کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
612445 1454614 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Generation and characterization of surface layers on acoustically levitated drops
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Generation and characterization of surface layers on acoustically levitated drops
چکیده انگلیسی

Surface layers of natural and technical amphiphiles, e.g., octadecanol, stearic acid and related compounds as well as perfluorinated fatty alcohols (PFA), have been investigated on the surface of acoustically levitated drops. In contrast to Langmuir troughs, traditionally used in the research of surface layers at the air–water interface, acoustic levitation offers the advantages of a minimized and contact-less technique. Although the film pressure cannot be directly adjusted on acoustically levitated drops, it runs through a wide pressure range due to the shrinking surface of an evaporating drop. During this process, different states of the generated surface layer have been identified, in particular the phase transition from the gaseous or liquid-expanded to the liquid-condensed state of surface layers of octadecanol and other related amphiphiles. Characteristic parameters, such as the relative permeation resistance and the area per molecule in a condensed surface layer, have been quantified and were found comparable to results obtained from surface layers generated on Langmuir troughs.

Monomolecular surface layers of different natural and technical amphiphiles have been successfully generated and characterized on acoustically levitated water drops, introducing this technique as a promising tool to interface sciences.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 310, Issue 2, 15 June 2007, Pages 559–569
نویسندگان
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