Stability of thin polymer films on a corrugated substrate |
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Authors: | N Rehse C Wang M Hund M Geoghegan R Magerle G Krausch |
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Institution: | Lehrstuhl für Physikalische Chemie II and Bayreuther Zentrum für Kolloide und Grenzfl?chen (BZKG), Universit?t Bayreuth, D-95440 Bayreuth, Germany, DE
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Abstract: | We study the wetting behaviour of thin polystyrene (PS) films on regularly corrugated silicon substrates. Below a critical
film thickness the PS films are unstable and dewet the substrates. The dewetting process leads to the formation of nanoscopic
PS channels filling the grooves of the corrugated substrates. Films thicker than the critical thickness appear stable and
follow the underlying corrugation pattern. The critical thickness is found to scale with the radius of gyration of the unperturbed
polymer chains.
Received 6 April 2000 and Received in final form 24 August 2000 |
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Keywords: | PACS 68 45 Gd Wetting - 68 15 +e Liquid thin films - 61 41 +e Polymers elastomers and plastics |
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