Thermal diffusivity of few-layers graphene measured by an all-optical method

H. Cabrera, D. Mendoza, J. L. Benítez, C. Bautista Flores, S. Alvarado, E. Marín

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© 2015 IOP Publishing Ltd. We report on the measurement of the thermal diffusivity, D, of few-layers graphene obtained by chemical vapor deposition, using a noncontact optical microscopy method based on a mode mismatched thermal lens technique in a pump-probe two-laser beams configuration. It takes advantage of the coaxial counter propagating tightly focused excitation and collimated probe beams in an improved thermal lens microscopy setup. The obtained results: D = (6.5 ± 0.09) × 10-4m2s-1, D = (1.9 ± 0.07) × 10-4m2s-1and D = (1.3 ± 0.05) × 10-4m2s-1for four (on a glass slide), eight and sixteen graphene (freestanding) layers are reasonable values, as can be concluded from reported literature data.
Original languageAmerican English
JournalJournal of Physics D: Applied Physics
StatePublished - 7 Oct 2015

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