M.Sc. (Electronics) (Semester-IV) New (CBCS) Examination, 2017
NANOELECTRONICS
Day Date: Monday, 24-04-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions Answer five Questions.
Question 1 and 2 are compulsory.
Attempt any Three from Q.3 to Q.7.
Figures to the right indicate full marks.
Q.1 Choose correct answer: 08
The Coulomb Blockade voltage is…………
In between-e/2C and Greater than P
Less than Equal to
The DOS for 2DEG System exhibits…. Shaped energy
dependence.
Triangular Parabolic E
Staircase Line
The transistor having 100nm dimensions obeys…… principle
Quantum Classical physics P
Both a b None of these
The OLED's are an electroluminescent organic material
between two….. of different work functions.
Semiconductors Nonconductors P
Insulator Conductors
The hetero-junctions are based on….. row compounds.
III-IV IV-V P
III-V IV-III
The split gate technique is used to ….. the electron gas
dimentionality.
Increase Decrease
Equal Non of these
The transistor based on hot electron is called….. transistor.
Hot hole Hot P
Hot electron Electron
The barrier height of the potential square well for holes is ….
And electrons is…..
Page 2 of 2
0.4eV, 0.2eV 0.2eV, 0.4eV P
1.4eV, 0.2eV P.4eV, 1.2eV
State True of False: 06
The immersion lithography is currently considered for 32nm
chip.
The multiple quantum wells are formed by single
quantum well.
The OLED does not requires a backlight a well as filter.
If then it stands for quantum well.
The organic semiconductor has Van-der-wall bonds.
The modulation doped hetero-junctions gives high frequency
transistors, MODFET.
Q2 Attempt two (Short Questions): 10
Explain the advantages of nanoelectronics over
microelectronics.
Discuss in short the quantum well, wire ad dots considering
the lengths.
Discuss the concept of superlattice.
Explain the modulation doped quantum wells. 04
Q3 Explain in detail basic properties of two-dimensional
semiconductor nanostructures.
09
Write a note on quantum wire. 05
Q4 Explain the fabrication methods of nanomaterials. 09
Explain any three characteristics length in nanostructures 05
Q5 Explain in detail Heterojunctions. 09
Write a note on resonant tunneling effect. 05
Q6 What do you mean by tunneling effect and tunneling elements. 09
Write a note on organic semiconductor. 05
Q7 Explain details Single Electron Transistor. 09
Write a note on OLED 05