On the modulation frequency dependence of the photoacoustic signal for a metal coated glass-liquid system

• Authors: Ernesto Marín , Gerardo Vera-Medina , Arturo García , Antonio Calderón
• Languages of publication: EN

Abstracts

EN

We show that the front photoacoustic signal due to a sample consisting of a glass plate with a metal coated surface, at which thermal waves are generated by periodical light absorption, enhances for certain modulation frequencies when the other glass surface is covered with a liquid sample. This contradicts the intuitive expectation based on the assumption that the liquid provides a new channel for heat conduction thereby decreasing the substrate temperature. Experimental results are shown and the described effect is explained using a thermal wave interference model.

Keywords

EN

photoacoustic; coatings; thermal waves; heat transfer

Discipline

• 42.25.Hz: Interference
• 43.58.+z: Acoustical measurements and instrumentation
• 44.90.+c: Other topics in heat transfer (restricted to new topics in section 44)
• 65.20.-w: Thermal properties of liquids
• 66.10.cd: Thermal diffusion and diffusive energy transport

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2010
• Volume: 8
• Issue: 4
• Pages: 634-638

Dates

published

1 - 8 - 2010

online

22 - 5 - 2010

Contributors

author

Ernesto Marín

• Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, Legaria 694, Col. Irrigación, C.P. 11500, México D.F., México

author

Gerardo Vera-Medina

• Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, Legaria 694, Col. Irrigación, C.P. 11500, México D.F., México

author

Arturo García

• Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, Legaria 694, Col. Irrigación, C.P. 11500, México D.F., México

author

Antonio Calderón

• Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, Legaria 694, Col. Irrigación, C.P. 11500, México D.F., México

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Identifiers

DOI

10.2478/s11534-009-0121-x