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Material
Growth and Characterization Facility
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Atomic Force Microscope
We have
a Digital Instruments Dimension 3100 atomic force microscope. This
equipment is used to image nanotubes and nanowires on surface.
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Scanning electron Microscope
This
is a JEOL 848 scanning electron microscope. We have converted this
to do e-beam lithography.
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Chemical Vapor Deposition Systems for Carbon Nanotube and Nanowire Growth
We
have several chemical vapor deposition systems made of tube furnaces.
We have grown carbon nanotubes and a bunch of nanowires such as CdO, GaN
and InN.
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Laser ablation System for Nanowire Growth
We
have used this system to grow GaN and In2O3 nanowires.
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RF Sputtering system
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Thermal Evaporator
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Dry Box
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Laurell Spinner
This
is for the e-beam resist spin-on.
Other
facilities include a THF distillation system, a compact ultra-high-vacuum
(UHV) evaporator with liquid nitrogen cooled stage.
Measurement
And Test Facilities
We have
a vast selection of measurement and test facilities. We have one
regular probe station and a variable-temperature probe station. We
have four sets of equipment for high-precision electronic measurements:
Agilent 4156B, H/P 4145B, a Keithley 237/2400 combination and a data acquisition
system. We also have two cryostats with base temperatures of 1.2
K and equipped with a 2.6 T magnet. Purchasing of a cryostat with
8 T magnet is under way.
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Probe Station
This
is a picture of one of our probe stations.
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Low Temperature Probe Station
This
is the continuous flow variable temperature probe station. This allows
us to measure devices in vacuum and also at low temperature without going
through the trouble of bonding.
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Agilent 4156: Semiconductor Parameter Analyzer
This
is a picture of the Agilent 4156B. This equipment has a voltage resolution
of 0.1 mV and a current resolution of 1fA. It’s controlled by a computer
for automatic measurements.
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HP 4145B
HP
4145B has a voltage resolution of 1 mV and a current resolution of 10 fA.
We use 4156B and 4145B extensively for high-precision electronic measurements.
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Keithley Combo
This
is a picture of our Keithley 2400/237 combo. A computer is used to
control this combo and an oxford temperature controller for automatic measurement.
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Data Acquisition System
We
have a data acquisition system designed to measure Coulomb diamonds at
low temperatures.
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Amplifiers
We
have all sorts of amplifiers available in our lab such as SRC-850 lock-in
amplifiers, current amplifiers from DL Instruments and differential amplifiers
from SRC.
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Variable temperature cryostats
Here
are pictures of two veriable-temperature cryostats we have. Both
can reach 1.2 K and 2.6 T magnetic field. One is equipped with microwave
capabilities.
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Helium-3 system
This
is under planning.
Facilities
Available on Campus
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Clean Room Facilities
For
most of our device fabrication, we use the clean room facilities in the
Keck Photonics Center on campus. There are several Karlsuss mask
aligners, a couple of e-beam evaporators for both metals and dielectrics,
an RIE/PECVD system, oxidation furnaces, an LPCVD SiN furnace and an converted
e-beam lithography facility. For more information, please go to the
Keck Photonics Center website.
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Material Analysis Facilities
We
go to the Microscope Center on campus to perform material analysis.
There are a variety of tools such as scanning electron microscopes, transmission
electron microscopes and x-ray diffraction systems.
We have
a wide range of facilities which we use in our research.
Some
of them are shown here on this page. |