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NAnotechnology : Graphene preparation. Christina Cox Quentin Eustace. Overview. Graphene’s properties Goals of experimentation Six experiments Graphene exfoliation Future exploration. Graphene. Applications : Microelectronics Transistors operate higher frequency - PowerPoint PPT Presentation
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NANOTECHNOLOGY:GRAPHENE PREPARATION
Christina CoxQuentin Eustace
OVERVIEW
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Graphene’s properties
Goals of experimentation
Six experiments
Graphene exfoliation
Future exploration
GRAPHENEProperties: Electrically conductive Transparent 100 times stronger
than steel Flexible
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Applications:
Microelectronics
Transistors operate higher frequency
Display screens in mobile devices
Sensors to diagnose diseases
Lithium-ion batteries recharge faster
GOALSVary current to obtain a uniform copper film.
Supply additives to the solution to control the rate of the plating process.
Manipulate time to adjust thickness of desired copper film.
Use scotch tape to quickly obtain at least 10nm of graphene.
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EXPERIMENT 1
25 minutes applying 10-30 mA Great thickness differentiation
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EXPERIMENT 2
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3 minutes applying 1 mACopper crystals1 1 1 orientation
EXPERIMENT 3
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10 minutes applying 1 mACrystal alignmentUniformity increases
EXPERIMENT 4
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10 minutes applying 10 mACopper clusters
EXPERIMENT 5
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30 minutes applying 2 mAProcess is improving
EXPERIMENT 6
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60 minutes applying 0.5 mA The most uniform film
GRAPHENE EXFOLIATION
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The process of folding and peeling apart graphite on scotch tape.
RESULTS
Low current for a long period of time provided best results.
Additives controlled the rate of the electroplating process.
Graphene exfoliation obtained small area of graphene.
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FUTURE GOALS
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Minimize the amount of clusters present in the final film.
Further experiment on the ideal amount of time, current, and the chemical composition of the bath.
Experiment with uniformly plated copper film as substrate during graphene growth.
Determine the optimum process for electroplating copper.
Questions and Answers
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