GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (NEW) EXAMINATION - WINTER 2017
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Subject Code: 2182114
Subject Name: Thin Film and Nano-Technology (Department Elective)
Time: 02:30 PM TO 05:00 PM
Date: 15/11/2017
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| MARKS | ||
|---|---|---|
| Q.1 | (a) Explain why materials behave so differently at nanoscale? | 03 |
| (b) Describe applications of nanotechnology. | 04 | |
| (c) What is carbon nanotube? Write a note on carbon nanotubes. | 07 | |
| Q.2 | (a) What is physical vapour deposition technique for nano-material production? Give the advantages of this method. | 03 |
| (b) Describe the effect of grain size on mechanical properties of nano structured materials. | 04 | |
| (c) Explain the sol-gel technique for nano-material production. Give advantages of this method. | 07 | |
| OR | ||
| (c) Describe the sputtering method for nanomaterial Preparation. | 07 | |
| Q.3 | (a) Explain how Multicomponent deposition is carried out in PVD. | 03 |
| (b) What is vapor deposition? Justify role of vacuum in vapor deposition. | 04 | |
| (c) Explain sputtering method of Physical vapour Deposition. Give Mechanism of Sputtering. | 07 | |
| OR | ||
| Q.3 | (a) Describe sputtering yield. | 03 |
| (b) What is chemical vapour Deposition? Write function and name of career gas in CVD. | 04 | |
| (c) Describe the Plasma Enhanced chemical vapor deposition (PECVD) Method of thin film preparation. | 07 | |
| Q.4 | (a) Describe the difference in thick film and thin film. | 03 |
| (b) Describe the novel properties of thin films. | 04 | |
| (c) Explain the nucleation and growth mechanism of thin films. | 07 | |
| OR | ||
| Q.4 | (a) Describe the term nanocrystals. | 03 |
| (b) Explain how condensation is useful in thin film preparation. | 04 | |
| (c) What do you mean by thin film? Explain the method used to measure thin film thickness. | 07 | |
| Q.5 | (a) Give the examples & applications of Nanomaterials used as Cosmetic products. | 03 |
| (b) Give a detailed classification of Nano materials with examples of each. | 04 | |
| (c) Describe the Gas Condensation Technique for Ultrafine Nano Particle production. | 07 | |
| OR | ||
| Q.5 | (a) Give the factors affecting mechanical alloying technique for nano-material production. | 03 |
| (b) “Bottom-up technique is more convenient for nano fabrication” justify. | 04 | |
| (c) Describe the plasma deposition process for Nano Particle production. | 07 |
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