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Thermal Transport Properties of Nanostructures Immobilized Substrates

Published online by Cambridge University Press:  31 January 2011

Hugh H. Richardson ,
Alyssa C. Thomas ,
Michael T. Carlson  and
Alexander O. Govorov
Hugh H. Richardson
Affiliation:
[email protected], Ohio University, Chemistry and Biochemistry, 231 Clippinger Laboratories, Athens, Ohio, 45701, United States, 740-517-8488, 740-593-0148
Alyssa C. Thomas
Affiliation:
[email protected], Ohio, Chemistry and Biochemistry, 45701, Ohio, United States
Michael T. Carlson
Affiliation:
[email protected], Ohio, Chemistry and Biochemistry, 45701, Ohio, United States
Alexander O. Govorov
Affiliation:
[email protected], Ohio University, Physics and Astronomy, Athens, Ohio, United States
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Abstract

We characterize a temperature sensor made from Erbium ions embedded in an amorphous AlGaN matrix that is accessed remotely by measuring the relative intensities from photoluminescence peaks of Er3+. We use this sensor to measure the nanoscale temperature around an optically excited single gold nanoparticle that has been immobilized on the AlGaN substrate. The maximum temperature increase measured experimentally is 8.3 K. The temperature measurement is diffraction limited by our microscope to 490 nm. This temperature corresponds theoretically to a maximum local temperature increase of 22 K. A straight-forward analysis using energy balance gives the thermal conductivity of the amorphous AlGaN substrate as 4.5 W/m-K.

Keywords

nanoscalethermal conductivityRaman spectroscopy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1172: Symposium T – Nanoscale Heat Transport–From Fundamentals to Devices , 2009 , 1172-T01-03
Copyright
Copyright © Materials Research Society 2009

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References

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