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H1129 Pages: 2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
EIGHTH SEMESTER B.TECH DEGREE EXAMINATION, MAY 2019

Course Code: ME468
Course Name: Nanotechnology

PARTA

Answer any three full questions, each carries 10 marks.
Explain the concept of super lattices structure of material?
What is mean by nano clusters?
Explain in detail the concept of quantum dots and quantum wells.
What is miniaturization? What are the challenges involved in it?
What are the important mechanical properties of material at nano level? Explain
any four in detail.
Define size effect. Describe it in detail with respect to thermal properties of
materials.

PART ‏تا‎

Answer any three full questions, each carries 10 marks.
What are the advantages and limitations of PVD techniques?
What are the different types of reactors used in CVD process?
Compare the working of Scanning Electron Microscope and Transmission
Electron Microscope.
Why objects in nanoscale cannot be seen by visible light? How do we
characterize nanostructures ?
With a neat sketch explain the working of Molecular Beam Epitaxy fabrication
technique.

Describe the working of atomic force microscope. What are the precautions
required while operating AFM?
PART C
Answer any four full questions, each carries 10 marks.
Explain the concept of nano-biosensors.
What is smart dust?
What is meant by single walled and multiwalled Carbon Nano Tubes.

Explain the following : (a) Nano composites (b) Nano crystalline materials

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Duration: 3 Hours

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