Surface plasmon resonance (SPR) excitation on metallic nanostructures can greatly increase the rate of non-radiative decay of excited conduction electrons, resulting in an increase of the local temperature of nanostructure asperities. To date, directly measuring the SPR-induced local temperature change on single plasmonic nanoparticles still remains as a challenge due to the lack of a suitable technique.  Herein, we demonstrated a novel graphene-based thermometry technique to explore the SPR-induced temperature change on single nanoparticles.  We discovered that the LSPR-induced local temperature change of a 50 nm Au nanoparticle can reach as high as 600 K.  Moreover, the temperatures of Au nanoparticle can be controlled by varying the incident laser powers.  Knowledge of the SPR-induced temperature change on the surfaces of nanostructures will facilitate the use of nanostructures in various desired chemical applications.

How hot is the plasmonic “hot spot”?

245th National Meeting (2013)

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