanoscience
 looks
 into
 the
 kingdom
 of
 atoms,
 extremely
 miniature
 structure.
 In
 order
 to
 grasp
 a
 clear
 imagination
 of
 this
 world,
 it
 is
 necessary
 to
 define
 the
 scale
 of
 unit
 i.e.
 nano.
One
meter
is
used
as
a
basis:
 • 1
cm
=
10‐2
m
 • 1
mm
=
10‐3
m
 • 1
µm
=
10‐6
m
 • 1
nm
=
10‐9
m
 It
 can
 be
 seen
 that
 one
 nanometer
 is
 even
 smaller
 than
 the
 sun’s
 wavelength
 and
 one
 nanometer
 is
 only
 one
 of
 100,000
 the
 width
 of
 hair.
 Figure
 1
 shows
 us
 the
 sizes
 of
 some
 very
 small
objects,
which
provide
us
a
better
understanding
and
imagination
of
scale
of
nanoworld
 unit.

 
 However
 is
 small
 a
 nanometer,
 it
 seems
 still
 much
 larger
 than
 the
 size
 of
 an
 atom.
 An
 atom’s
 diameter
 is
 about
 1/10
 nm
 and
 atom’s
 nuclear
 is
 much
 smaller,
 with
 a
 0.00001
 nm