Download GTU B.Tech 2020 Winter 7th Sem 2173905 Electrical And Optical Properties Of Nanomaterials Question Paper

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Subject Code: 2173905

GUJARAT TECHNOLOGICAL UNIVERSITY

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Subject Name: Electrical and Optical properties of Nanomaterials

Time: 10:30 AM TO 12:30 PM

Instructions:

1. Attempt any FOUR questions out of EIGHT questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. 1. Define: Band diagram in the vicinity of nanomaterial. (03 Marks)
   2. Explain Direct and Indirect band gap in the vicinity of E-K diagram. (04 Marks)
   3. Write down various applications associated with optical thin films. (07 Marks)

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2. 1. What do mean by Plasmonic Nanomaterial? (03 Marks)
   2. Differentiate: Polar and Non-polar molecular. (04 Marks)
   3. Explain response of a pure resistor to an applied AC signal. (07 Marks)

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3. 1. What do you mean by Polarization in Dielectric Material? (03 Marks)
   2. Write short not on Electrical-Transport Properties in 2D electron gas (2DEG) nanostructure. (04 Marks)
   3. Write a shot note on ac and dc conduction mechanism in ZnO nanorods and nanotubes. (07 Marks)
4. 1. Define : Quantum Dots. (03 Marks)

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   2. Differentiate: Rayleigh scattering, Compton scattering and Photoelectric effect. (04 Marks)
   3. Explain : how to change photo response of Photo catalytic nanomaterial from UV light to visible light. (07 Marks)
5. 1. Define: Photonic Crystals and‘its colour emission (03 Marks)
   2. Write a short note on Surface Plasmon Resonance. (04 Marks)

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   3. Write a shot note on Grain boundary and its types and shows its impact on different microstructures. (07 Marks)
6. 1. Define : oxidation and reduction. (03 Marks)
   2. Explain: Importance of Microstructure. (04 Marks)
   3. Write a short note on : Photo catalytic effect. (07 Marks)

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7. 1. Define: Free radicals. (03 Marks)
   2. Explain: particle Size effect on optical properties of nanostructured materials. (04 Marks)
   3. Write a short note on operating and affecting Parameters of Photo catalysis. (07 Marks)

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8. 1. Define: Homogeneous Photo catalysis. (03 Marks)
   2. Explain : Metallic nanoparticles and its optical properties. (04 Marks)
   3. Write a short note on photo catalytic activity of TiO2. (07 Marks)

Date: 28/01/2021

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Total Marks: 56

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