Nanomaterials: Synthesis and characterization-Model question paper for MTech/PhD

1(a) Explain how solvothermal reactions yield nanoparticles? (4 Marks)

(b) Explain with neat sketches the nanoparticles production method employing furnace aerosol reactor and simple spray pyrolysis reactor. (8 Marks)

(c) Write a note on reverse micelles method of nanomaterial synthesis. (4 Marks)

(d) What are the types of vacuum pumps used in vapour deposition method? (4 Marks)

2(a) Explain how nanoparticles of metal oxides are prepared by sol gel process. (6 Marks)

(b) What is magnetron sputtering? (4 Marks)

(c) Mention some materials used for the construction of balls and vials in high energy ball milling unit. (4 Marks)

(d) Distinguish between organic and inorganic nanoparticles. (6 Marks)

3 (a) Explain the characteristics of nano thin films obtained by dip method. (4 Marks)

(b) Outline the method of assembly of gold nanostructured films by colloidal templating. (8 Marks)

(c) An ideal nanomechanical bearing should possess zero static friction. Explain. (4 Marks)

(d) Explain the role of ceramic nanocomposites in artificial joints. (4 Marks)

4(a) Explain the method of synthesis of oligonucleotides from controlled pore glass. (8 Marks)

(b) Mention some advantages of electrodeposition technique. (4 Marks)

(c) Write notes on two classes of PECVD process. (8 Marks)

5(a) Explain in detail the working principle of TEM. (8 Marks)

(b) Ion beam scattering and electron diffraction are tools for surface studies of nanoparticles. Explain. (8 Marks)

(c) Write a note on X-ray photoelectron spectroscopy. (4 Marks)

6 (a) Write the merits of LabVIEW software. (6 Marks)

(b) Cryostats are required in Nanomaterials characterization. Write your comments. (6 Marks)

(c) Write a note on differential scanning calorimetry. (4 Marks)

(d) What is Debye-Scherrer formula? Explain the terms. (4 Marks)

7(a) Explain the role of phase shift masks ans photoresists in pfotolithography. (8 Marks)

(b) Write a note on pre exposure baking. (6 Marks)

(c) Mention the processes involved in LIGA. (6 Marks)

8(a) Write a note on SQUID. (6 Marks)

(b) Explain how dielectric permittivity is measured by using an LCZ meter. (6 Marks)

(c) Kiethley Picoammeter is used for dc conductivity studies. Explain. (4 Marks)

(d) What are the precautions that have to be taken during low temperature experiments using Liquid helium? (4 Marks)