The strength of long-range forces across thin liquid films

Reiter, Günter ; Sharma, Ashutosh ; Khanna, Rajesh ; Casoli, Alain ; David, Marie-Odile (1999) The strength of long-range forces across thin liquid films Journal of Colloid and Interface Science, 214 (1). pp. 126-128. ISSN 0021-9797

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We present experimental results on the instability of thin liquid polydimethylsiloxane films intercalated between a solid substrate and a liquid surrounding medium. The instability is induced by long-range van der Waals forces across the film. From the characteristic wavelength of the instability and from the apparent contact angle of the equilibrium structures, we deduce an effective Hamaker constant (A132) about 2-3 orders of magnitude higher than what is expected from calculations based on the individual Hamaker constants. With air as the surrounding medium, we obtain the expected values.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Van Der Waals Forces; Thin Liquid Films; Instability; Contact Angle
ID Code:47034
Deposited On:06 Jul 2011 10:50
Last Modified:06 Jul 2011 10:50

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