TY - JOUR
T1 - Plasmonic Sensing of Heat Transport at Solid-Liquid Interfaces
AU - Park, Jonglo
AU - Cahill, David G.
N1 - Funding Information:
This work was supported by Office of Naval Research Grant Number N00014-13-1-0866. Optical measurements were carried out in the Laser and Spectroscopy Laboratory of the Materials Research Laboratory. ALD deposition and SEM, AFM, and ellipsometry characterization of the Au nanodisks was carried out in the Center for Microanalysis of Materials, University of Illinois.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/2/18
Y1 - 2016/2/18
N2 - We report experimental studies of interfacial heat transport for a system of Au nanodisks supported on fused silica substrates, coated by hydrophilic and hydrophobic self-assembled monolayers, and immersed in water-ethanol mixtures and solutions of a nonionic surfactant, hexyl-β-d-glucoside in water. The Au nanodisks are abruptly heated by a sub-picosecond optical pulse; time-resolved changes in the temperature of the Au nanodisk and the liquid near the nanodisk/liquid interface are monitored by measurements of transient changes in optical transmission. The interface thermal conductance G of nanodisks coated with a hydrophilic self-assembled monolayer (SAM) of sodium 3-mercapto-1-propanesulfonate varies over the range 90 < G < 190 MW m-2 K-1 as the composition of the liquid mixture is changed from pure ethanol to pure water. With increasing hexyl-β-d-glucoside concentration in water, the interface thermal conductance of hydrophilic nanodisks decreases from 190 MW m-2 K-1 to 130 MW m-2 K-1 as the concentration is varied between pure water and 100 mM glucoside. For hydrophobic surfaces, G = 70 ± 10 MW m-2 K-1. We relate changes in thermal conductance to changes in work of adhesion.
AB - We report experimental studies of interfacial heat transport for a system of Au nanodisks supported on fused silica substrates, coated by hydrophilic and hydrophobic self-assembled monolayers, and immersed in water-ethanol mixtures and solutions of a nonionic surfactant, hexyl-β-d-glucoside in water. The Au nanodisks are abruptly heated by a sub-picosecond optical pulse; time-resolved changes in the temperature of the Au nanodisk and the liquid near the nanodisk/liquid interface are monitored by measurements of transient changes in optical transmission. The interface thermal conductance G of nanodisks coated with a hydrophilic self-assembled monolayer (SAM) of sodium 3-mercapto-1-propanesulfonate varies over the range 90 < G < 190 MW m-2 K-1 as the composition of the liquid mixture is changed from pure ethanol to pure water. With increasing hexyl-β-d-glucoside concentration in water, the interface thermal conductance of hydrophilic nanodisks decreases from 190 MW m-2 K-1 to 130 MW m-2 K-1 as the concentration is varied between pure water and 100 mM glucoside. For hydrophobic surfaces, G = 70 ± 10 MW m-2 K-1. We relate changes in thermal conductance to changes in work of adhesion.
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U2 - 10.1021/acs.jpcc.5b11706
DO - 10.1021/acs.jpcc.5b11706
M3 - Article
AN - SCOPUS:84958078641
VL - 120
SP - 2814
EP - 2821
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 5
ER -