Advances in Characterization Of nanomaterials

1. ADVANCEs in Characterization Of
nanomaterials

2. Characterization Techniques
Characterization and manipulation of individual
nanostructures require not only extreme sensitivity
and accuracy, but also atomic-level resolution. It
therefore leads to various microscopy that will play
a central role in characterization and measurements
of nanostructured materials and nanostructures.
 The various structural characterization methods
that are most widely used in characterizing
nanomaterials and nanostructures

3. Residual stress Analysis
Bragg Law
hkl
hkl
d 
 sin
2

hkl =
dhkl - d0,hkl
d0,hkl

4. The nano-scale in the material structure
SANS - Experimental set-up
SMALLANGLE SCATTERING OF
NEUTRONS OR X-RAY SYNCHROTRON
RADIATION
R
L
2

5. Small angle neutron scattering characterization
of Al2O3 / Ni-P nanocomposites
In the recent years there has been rapid progress in
developing a new class of composite materials, called
interpenetrating phase composites.
 Al2O3/Ni–P composite systems: paramagnetic properties,
excellent resistance to wear and corrosion, high hardness.
 The Al2O3 ceramic powder covered by metal was pressed
under high pressure (7GPa) at different temperatures (room
temperature, 600°C, 800°C, 1000°C).

6. Small angle neutron scattering characterization
of Al2O3 / Ni-P nanocomposites
(a) room temperature,
(b) 600°C,
(c) 800°C
(d) 1000°C

7. Small angle X-ray scattering
SAXS is another powerful tool in characterizing
nanostructured materials. Strong diffraction peaks result from
constructive interference of X-rays scattered from ordered
arrays of atoms and molecules.
 A lot of information can be obtained from the angular
distribution of scattered intensity at low angles. Fluctuations in
electron density over lengths on the order of l0 nm or larger can
be sufficient to produce an appreciable scattered X-ray
intensities at angles 28 < 5".

8. Nanoscale conformational ordering in polyanilines
investigated by SAXS and AFM
POEA
POMA
PANI

9. Entropically driven self-assembly of multichannel
rosette nanotubes
Samples SAXS Diameter
nm
Computed
diameter nm
1 3,60  0,66 4
1 + NaCl 4,13  0,70 4
1 + KCl 3,71  0,47 4

10. Nanobioelectronics
DNA double helices
Experiments on native-DNA charge mobility show poor
conductivity for molecules of DNA deposited on substrates.

11. Self assembled guanosine (g)-nanowires

12. X-ray Microtomography