2014 - a summer to remember ret program at fiu by michael weiss
Post on 16-Dec-2015
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Prior to working in the lab, it was necessary to complete several safety trainings:
Chemical Handling Safety Basic Principles
Environmental Awareness Parts 1 and 2
EPA: Hazardous Waste Awareness
Fire Safety
HAZCOM: In Sync with GHS
Laboratory Safety: The Finer Points
Laser Safety
PPE: Don’t Start Work Without It
Safe Use of Fumehoods
Small Spills and Leaks
My lab experiences began with being trained to use the Hall Effect Measurement System. Using this, I was able to collect the following types of data on
graphene samples.
Bulk Concentration
Sheet Concentration
Mobility
Resistivity
Cross Hall Coefficients
Magneto-Resistance
Conductivity
Vertical/Horizontal Ratios
Next, I was taught how to transfer graphene from copper foil to another substrate. This process
occurred in three phases.
Phase 1 Cleaning
PMMA Coating to protect the graphene
Dry Etching
Wet Etching with ferric chloride
Phase 2o Cleaning of a silicon dioxide
substrate through sonication and heating with acetone, isopropanol, and deionized water
o Dry etchingo Scooping out graphene from a
copper etch batho Cleaning the graphene sample
with deionized watero Placing graphene sample on
the clean silicon dioxide wafer
o Spin coating with PMMAo Cleaning with acetone, isopropanol,
and deionized watero Drying with nitrogen
Phase 3
Later, I was taught how to complete an exfoliation process.
Breaking the silicon dioxide wafer into pieces
Cleaning the wafer pieces via sonication and heating with acetone, isopropanol, and deionized water
Spreading a sample of graphite or molybdenum sulfide on a piece of scotch tape
Transferring the graphite or molybdenum sulfide to the silicon dioxide wafer pieces
Heating these wafer pieces at 70°C
Examining the wafer pieces for purity
Additionally, I became proficient in operating the Raman Spectrometer to characterize graphene.
Static spectral acquisition
Extended spectral acquisition
Map image acquisition
Every Tuesday, my group and I attended a Pressure Sensor Fabrication Workshop where we learned about
the processes of pressure sensor fabrication and photolithography.
Every Wednesday, our entire group attended seminars at FIU or webinars from North Carolina State
University. These presentations were highly informative and enlightening as they were conducted
by some of the most prestigious engineers and scientists in their fields. These include Dr. Nezih Pala and Dr. Sakhrat Khizroev from FIU and Dr. M. McCord, Dr. James Lebeau and Dr. Ewan Pritchard from North
Carolina State University.
Every Friday, our entire group attended a Curriculum Workshop facilitated by Ms. Kerlyn Prada and formed
a Professional Learning Community. Educational protocols we were exposed to include:
Fears and Hopes Protocol
Four “A”s Text Protocol
Tuning Protocol
Microlabs Protocol
Warm Wheel Protocol
Charrette Protocol
Change in Practice Protocol
Free Form Mapping
Zones of Comfort, Risk, and Danger
During the six weeks we spent at FIU, we took advantage of the numerous opportunities for
collaboration and, speaking for myself, I know that I will be able to effectively incorporate what I learned
into my classroom curriculum and enhance the learning experiences of my students. Thank you
Stephanie and Dr. Milani for providing such an inspirational and worthwhile experience.
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