Cited by 275Thermal properties of materialsThermography and Photoacoustic TechniquesMechanical and Thermal Properties Analysis

1 ω , 2 ω , and 3ω methods for measurements of thermal properties

Dames, Chris, Chen, Gang·2005·Review of Scientific Instruments

Abstract

3 ω methods are commonly used to measure the thermal conductivity of a substrate adjacent to a strip heater or the thermal conductivity and specific heat of a suspended wire. Here we consider the general case of a line heater that is also used to sense temperature. Analysis of all harmonics is presented in terms of generic thermal and electrical transfer functions and is readily adapted to other experimental configurations. We identify voltage signals at 2ω and 1ω that contain the same information about the thermal properties as the 3ω signal. The 2ω voltage requires a dc offset at the current source. The 1ω voltage requires a very stable current source, but eliminates the need for higher-harmonic detection, and is advantageous for studying the dynamics of systems with very fast thermal response times. The 1ω,2ω, and 3ω methods compare favorably with experiments using a suspended platinum wire and a line heater on a Pyrex substrate. With a modern lock-in amplifier, no common-mode voltage subtraction is necessary, which simplifies the experiment compared to the common practice of balancing a bridge or using a multiplying digital-to-analog converter. We also show that the widespread practice of using a voltage source to approximate a current source is only valid when the sample resistance is small compared to the total electrical resistance of the circuit, and derive and experimentally verify a correction factor to be used otherwise.

Integrity signals

Registry

Crossref · 10.1063/1.2130718

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13 of 13 references verified0 citation errors · 0 not checkable

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  • Electrical resistance thermometry has been applied to measure the thermal conductivity of low-dimensional solids in both direct and modulated current configurations.

    “Electrical resistance thermometry has been applied to measure the thermal conductivity of low dimensional solids (films, membranes, wires, and bridges) [13-15] in both direct [16-20] and modulated (1-omega, 2-omega, 3-omega) [21,22] current configurations.”

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Authors
Dames, C., & Chen, G.
Affiliations
Massachusetts Institute of Technology (US)
Venue
Review of Scientific Instruments
Published
2005-12-01
Volume
76
Issue
12
ISSN
  • 0034-6748 (ISSN-L)
  • 1089-7623
OpenAlex
W2094240247
Cited by
275
References
13
Citations by year
2026: 8 · 2025: 16 · 2024: 13 · 2023: 12 · 2022: 15 · 2021: 18 · 2020: 9 · 2019: 15 · 2018: 17 · 2017: 14 · 2016: 18 · 2015: 20 · 2014: 18 · 2013: 15 · 2012: 19
FWCI
2.65
Type
journal article
Language
en
Open access
closed
Locations
Review of Scientific Instruments (publishedVersion)
Funders
National Science Foundation
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 › Mechanical and Thermal Properties Analysis
Keywords
3ω method, thermal conductivity measurement, specific heat measurement, harmonic analysis, common-mode voltage, lock-in amplifier, Pyrex substrate, platinum wire

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