Plasmonic Sensing of Heat Transport at Solid-Liquid Interfaces

Jonglo Park, David G. Cahill

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2814-2821
Number of pages8
JournalJournal of Physical Chemistry C
Volume120
Issue number5
DOIs
StatePublished - Feb 18 2016

Fingerprint

liquid-solid interfaces
glucosides
Glucosides
heat
Water
Liquids
water
Self assembled monolayers
Ethanol
ethyl alcohol
liquids
Nonionic surfactants
Fused silica
Light transmission
Laser pulses
adhesion
Adhesion
Sodium
surfactants
sodium

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Plasmonic Sensing of Heat Transport at Solid-Liquid Interfaces. / Park, Jonglo; Cahill, David G.

In: Journal of Physical Chemistry C, Vol. 120, No. 5, 18.02.2016, p. 2814-2821.

Research output: Contribution to journalArticle

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