1. NAnotechnology: Graphene preparation
Christina Cox
Quentin Eustace

2. Overview Graphene’s properties Goals of experimentation
Six experiments
Graphene exfoliation
Future exploration

3. Graphene Properties: Applications: Electrically conductive
Transparent
100 times stronger than steel
Flexible
Applications:
Microelectronics
Transistors operate higher frequency
Display screens in mobile devices
Sensors to diagnose diseases
Lithium-ion batteries recharge faster

4. Goals Vary 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.

5. Experiment 1 25 minutes applying 10-30 mA
Great thickness differentiation

6. Experiment 2
3 minutes applying 1 mA
Copper crystals
1 1 1 orientation

7. Experiment 3 10 minutes applying 1 mA Crystal alignment
Uniformity increases

8. Experiment 4
10 minutes applying 10 mA
Copper clusters

9. Experiment 5
30 minutes applying 2 mA
Process is improving

10. Experiment 6
60 minutes applying 0.5 mA
The most uniform film

11. Graphene Exfoliation
The process of folding and peeling apart graphite on scotch tape.

12. 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.

13. Future Goals
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.

14. Questions and Answers