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Summary Nanomaterials and their Spectroscopic Characterization
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Nanomaterials and their Spectroscopic Characterization
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Nanomaterials and their SpectroscopicCharacterization
0.22
m
Fullerenes
C60
22
cm
10 millions
times
smaller
1 billion
times
smaller
What is Nanoscale?
12,756 km
1.27 × 107
m
0.7 nm
0.7 × 10-9 m
#
(From the Ancient Greek νάνος,
nanos, "dwarf")
What is nanomaterial?
2
Nanoscale : generally refers to the size scale of 1 – 100
nm in at least one dimension.
1 nanometer (nm)
,=
10-9 m
It is a million times smaller than the smallest measurement you can see on a
ruler !!!!!
1
Prof. Richard Feynman (Physics) first
developed the concept 'nanotechnology'
(but he did not specifically use this term)
in a talk “There's Plenty of Room at the
Bottom,” given at an American Physical
Society meeting at Caltech on December
29, 1959.
The Nobel Prize in Physics 1965 was awarded
jointly to Sin-Itiro Tomonaga, Julian Schwinger and
Richard P. Feynman
Topic: "for their fundamental work in quantum
electrodynamics, with deep-ploughing
consequences for the physics of elementary
particles".
History of Nanotechnology
Why can’t we manipulate materials atom by atom?
Why can’t we control the synthesis of individual
molecules?
Why can’t we write all of human knowledge on the head of
a pin?
Why can’t we build machines to accomplish these things?
"Nano-technology' mainly consists of the processing of
separation, consolidation, and deformation of materials
by one atom or one molecule.
Prof. Norio Taniguchi
Tokyo University of Science.
, He coined the term Nano-technology in 1974
History of Nanotechnology
In the 1980s, Dr. K. Eric Drexler
(American Engineer), promoted nanoscale
phenomena through books:
Engines of Creation: The Coming Era of
Nanotechnology
Nanosystems: Molecular Machinery,
Manufacturing, and
Computation
He was ultimately responsible for the term
nanotechnology to acquire its current sense.
The stunning Lycurgus cup (1600 years old) reveals
a brilliant red when light passes through its sections
of glass containing gold-silver alloyed nanoparticles.
Photograph: British Museum Images
#
#
What is so special about
nanotechnology?
First, Nanomaterials have a relatively larger surface area when
compared to the same mass of material produced in a larger
form.
Nano particles can make materials more chemically reactive
and affect their strength or electrical properties.
#
Future: Humanoid Shaped
Nanorobots!
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