Information, Signal, and Message
In the phonograph, we can also identify the quantities:
Signals: the original sound waves, the mechanical vibration of the recording stylus, the pattern on the
wax cylinder, the mechanical vibration of the playback stylus,
What Makes Engineers Different from Scientists?
Primary purpose of science and math is to help humans understand and describe our world How do
cells divide? What makes objects fall to the ground? What are the basic building blocks of life?
What is the di
Information, Signal and Message
Information is defined as knowledge communicated or received concerning a particular fact .
A signal is the actual entity (electrical, optical, mechanical, etc.) that is transmitted from sender to
receiver. Example: When yo
UConn ENGR4243 ECE4243/6243
Solution Set 8
10162014 F. Jain
Q.1 Nanotubes are seamless cylinders obtained by rolling a one dimensional grapheme sheet as
shown below in Fig. 1. The lattice is a honeycomb structure representing one layer of
crystalline grap
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ENGR4243
Fall 2015
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ENGR-ECE4243/6243 HW#6 October 20, 2014 due in one week
F. Jain
Q.1. Briefly describe the following methods of growing nanowires using:
(1) VLS and SLS nanowire growth technique using gold nanodots,
(ii) Electro-spinning method,
(iii) Templating nanowire
UConn ENGR-ECE 4243/6243 Solution Set 5
10052015 F. Jain
Photon absorption and solar cells, photon emission and LEDs,
Q1 Figure 1 shows two 10.0 m thick Si and GaAs samples illuminated by a 10 mW photon
source. Assume the source to be monochromatic and em
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UConn ECE4243 HW3/soluti0ns, Review of p—n junctions/heterojunctions, 09/15/2015 F. Jain
Q. 1 (a) Fig. 1 shows a p—n junction under equilibrium. Find junction width W0 and its components
Xno and xpo.
(b) Draw the junction boundaries for a forward biased p
UCONN ENGR-ECE4243/6243
levels
Solution HW# 2 Finite barrier quantum well energy
9/22/15, F. Jain
Q. 1. (a) Determine the electron and hole (both light and heavy) energy levels and
wavefunctions in the well of an AlxGa1-xAs-GaAs multiple quantum well laye
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Nanofet Example:
Q.5.(a) Outline the steps used in scaling a FET from 1.3 micron to 0.25 micron is described in
Baccarani et al (1984 paper distributed in class April 21, see Table I). Pages 606-614.
(b) Scale down a 0.25 micron FET to design the 0.025 mi
ECE/UConn ENGR ECE4243-6242 HW #11: Solar Cells-I F.C. Jain 11/17/2015 (due
12/03/2015 after Take Home). See Solution set on solar distributed before. Submit only Q.6 first.
HINT: Go over solved Examples 1-5 starting page 465.
Q1 Figure 1 shows two 10.0 m
ECE-ENGR 4243-ECE 6243 HW10 FET Scaling Laws and Design of NanoFETs-I F. Jain
(11/03/15; due 11/10)
Answer Q.1 and Q.2
Q.3, Q.4 and Q.5 to be answered in two weeks.11/17/15
Q.6 submission to be announced.
Q.1 (a) Summarize in few lines CE, CV, QCV and GS
ECE/ENGR 4243-6243
HW 8A CNT Fundamentals
F. Jain 102715
Solution set distributed on 10202015 (L8).
Q.1. (a) Write an expression for the chirality vector in terms of unit vectors a1 and a2. What are
the n, m numbers for a metallic carbon nanotube.
Q.2 Rec
ENGR-ECE4243/6243 HW#6 October 20, 2014 due in one week
F. Jain
Q.1. Briefly describe the following methods of growing nanowires using:
(1) VLS and SLS nanowire growth technique using gold nanodots,
(ii) Electro-spinning method,
(iii) Templating nanowire
ENGR-ECE4243/6243 HW#6 October 20, 2014 due in one week
F. Jain
Q.1. Briefly describe the following methods of growing nanowires using:
(1) VLS and SLS nanowire growth technique using gold nanodots,
(ii) Electro-spinning method,
(iii) Templating nanowire
ECE/UConn ENGR-ECE4243-6243 HW #5: Absorption and Emission, Excitons, Solar Cells,
F.C. Jain 09/29/15 (due 10/13/2015) [Review questions with solutions Q1-9]. Work on Q.10-13
Q1 Figure 1 shows two 10.0 m thick Si and GaAs samples illuminated by a 10 mW ph
UCONN ENGR-ECE4243/6243 HW# 4 Conductance Quantization
09/22/15 Due 9/29/15, F. Jain
Q.1. Calculate the minimum value of resistance in a nanowire.
Q.2. why is the phonon scattering is phase breaking or coherence breaking and results in
non-ballistic trans
UConn ECE4243 HW3/solutions, Review of p-n junctions/heterojunctions, 09/15/2015 F. Jain
Q. 1 (a) Fig. 1 shows a p-n junction under equilibrium. Find junction width Wo and its components
xno and xpo.
(b) Draw the junction boundaries for a forward biased p
UCONN ENGR-ECE4243/6243
HW# 2 Finite barrier quantum well energy levels
09/07/15, Due on 9/15/15, F. Jain
Q. 1. (a) Determine the electron and hole (both light and heavy) energy levels and
wavefunctions in the well of an AlxGa1-xAs-GaAs multiple quantum w
ECE/UCONN ENGR4243/ECE 4243-ECE 6243 HW#1 Review Energy Wells and Barriers
F. Jain 9/01/2015
Due September 8, 2015
Q. 1A. Find the electron and hole energy levels in a Si potential well (Lx=50 Angstrom) with
SiO2 barriers confining along the x-axis. The b