Download GTU B.Tech 2020 Winter 7th Sem 2170508 Nano Technology Question Paper

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Subject Code: 2170508

GUJARAT TECHNOLOGICAL UNIVERSITY

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Instructions:

1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

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1. (a) List the methods used in nano synthesis. (03 MARKS)
2. (b) In what manner nano material differ from the bulk material ? List the property that improved or deprived at nano scale compare to bulk material. (04 MARKS)
3. (c) Define the nano material? Classify the nanostructured materials with suitable example. (07 MARKS)

Q.2

1. (a) What is band gap? How it differ in bulk material and nano material? (03 MARKS)

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2. (b) Differentiate between RF sputtering and DC sputtering. (04 MARKS)
3. (c) Explain the process of etching. Compare the dry etching and wet etching. (07 MARKS)

Q.3

1. (a) What is Nano-lithography? Discuss the step involved in it. (03 MARKS)
2. (b) Write in brief about application of nano material as a sensor and catalyst. (04 MARKS)

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3. (c) Explain the hydrothermal and solvo thermal methods for nano synthesis. How they differ from each other? (07 MARKS)

Q.4

1. (a) What do you understand by Precursors? What is the role of precursor in nano synthesis. (03 MARKS)
2. (b) Differentiate Co-precipitation and precipitation method for making Nano-particles. (04 MARKS)
3. (c) Explain the gas-phase synthesis of semiconductor nano particles. (07 MARKS)

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Q.5

1. (a) Differentiate between graphite and graphene? Write the application of grephene oxide (03 MARKS)
2. (b) Discuss the any one method involving top-down approach for nano synthesis. (04 MARKS)
3. (c) State general methods of preparation of quantum dots and illustrate any one in details. (07 MARKS)

Q.6

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1. (a) State and explain the principle of Scanning Electron Microscopy. (03 MARKS)
2. (b) Discuss the any one method involving bottom-up approach for nano synthesis. (04 MARKS)
3. (c) Discuss the principle and applications of vapor condensation method for nano materials synthesis. (07 MARKS)

Q.7

1. (a) Explain the application of UV/Visible Spectroscopy. (03 MARKS)

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2. (b) State the different aspects of crystallite information that can be investigated using SEM or TEM? (04 MARKS)
3. (c) Discuss principle of X-Ray Diffraction. How the XRD is used for the characterization of nano material. (07 MARKS)

Q.8

1. (a) Discuss briefly the application of nanotechnology in cosmetics. (03 MARKS)
2. (b) Discuss the application of nanotechnology in Food and agricultural industries and effective water management (04 MARKS)

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3. (c) Explain the principle, working and construction of Atomic Force Microscopy. (07 MARKS)

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