Cited by 455Thermal properties of materialsThermography and Photoacoustic TechniquesHeat Transfer and Boiling Studies

Thermal Conductance of Hydrophilic and Hydrophobic Interfaces

Ge, Zhenbin, Cahill, David G., Braun, Paul V.·2006·Physical Review Letters

Abstract

Using time-domain thermoreflectance, we have measured the transport of thermally excited vibrational energy across planar interfaces between water and solids that have been chemically functionalized with a self-assembled monolayer (SAM). The Kapitza length--i.e., the thermal conductivity of water divided by the thermal conductance per unit area of the interface--is analogous to the "slip length" for water flowing tangentially past a solid surface. We find that the Kapitza length at hydrophobic interfaces (10-12 nm) is a factor of 2-3 larger than the Kapitza length at hydrophilic interfaces (3-6 nm). If a vapor layer is present at the hydrophobic interface, and this vapor layer has a thermal conductivity that is comparable to bulk water vapor, then our experimental results constrain the thickness of the vapor layer to be less than 0.25 nm.

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Crossref · 10.1103/physrevlett.96.186101

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  • TDTR can also be applied to characterize thermal properties of liquids and fluids, such as the thermal conductivity/heat capacity of liquids, thermal conductance of solid/liquid interfaces, the heat transfer coefficient of fluids during evaporation, condensation, microchannel cooling, and flow boiling.

    “For example, TDTR can also be applied to characterize thermal properties of liquids and fluids, such as the thermal conductivity/heat capacity of liquids, 103 thermal conductance of solid/liquid interfaces, 80, 233, 234 the heat transfer coefficient of fluids during evaporation, 235, 236 condensation, 237 microchannel cooling, 238 and flow boiling. 239”

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Authors
Ge, Z., Cahill, D. G., & Braun, P. V.
Affiliations
University of Illinois Urbana-Champaign (US)
Venue
Physical Review Letters
Published
2006-05-08
Volume
96
Issue
18
Pages
186101-186101
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W1996203962
Cited by
455
References
34
Citations by year
2026: 19 · 2025: 26 · 2024: 17 · 2023: 24 · 2022: 27 · 2021: 29 · 2020: 30 · 2019: 29 · 2018: 23 · 2017: 43 · 2016: 37 · 2015: 17 · 2014: 20 · 2013: 20 · 2012: 16
FWCI
10.04
Type
journal article
Language
en
Open access
closed
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • Bulletin of the American Physical Society
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Engineering › Mechanics of Materials › Thermography and Photoacoustic Techniques
  • Physical Sciences › Engineering › Mechanical Engineering › Heat Transfer and Boiling Studies
Keywords
thermal conductance, hydrophobic interface, hydrophilic interfaces, self-assembled monolayers, solid-water interface, vibrational energy transport, time-domain thermoreflectance, interfacial thermal resistance

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