Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 21st October 2020 from 07:00 AM to 07:00 PM (BST).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 23, 2012
Previous Article Next Article

Pattern formation induced by an electric field in a polymer–air–polymer thin film system

Author affiliations

Abstract

Strong electric fields produce forces that can overcome the surface tension in thin liquid polymer films and in this way induce an instability of the free surface of the film, that triggers the formation of structures on a micrometer length scale. Here, we study experimentally a polymer–air–polymer system for several combinations of polymer films. These results are accompanied by theoretical considerations based on coupled long-wave time evolution equations for the two free surface profiles. The linear stability and nonlinear time evolution are investigated and compared to the experimental findings. The prediction that the instability always evolves through a mirror mode that couples the two surfaces in an anti-phase manner agrees well with the experimental results. The model describes well the linear (early stage) evolution of the instability. In the non-linear (later stage) evolution, topographical differences in the instability pattern occur if the mobilities of the two layers significantly differ and an unpredicted acceleration of growth is seen in thinner less mobile films. Possible reasons for the mismatch are discussed.

Graphical abstract: Pattern formation induced by an electric field in a polymer–air–polymer thin film system

Back to tab navigation

Supplementary files

Article information


Submitted
06 Feb 2012
Accepted
22 Mar 2012
First published
10 May 2012

Soft Matter, 2012,8, 6333-6349
Article type
Paper

Pattern formation induced by an electric field in a polymer–air–polymer thin film system

G. Amarandei, P. Beltrame, I. Clancy, C. O'Dwyer, A. Arshak, U. Steiner, D. Corcoran and U. Thiele, Soft Matter, 2012, 8, 6333
DOI: 10.1039/C2SM25273B

Social activity

Search articles by author

Spotlight

Advertisements