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Jin Tae, Park
첨단연성물질 연구단
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Nonclassical Surface Nucleation of 6CB at the Air-Liquid Interface of a 6CB Oil-in-Water Nanoemulsion

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Title
Nonclassical Surface Nucleation of 6CB at the Air-Liquid Interface of a 6CB Oil-in-Water Nanoemulsion
Author(s)
Jin Tae Park; Govind Paneru; Iwamatsu, Masao; Law, Bruce M.; Hyuk Kyu Pak
Publication Date
2021-08
Journal
LANGMUIR, v.37, no.31, pp.9588 - 9596
Publisher
AMER CHEMICAL SOC
Abstract
The surface tension of a freshly extruded pendant drop of a nanoemulsion, 4-cyano-4'-hexylbiphenyl or 6CB (a liquid crystal) in water, exhibits an unusual surface nucleation phenomenon. Initially the surface tension is that of pure water; however, after a surface nucleation time, the surface tension decreases suddenly in magnitude. This nucleation time, of hundreds to thousands of seconds, depends strongly upon (i) the 6CB concentration in water, (ii) the 6CB nanodroplet size, and (iii) the temperature. Similar behavior is observed in both the isotropic and nematic phases of 6CB; thus, this surface nucleation phenomenon is unrelated to this system's liquid crystalline properties. The observed surface nucleation behavior can be explained via considerations of the nanoemulsion's bulk entropy together with the number of 6CB nanodroplets in the vicinity of the surface.
URI
https://pr.ibs.re.kr/handle/8788114/10441
DOI
10.1021/acs.langmuir.1c01487
ISSN
0743-7463
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > 1. Journal Papers (저널논문)
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