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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