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Title: Surface properties of a single perfluoroalkyl group on water surfaces studied by surface potential measurements
Authors: Shimoaka, Takafumi  kyouindb  KAKEN_id
Tanaka, Yuki
Shioya, Nobutaka
Morita, Kohei
Sonoyama, Masashi
Amii, Hideki
Takagi, Toshiyuki
Kanamori, Toshiyuki
Hasegawa, Takeshi  kyouindb  KAKEN_id
Author's alias: 下赤, 卓史
長谷川, 健
Keywords: Langmuir monolayer
Surface potential
Single perfluoroalkyl chain
Water surface
Issue Date: 1-Dec-2016
Publisher: Elsevier
Journal title: Journal of Colloid and Interface Science
Volume: 483
Start page: 353
End page: 359
Abstract: A discriminative study of a single perfluoroalkyl (Rf) group from a bulk material is recently recognized to be necessary toward the total understanding of Rf compounds based on a primary chemical structure. The single molecule and the bulk matter have an interrelationship via an intrinsic two-dimensional (2D) aggregation property of an Rf group, which is theorized by the stratified dipole-arrays (SDA) theory. Since an Rf group has dipole moments along many C–F bonds, a single Rf group would possess a hydrophilic-like character on the surface. To reveal the hydration character of a single Rf group, in the present study, surface potential (ΔV) measurements are performed for Langmuir monolayers of Rf-containing compounds. From a comparative study with a monolayer of a normal hydrocarbon compound, the hydration/dehydration dynamics of a lying Rf group on water has first been monitored by ΔV measurements, through which a single Rf group has been revealed to have a unique “dipole-interactive” character, which enables the Rf group interacted with the water ‘surface.’ In addition, the SDA theory proves to be useful to predict the 2D aggregation property across the phase transition temperature of 19 °C by use of the ΔV measurements.
Rights: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
The full-text file will be made open to the public on 1 December 2018 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/216978
DOI(Published Version): 10.1016/j.jcis.2016.08.055
PubMed ID: 27569518
Appears in Collections:Journal Articles

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