Reg No.:

Max. Marks: 100

04000EC402052004

Pages: 1

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Eighth semester B.Tech degree examinations, September 2020

Course Code: EC402
Course Name: NANOELECTRONICS

PARTA
Answer any two full questions, each carries 15 marks.
Explain de-Broglie wavelength & Screening length in mesoscopic systems.
Explain parabolic & triangular quantum wells with neat diagrams.
Explain the process of Physical Vapour Deposition in the fabrication of nano-
layers.
Explain laser ablation.
Explain Quantum wells, wires & dots & compare each.
Explain the process of grinding with iron balls in the fabrication of
nanoparticles.
Write short notes on: i) Carbon nanotubes _ ii) Sol-gel process
PART ‏تا‎
‎Answer any two full questions, each carries 15 marks.
Differentiate between electron & optical microscope.
Explain the principle of Scanning Tunnelling Microscope with neat diagrams.
Explain X-Ray Diffraction analysis.
Write notes on Modulation doped hetero-junctions.
Explain SEM with suitable diagrams.
Compare STM and AFM.
Write short notes on PL & UV spectroscopy.
Explain the structure & energy band diagram of MOSFET.
PART C
Answer any two full questions, each carries 20 marks.
Explain the resonant tunnelling effect with neat diagrams.
Explain Coulomb blockade in nanostructures.
Derive Landauer formula for Quantum transport in nanostructures.
Explain the structure of Single electron transistor with neat diagrams.
Write short notes on i) Quantum dot Laser ii) CNT transistors.
Explain the electron Scattering mechanism for parallel transport in
semiconductor nanostructures.
Explain the structure of MODFET.
Write short notes on 1) NEMS.

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Duration: 3 Hours

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