Power spectral density of free-standing viscoelastic films by adiabatic approximation

Hai Yao Deng; Ranxing N. Li; Haitao Huang; Ophelia K C Tsui; Chi Hang Lam

doi:10.1021/la4000704

Power spectral density of free-standing viscoelastic films by adiabatic approximation

Hai Yao Deng, Ranxing N. Li, Haitao Huang, Ophelia K C Tsui, Chi Hang Lam

Research output: Journal article publication › Journal article › Academic research › peer-review

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Abstract

In a previous study, we calculated the surface dynamics of noisy viscoelastic supported films by using an adiabatic approximation. An expression was derived for the time-dependent power spectral density (PSD), which was found to produce good agreement with experiment. In this study, we extend the treatment to viscoelastic free-standing films. Two sets of surface capillary normal modes, namely, the squeezing and bending modes, were found. The frequency dispersion relation of the former resembles that of supported films. The latter is distinctively different and diverges at long wavelengths. By incorporating the experimental conditions, we obtained satisfactory agreement between theory and experiment.

Original language	English
Pages (from-to)	4283-4289
Number of pages	7
Journal	Langmuir
Volume	29
Issue number	13
DOIs	https://doi.org/10.1021/la4000704
Publication status	Published - 2 Apr 2013

ASJC Scopus subject areas

Electrochemistry
Condensed Matter Physics
Surfaces and Interfaces
General Materials Science
Spectroscopy

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10.1021/la4000704

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title = "Power spectral density of free-standing viscoelastic films by adiabatic approximation",

abstract = "In a previous study, we calculated the surface dynamics of noisy viscoelastic supported films by using an adiabatic approximation. An expression was derived for the time-dependent power spectral density (PSD), which was found to produce good agreement with experiment. In this study, we extend the treatment to viscoelastic free-standing films. Two sets of surface capillary normal modes, namely, the squeezing and bending modes, were found. The frequency dispersion relation of the former resembles that of supported films. The latter is distinctively different and diverges at long wavelengths. By incorporating the experimental conditions, we obtained satisfactory agreement between theory and experiment.",

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T1 - Power spectral density of free-standing viscoelastic films by adiabatic approximation

AU - Deng, Hai Yao

AU - Li, Ranxing N.

AU - Huang, Haitao

AU - Tsui, Ophelia K C

AU - Lam, Chi Hang

PY - 2013/4/2

Y1 - 2013/4/2

N2 - In a previous study, we calculated the surface dynamics of noisy viscoelastic supported films by using an adiabatic approximation. An expression was derived for the time-dependent power spectral density (PSD), which was found to produce good agreement with experiment. In this study, we extend the treatment to viscoelastic free-standing films. Two sets of surface capillary normal modes, namely, the squeezing and bending modes, were found. The frequency dispersion relation of the former resembles that of supported films. The latter is distinctively different and diverges at long wavelengths. By incorporating the experimental conditions, we obtained satisfactory agreement between theory and experiment.

AB - In a previous study, we calculated the surface dynamics of noisy viscoelastic supported films by using an adiabatic approximation. An expression was derived for the time-dependent power spectral density (PSD), which was found to produce good agreement with experiment. In this study, we extend the treatment to viscoelastic free-standing films. Two sets of surface capillary normal modes, namely, the squeezing and bending modes, were found. The frequency dispersion relation of the former resembles that of supported films. The latter is distinctively different and diverges at long wavelengths. By incorporating the experimental conditions, we obtained satisfactory agreement between theory and experiment.

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U2 - 10.1021/la4000704

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JO - Langmuir

JF - Langmuir

IS - 13

ER -

Power spectral density of free-standing viscoelastic films by adiabatic approximation

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