Download GTU BE/B.Tech 2019 Summer 4th Sem New 2143902 Physics Of Nanomaterials Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 4th Sem New 2143902 Physics Of Nanomaterials Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?IV(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2143902 Date:15/05/2019
Subject Name: Physics of Nanomaterials
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.


MARKS

Q.1 (a) What is Lattice and Lattice point? 03
(b) Explain Direct and Indirect Band Gap in Semiconductor. 04
(c) Write a short note on Energy Band Gap in Solids. 07

Q.2 (a) Define Chiral Vector in Carbon Nanotube. 03
(b) Explain types of CNTs. 04
(c) Write a short note on Carbon Nanotubes. 07
OR
(c) Describe Unit Cell, Chiral Angle, Chiral Vector of CNTs. 07
Q.3 (a) What is Type I Hetero Structure? 03
(b) What is Type II Hetero Structure? 04
(c) Describe Classification of Quantum Confined System. 07
OR
Q.3 (a) Define Reciprocal Vectors. 03
(b) Explain Reciprocal Lattice. 04
(c) Describe Brillouin Zone. 07
Q.4 (a) What is Spherical Cluster Approximation? 03
(b) Describe Interior and Exterior Surface Area. 04
(c) Explain Surface to Volume Ratio with Diagram. 07
OR
Q.4 (a) Define Quantum Confinement Effect. 03
(b) Explain 2D, 3D Nanomaterials with Examples. 04
(c) Write a note on applications of Carbon Nanotubes. 07
Q.5 (a) What is Reciprocal space? 03
(b) Explain Photonic Crystal. 04
(c) Write a note on Hetero Structures. 07
OR
Q.5 (a) What is Quantum well, Quantum wire, Quantum dot? 03
(b) Describe type of Excitons and Binding Energy. 04
(c) Write short note on Excitons. 07
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