B.TECH - Semester 8 nanoelectronics Question Paper 2021 (feb)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- Explain laser ablation method for nano particle fabrication.
- Consider an electron having kinetic energy 5 eV and effective mass $0.511 \mathrm{~m}_{0}$. Calculate its De-Broglie wavelength. If the size of the mesoscopic structure having the electron is in the range of $2 \times 10^{-14} \mathrm{~m}$, will it f...
- DC sputtering cannot be used for coating of non-conducting materials. Justify. Explain how RF sputtering overcome this advantage.
- Explain the different scattering events encountered by a carrier during parallel transport under the influence of electric field.
- Explain Shubnikov - de Hass effect.
- Differentiate between multiple quantum wells and super lattice.
- Illustrate resonant tunneling effect. P.T.O.
- MODFETs are high electron mobility transistors. Justify.
- Explain the working of a quantum dot Laser.
- Explain the principle of carbon nanotube transistors. Answer any two questions from each module. Each question carries 10 marks.
- Explain the Sol — Gel process for fabricating different types of nanomaterials.
- Illustrate the principle of operation of a TEM. Explain the different imaging modes in TEM.
- Explain any two physical vapour deposition processes, with the aid of diagrams. $$ (2 \times 10=20 \text { Marks) } $$
- Show that density of states in a 2D material is independent of energy.
- Explain Kronig- Penny model of a super lattice. Explain the concept of zone folding.
- Explain (a) Aharonov Bohm effect.
- Explain (b) Quantum Hall effect. $$ (2 \times 10=20 \text { Marks) } $$ 17．Explain the conditions to be fulfilled in order to observe single electron effect． Explain the principle of operation of a quantum dot based single electron transistor． 18．...