MSE 352 (2014): HW #4 (Keys)
1.
Please answer the following:
a. What is conjugated polymer?
A. Polymer with a back bone consisting of alternative single and
double bonds
b. What are HOMO and LUMO?
A. HOMO refers to the highest occupied molecular orbital a
MSE 352 : HW #3 (2014) (Keys)
[1] Using the Kroger Vink notations, write:
a. Vacancy on the Zr ion sublattice in ZrO2
b. For Y2O3 stabilized ZrO2 system, Y ion in Zr ion site
c. For addition of CaO to ZrO2, Ca site
d. Possible defects in ZrO2
e. A mass ba
MSE 352 (2014) HW #2 (keys)
(1)
a.
What is the range of energy in eV for visible light?
The wavelength range of visible light is 400 nm700 nm. The corresponding
energy could be calculated as:
c
1240
c
1240
c
1240
E=h =
E max = h =
= 3.1 eV E min = h =
=1
MSE 352 (2016) HW #3
(Due Monday April 25; SelfGrade due on Wednesday April 27)
1. Shown below are a series of experimentally determined valance band spectra obtained
from CuAu and AuAg alloys. Assess how you see the color of each composition when
MSE 352 (2016) HW #1
(Due Wednesday April 6; SelfGrade due on Friday April 8)
(1) Verify that the units of Density of State and Population Density are both [#/eV].
The unit of Polulation density is still [#/eV].
(2) Briefly explain why the electronic
MSE 352 (2016) HW #2
(Due Friday April 15; SelfGrade due on Monday April 18)
1. Derive the exact forms of Density of State (DOS) for 2D and 1D cases.
Please do so by yourself. Good exercise!
2. Qualitively describe why the light emission from the qua
MSE 352 (2014) HW #1 (Keys)
Consider the following three semiconducting materials, (a), (b) and (c), whose energy band diagrams (i.e. Ek
diagrams) are shown below:
(1). Indicate the points for the top of valence band and bott
Quiz #1 from Jan 3 lecture
(1).
What is the channel length in recent MOSFET structure?
See below.
Channel length is shrinking year by year, approaching to 10nm.
(2).
How many atoms are lining up in the channel?
Atomic size of Si is 2.2 or 0.22nm (you need
MSE 351 Practice Exam for MidtermI
SOLUTIONS
[1] Express the following quantities using m(mass), x(coordinate or position) and t(time)
!
!
dx
(a) Momentum p = m0
dt
!
!
!
d 2 x dp
=
(b) Force acting on the electron F = m0
dt 2 dt
! 2
! 2
1 ! dx $ ( p)
(c
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LINEAR VISCOELASTICITY
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Quiz #2 from Jan 6 lecture: Solutions
(1). What does the de Broglies relation do?
The de Broglis relation links between wave and particle natures of the
matter through the equation, h/ = p, where h is a Planks constant.
(2). Calculate the de Broglies wave
MSE362 Sp 2017 Midterm # 1 review sheet
Midterm Exam: Monday May 1 Closed book Closed notes
All necessary equations and constants will be given except those noted below
Types of Mechanical behavior
Elastic; Elastic Plastic; ViscoElastic
Effect of strain
1
MSE 352 (2014) Semiconductor Junctions Supplement Materials
WORKFUNCTION
The normal reference point for energies within a solid is the Fermi level, Ef. Outside the
solid, however, the natural zero of energy is the vacuum level, Ev, which is the energy
MSE 352 (Spring2014)
Functional Properties of Materials
[5] Inorganic vs Organic Electronics
1.
2.
3.
4.
5.
6.
7.
Comparison of Inorganic versus Organic SC
Ordered vs Disordered Materials
Brief History of Polarons
Small Polarons
Transport in Disordered L
MSE 352 (Spring2014)
Functional Properties of Materials
[8] Electronic and Ionic Conductivity
ReviewFrom170(Chap#12)and/orMSE351(lect#5)
OhmsLaw
V=IR
resistance
voltagedrop current
(ohms,)
(volts,V)
(amps,A)
E:electric
field
(V/m)
V=IR
A
=
L A L
E=J
resi
MSE 352 (Spring2014)
Functional Properties of Materials
[10] Thermal Properties of Materials
How does a material respond to heat?
How do we define and measure.
heat capacity
coefficient of thermal expansion
thermal conductivity
thermal shock resist
3.1 Defect Equilibrium
For each case we have an accepted notation based on the following format
B
XA
Here X is the species involved, for instance, a cation, would be M, an anion would be O
in our system MO, and an impurity would be the Atom symbol for wha
MSE 352 (Spring2014)
Functional Properties of Materials
[9] Superconductivity
Reading assignment
p. 729740:
Superconductivity
Metals and Current
V = IR
Finite resistance
Wires radiate power away as heat
You pay for more electricity than you receive!
11
Point Defects, Charge, and Diffusion
CHAPTER PREVIEW
Point defects are particularly important in ceramics because of the role they can play in determining the properties of a material. The entire semiconductor industry is possible because of
minute con