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Heat transport across a gold nanowire/water interface enhanced by the solution ionic strength

Published online by Cambridge University Press:  15 July 2015

Susil Baral ,
Andrew J. Green  and
Hugh H. Richardson
Susil Baral
Affiliation:
Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, USA
Andrew J. Green
Affiliation:
Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, USA
Hugh H. Richardson
Affiliation:
Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, USA
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Abstract

Lithographically fabricated gold nanowires are optically excited with 532nm CW laser and the local temperature change is measured in air, pure water and various concentration aqueous solutions of ionic solutes NaCl, Na2SO4 and MgSO4 using the thermal sensor film of Al0.94Ga0.06N embedded with Er3+ ions. The interface thermal resistance for heat transfer from the excited nanowires into the surrounding liquid is determined from the slopes of the temperature change versus laser intensity plots obtained for the nanowire excitation under various solutions. Addition of ionic solute molecules into the solution decreases the interface thermal resistance and hence leads to increased heat dissipation into the surrounding liquid. Interface thermal resistance decreases exponentially with the ionic strength of solution and saturates around zero for solution ionic strength of 0.3M and higher.

Keywords

Aunanostructurethermal conductivity
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1779: Symposium M – Nanoscale Heat Transport―From Fundamentals to Devices , 2015 , pp. 33 - 38
Copyright
Copyright © Materials Research Society 2015 

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