Add time:08/26/2019         Source:sciencedirect.com

The development of Langmuir-Blodgett films for applications generally exploits either organization or orientation or both in these extremely thin films. The final organization of built-up monolayers may be influenced appreciably by the choice of film deposition conditions. In this report we document the effects of some relevant environmental variables on the monolayer isotherms and monolayer stability of the vinyl ester, vinyl stearate. The effect of subphase temperature, barrier displacement rate and choice of casting solvent are addressed. Temperature was found to be the most dominant variable influencing the adsorption isotherm and monolayer stability. For barrier displacement rates over the range 1–7 cm min-1 there was little effect on the adsorption isotherm. Benzene (spreading coefficient, So/w(20 °C) = −7.58) when used as a casting solvent yields a more dramatic “liquid” to “solid” transition and a larger initial area per molecule for detection when compared with heptane (So/w(20 °C) = +1.47).

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