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Phys. Rev. Lett. 64, 1903–1906 (1990)

Competing interactions and domain-shape instabilities in a monomolecular film at an air-water interface

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M. Seul and M. J. Sammon
AT&T Bell Laboratories, Murray Hill, New Jersey 07974

Received 14 November 1989; published in the issue dated 16 April 1990

Domain-shape instabilities are investigated in a two-dimensional binary mixture of near-critical composition, a monomolecular film confined to an air-water interface and composed of a phospholipid and cholesterol. We apply the methodology of spectral analysis to the quantitative description of domain-wall configurations. This permits us to identify an elliptic instability and a branching instability leading into a ‘‘melted’’ stripe phase in the vicinity of the consolute point. In between, a regime exists in which domain-wall fluctuations exhibit a capillary-wave spectrum.

© 1990 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.64.1903
DOI:
10.1103/PhysRevLett.64.1903
PACS:
68.10.-m, 61.30.Cz, 64.60.-i, 77.80.Dj