Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 105, Issue 1, Pages 182-187Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp0024266
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A technique for the manipulation of Langmuir-monolayers at the air/water interface is presented. Optical tweezers are combined with fluorescence and Brewster angle microscopy to produce a system capable of mechanical and thermal handling of monolayers on a micrometer scale. The viscoelastic, electrical, and thermodynamic properties of the monolayer can be determined by analysis of the perturbations of its structure. A method for force and heat calibration of the tweezers is given. Both kinds of micromanipulations are applied to the star shaped condensed domains in liquid expanded surroundings of bis[8-(1,2-dipalmitoyl-snglycero-3 -phosphoryl)-3,6-dioxaoctyl]disulfide (thiolipid) monolayers. The stability of the stars and the consequence of their interlocking on the interfacial flow are investigated.
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