Flow-controlled phase boundaries in Langmuir monolayers

Article Abstract:

A laser-induced thermocapillary pump is used to investigate flow-controlled fingering of the liquid expanded/liquid condensed phase boundary in a 2-d insoluble monolayer. It is found that the transient growth as well as the stationary patterns point toward a flow controlled fingering instability, an intrinsic mechanism, and does not depend on the fluorescence label concentration.

Phase transformations (Statistical physics), Phase transitions (Physics), Chemistry, Physical and theoretical, Physical chemistry, Structure, Chemical properties, Report

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Splitting of an s= 1 point disclination into half- integer disclinations upon laser heating of a Langmuir monolayer

Article Abstract:

Laser heating experiments on solid Langmuir monolayer textures are described. Brewster angle microscopy images of s=1 point disclination textures of the molecular orientation of a pentacosadiynoic acid Langmuir monolayer suggest that the molecules are in a tilted orientationally ordered phase with a tilt angle close to pi/2.

All Other Miscellaneous Electrical Equipment and Component Manufacturing, Electronic components, not elsewhere classified, Other Electronic Component Manufacturing, Lasers, Liquid Crystals, Lasers & Related Equip, Usage, Thermal properties, Laser

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Micromanipulation of Langmuir-monolayers with optical tweezers

Article Abstract:

A facile technique for the manipulation of Langmuir-monolayers at the air/water interface is reported. Optical tweezers coupled with fluorescence and Brewster angle microscopy are used to produce a system capable of mechanical and thermal handling of monolayers on a micrometer scale.

Fluorescence, Thermodynamics

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