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Graphene has high potential for becoming the next generation material for electronics, photonics and optoelectronics. However, spatially controlled modification of graphene is required for applications. Here, we report patterning and controlled tuning of electrical and optical properties of graphene by laser induced non-linear oxidation. We use four wave mixing (FWM) as a key method for imaging graphene and graphene oxide patterns with high sensitivity. FWM produces strong signal in monolayer graphene and the signal is highly sensitive to oxidation providing good contrast between patterned and non-patterned areas. We have also performed photo-oxidation and FWM imaging for air suspended carbon nanotubes.
Mika Pettersson,Jukka Aumanen,Andreas Johansson,Juha Koivistoinen, andPasi Myllyperkiö
"Nonlinear photo-oxidation of graphene and carbon nanotubes probed by four wave mixing imaging and spectroscopy (Presentation Recording)", Proc. SPIE 9554, Nanoimaging and Nanospectroscopy III, 95541C (5 October 2015); https://doi.org/10.1117/12.2190829
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Mika Pettersson, Jukka Aumanen, Andreas Johansson, Juha Koivistoinen, Pasi Myllyperkiö, "Nonlinear photo-oxidation of graphene and carbon nanotubes probed by four wave mixing imaging and spectroscopy (Presentation Recording)," Proc. SPIE 9554, Nanoimaging and Nanospectroscopy III, 95541C (5 October 2015); https://doi.org/10.1117/12.2190829