Chemical enhancement of Raman scattering on graphene oxide in the quantum plasmonic regime

ORAL

Abstract

Optoelectronic and mechanical properties of graphene oxide have been widely investigated. We observed two chemical enhancement mechanisms, one from the gold plasmonic tip via the tip-enhanced Raman spectroscopy (TERS) and the other from graphene oxide via the surface-enhanced Raman spectroscopy (SERS). We observed strong chemical enhancement from the gold plasmonic tip in the quantum plasmonic regime when the tip-sample distance is less than 1 nm. We improve the efficiency of the chemical enhancement by varying the tip-sample distance which allows us to clearly observe the effect of graphene oxide using nanoscale TERS imaging. Strong chemical enhancement can be used to improve the quality of sensors and nanophotonic devices on non-metallic substrates.

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Presenters

  • Sharad Ambardar

    University of South Florida, Physics department, University of South Florida

Authors

  • Sharad Ambardar

    University of South Florida, Physics department, University of South Florida

  • Dmitri Voronine

    University of South Florida, Physics department, University of South Florida