Early Stages in the Growth of Electric Field-Induced Surface Fluctuations | Zendy

K. Amanda Leach | Zendy; Zhiqun Lin | Zendy; Thomas P. Russell | Zendy

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Early Stages in the Growth of Electric Field-Induced Surface Fluctuations

Author(s) -

K. Amanda Leach,

Zhiqun Lin,

Thomas P. Russell

Publication year - 2005

Publication title -

macromolecules

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.994

H-Index - 313

eISSN - 1520-5835

pISSN - 0024-9297

DOI - 10.1021/ma048157p

Subject(s) - electrohydrodynamics , electric field , growth rate , wavelength , reflection (computer programming) , voltage , measure (data warehouse) , electrode , interference (communication) , condensed matter physics , instability , optics , chemistry , statistical physics , mechanics , materials science , physics , mathematics , quantum mechanics , geometry , channel (broadcasting) , electrical engineering , database , computer science , programming language , engineering

Real-time measurements of fluctuations arising from electrohydrodynamic instabilities at polymer liquid/air interfaces were used to characterize the selection of a dominant wavelength and the rate at which this fluctuation grows. Reflection interference fringes from the film surface were used to measure the growth rates of fluctuations and their dependence on electrostatic pressure. The growth rate was found to exponentially depend on time and strongly depend on the applied voltage and initial distance between the liquid surface and the opposing electrode. Results at early times are in quantitative agreement with predictions from a linear stability analysis, yet deviations are seen with increasing time and define the limits over which the linearized theory is applicable.

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