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Direct Laser Writing of Graphene on Nickel and Platinum

Fauzi, F (2017) Direct Laser Writing of Graphene on Nickel and Platinum. Master's Thesis / Essay, Physics.

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Graphene is a promising material for emerging electronic devices with outstanding properties. To integrate graphene into practical circuits for electronic devices, one needs to pattern of graphene. Many methods are developed to pattern graphene, one of which is using laser-assisted chemical vapor deposition. We built a homemade laser-assisted chemical vapor deposition chamber for direct writing of graphene line. The system has several tunable parameters that influenced the graphene growth on the sample. We did a systematic study of laser-assisted graphene growth on nickel foil. We varied six parameters to obtain the recipe for graphene growth on nickel foil. Those parameters were laser power, beam diameter, scanning rate, gas mixture, base pressure, and foil thickness. The most promising parameters were also adopted to grow graphene on platinum foil. The laser intensity and foil thickness needed to be tuned to generate growth temperature suitable for graphene growth on nickel foil. By varying the gas mixture and scanning rate under a base pressure of 10-7 mbar, we obtained Raman spectra of wrinkled multilayer graphene and of hydrogenated amorphous carbon. These spectra were also found on platinum foil when using a gas mixture of 6×10-3 mbar of methane and 1×10-3 mbar of hydrogen and a scanning rate of 50 μm/s. The scanning electron microscopy was employed to confirm the presence of a wrinkled multilayer graphene on nickel and platinum. We successfully wrote a line of graphene on both nickel and platinum. Even though the laser-assisted chemical vapor deposition of graphene on nickel foil has been reported, the one on platinum foil has not been reported yet. These findings can provide a rapid fabrication of graphene patterns and open a door for fabricating various graphene-based devices.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Physics
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 08:31
Last Modified: 15 Feb 2018 08:31

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