Using Electrostatic Force Cleaning to Purify PMMA Stained
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Using Electrostatic Force Cleaning to Purify PMMA Stained Graphene Christina Cox and Madelyn Fahhoum CURENT, University of Tennessee- Knoxville Final Presentations July 16 -17 Knoxville, Tennessee
Overview Basics Goal Early Work Results Conclusions 2
Graphene Explained • https: //www. youtube. com/watch? v=Q_e. TLPKdr. Hs 3
Graphene Explained Strongest material known to man Flexible honeycomb structure Transparent Conductive 4
Applications Flexible durable phones Living tissue Megafast uploads 5
Goal • To obtain clean graphene for the purpose of implementation in transistors. What? When? Why? 6
Where We Come In • Production • Challenge: supporting the graphene- PMMA • Solution: EFC • PMMA 7
PMMA Process • Poly(methyl methacrylate) • Solution Coating • Helpful • Challenging 8
Graphene Prep Step 1: Removal Step 2: Selection 9
Graphene Prep Continued Step 3: Spin-coating Step 4: Heating- 120 ˚C 10
Prep Work Continued Step 5: Cu Etchant Step 6: Transfer 11
EFC Method • “Rails”- slides • “Drum”- vial with microfiber cloth • Double-sided tape • Distance from graphene 12
Early Work • Optical microscope • Mechanical Contact • Choice of variable 13
Testing • Sample 1 -. 5 mm • Sample 2 - 1 mm • Sample 3 - 1. 5 mm • Continuous film issuesislands • Cu Removal issues • Recipe change Sample 1 14
Testing Continued • . 5 mm success! • Testing at. 35 mm and. 2 mm • Inconsistency with continuous graphene 15
Conclusion • EFC is an effective method of cleaning graphene. • The smaller the distance between the graphene and the microfiber cloth, the more effective the cleaning. • The smallest amount of mechanical contact with graphene is very detrimental. 16
Works Cited http: //gizmodo. com/5988977/9 -incredible-uses-for-graphene http: //terahertztechnology. blogspot. com 2013_03_01_archive. html http: //img. chinaypages. com/v 2 f 80/3 b 7 e 3927 e 085 a 7 c 64 d 1 a 734 ecddb. jpg http: //farm 5. staticflickr. com/4091/5048567139_74 e 80643 fa_z. jpg http: //en. wikipedia. org/wiki/Poly(methyl_methacrylate http: //img. chinaypages. com/v/2 f/80/3 b 7 e 3927 e 085 a 7 c 64 d 1 a 734 ecddb. jpg 17
Acknowledgements CURENT, Dr. Gong Gu, Ali Mohsin 18
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