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High-Quality Graphene and Hexagonal- Boron Nitride Transfers on Sio2

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High-Quality Graphene and Hexagonal- Boron Nitride Transfers on Sio2 High-Quality Graphene and Hexagonal- Boron Nitride Transfers on SiO2 1 MELISSA HUYNH CHEMICAL ENGINEERING DEPARTMENT OF OREGON STATE UNIVERSITY DR. JUN JIAO, LESTER LAMPERT REU - PORTLAND STATE UNIVERSITY Overview 2 Importance High- Results and Quality Methodology Interpretation Graphene & HBN Raman Analysis Overview 3 Importance High- Results and Quality Methodology Interpretation Graphene & HBN Raman Analysis 2D Materials 4 Graphene Zero overlap semimetal Durable Heat and electricity conductivity Hexagonal-Boron Nitride Similar properties to graphene Future Application 5 Biological engineering Optical Electronics Composite materials Super Capacitors/ Energy Storage Overview 6 Importance High- Results and Quality Methodology Interpretation Graphene & HBN Raman Analysis Growth 7 Chemical Vapor Deposition (CVD) Copper catalyst Vertical growth with furnace Methane, hydrogen, argon gases Transfer of Graphene 8 PMMA spin coat Ammonium Persulfate (APS) Rinse Heat Acetone bath Transfer of HBN 9 Copper foil APS Corral Pumps Polymer-Free Approach 10 Similar to H-BN Outflow: APS Inflow: DI H2O and Isopropyl Alcohol Overview 11 Importance High- Results and Quality Methodology Interpretation Graphene & HBN Raman Analysis Graphene Spectrum 12 D band G band D/g 2D Band 2D/G Ideal Spectrum HBN spectrum 13 1300-1400 range Weak readings Carbon contamination Ideal Spectrum Overview 14 Importance High- Results and Quality Methodology Interpretation Graphene & HBN Raman Analysis Graphene Analysis Grown at 830 ̊ C [edge] Grown at 840 ̊ C [edge] Grown at 850 ̊ C [center] 15 Graphene Analysis 16 Graphene Center at 750 ̊C Graphene Edge at 750 ̊C 14000 18000 16000 12000 14000 10000 12000 8000 10000 Intensity Intensity 8000 6000 6000 4000 4000 2000 2000 0 0 1000 1500 2000 2500 3000 1000 1500 2000 2500 3000 Raman Shift (cm−1) Raman Shift (cm−1) Graphene Center at 850 ̊C Graphene Edge at 850 C̊ 10000 9000 9000 8000 8000 7000 7000 6000 6000 5000 Intensity 5000 Intensity 4000 4000 3000 3000 2000 2000 1000 1000 0 0 1000 1500 2000 2500 3000 1000 1500 2000 2500 3000 Raman Shift (cm−1) Raman Shift (cm−1) Graphene Analysis 17 Intensity vs. Temperature Intensity vs. Temperature (center) (edge) 1.5 2 1.5 1 Intensity Intensity 1 d/g d/g 0.5 2d/g 0.5 2d/g 0 0 700 750 800 850 700 750 800 850 Temperature ( ̊ C) Temperature ( ̊ C) HWHM vs. Temperature HWHM vs Temperature (center) (edge) 180 180 160 160 140 140 120 120 100 hwhm(cm−1) 100 hwhm(cm−1) 2D 2D 80 80 60 G 60 G 40 D 40 D 20 20 0 0 700 750 800 850 700 750 800 850 Temperature ( ̊ C) Temperature ( ̊ C) H-BN Analysis 18 H-BN Raman Spectrum (100x) 2900 2800 2700 2600 2500 Intensity H-BN 10x 2400 2300 2200 2100 2000 1250 1300 1350 1400 1450 1500 Raman Shift (cm−1) H-BN 100x Towards Ideality 19 Corral adjustments Polymer-free transfer Particle prevention Acknowledgments 20 Pete and Rosalie Johnson Dr. Skip Rochefort Dr. Jun Jiao Dr. Erik Sanchez Lester Lampert Ellie Bradley NSF References http://www.slideshare.net/agarwalarpit2050/graphene-and-its-future- applications http://www.graphenea.com/pages/graphene-uses- applications#.Vc1MFPlViko http://www.electrochem.org/dl/interface/spr/spr11/spr11_p045-046.pdf http://engineering.columbia.edu/even-defects-graphene-strongest-material- world http://accuratus.com/boron.html http://physastro.pomona.edu/wp- content/uploads/2012/09/thesis_pollard.pdf Images http://previews.123rf.com/images/ngad/ngad1503/ngad150300120/40807 836-finger-touch-screen-of-phone-on-green-rice-background-Stock- Photo.jpg https://www.bnl.gov/today/body_pics/2014/07/dist-structures-hr.jpg http://www.azom.com/images/Article_Images/ImageForArticle_10130(2).j pg http://cdn.shopclues.net/images/detailed/4609/09112010851_1400496988 .jpg http://www.intohigher.com/media/2340333/osu_vertical_logo.jpg http://www.nsf.gov/ 21 22 Thank you very much for listening! Any questions or comments?.
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