M.Sc. DEGREE EXAMINATION, APRIL 2017.
Second Semester
Nanoscience and Technology
CHARACTERIZATION OF NANOMATERIALS
(CBCS 2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. Define Fatigue.
2. What is meant by elasticity of nanomaterials?
3. Define Electrical conductivity.
4. What is relaxation time?
5. State the laws of absorption.
6. Write down the applications of Raman spectra.
7. What is meant by exchange interaction?
8. What is chemical Shift?
9. What is the difference between SEM and TEM?
10. What is meant by Surface mapping?
Sub. Code
533202
RW-203
2
Wk 7
Part B x 5 25)
Answer all questions.
11. Explain failure stress and fracture toughness.
Or
Write short notes on Nanomembranes.
12. Explain the DC conductivity as a function of
temperature.
Or
What is impedance? Draw and explain the cole-cole
plot.
13. Explain the effect of conjugation on chromophores.
Or
Explain the principle of FTIR.
14. Draw the hysteresis loop and explain it.
Or
Explain the working of Magnetic Force microscopy
(MFM).
15. Briefly explain the principle of STM.
Or
Write a short note on Optical Microscope with
diagram.
RW-203
3
Wk 7
Part C x 10 30)
Answer any three questions.
16. Write a short note on
Micro hardness and fracture toughness
Superplasticity.
17. Describe the Hall Effect and its applications with
diagram.
18. Briefly explain
Theory of infrared absorption
Surface Plasma Resonance (SPR).
19. With neat sketch explain the principle and applications of
NMR.
20. Describe the principle, working and applications of TEM.
———————