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Issue 32, 2015
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Thermal diffusivity measured using a single plasmonic nanoparticle

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Abstract

A method to measure thermal diffusivity around a single heated gold nanoparticle is presented. It is based on photothermal single particle microscopy and employs the phase delay of temperature modulation due to finite thermal diffusivity. The phase delay is detected optically averaging over the focal volume of a diffraction limited beam of light. Thermal diffusivity is extracted by comparison to electromagnetic scattering calculations of the photothermal signal. Measurements in the solid (polymer) and liquid (water) are presented and compare well with literature data. The method paves the way for extended measurements of non-diffusive and heterogeneous heat transport in complex media.

Graphical abstract: Thermal diffusivity measured using a single plasmonic nanoparticle

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Publication details

The article was received on 20 May 2015, accepted on 14 Jul 2015 and first published on 17 Jul 2015


Article type: Paper
DOI: 10.1039/C5CP02920A
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Phys. Chem. Chem. Phys., 2015,17, 20868-20872
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    Thermal diffusivity measured using a single plasmonic nanoparticle

    A. Heber, M. Selmke and F. Cichos, Phys. Chem. Chem. Phys., 2015, 17, 20868
    DOI: 10.1039/C5CP02920A

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