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

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2173905 Electrical And Optical Properties Of Nanomaterials Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2173905 Date:28/01/2021
Subject Name:Electrical and Optical properties of Nanomaterials
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1 (a) Define: Band diagram in the vicinity of nanomaterial.
03

(b) Explain Direct and Indirect band gap in the vicinity of E-K diagram.
04

(c) Write down various applications associated with optical thin films.
07


Q.2 (a) What do mean by Plasmonic Nanomaterial?
03

(b) Differentiate: Polar and Non-polar molecular.
04

(c) Explain response of a pure resistor to an applied AC signal.
07




Q.3 (a) What do you mean by Polarization in Dielectric Material?
03

(b) Write short not on Electrical-Transport Properties in 2D electron gas (2DEG)
04
nanostructure.

(c) Write a shot note on ac and dc conduction mechanism in ZnO nanorods and
07
nanotubes.




Q.4 (a) Define : Quantum Dots.
03

(b) Differentiate: Rayleigh scattering, Compton scattering and Photoelectric
04
effect.

(c) Explain : how to change photo response of Photo catalytic nanomaterial from
07
UV light to visible light.
Q.5 (a) Define: Photonic Crystals and its colour emission
03

(b) Write a short note on Surface Plasmon Resonance.
04

(c) Write a shot note on Grain boundary and its types and shows its impact on
07
different microstructures.



Q.6 (a) Define : oxidation and reduction.
03

(b) Explain: Importance of Microstructure.
04

(c) Write a short note on : Photo catalytic effect.
07
Q.7 (a) Define: Free radicals.
03

(b) Explain: particle Size effect on optical properties of nanostructured materials.
04

(c) Write a short note on operating and affecting Parameters of Photo catalysis.
07



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

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