Ideal spread monolayer and multilayer formation of fully hydrophobic polythiophenes via liquid crystal hybridization on water

Langmuir : the ACS Journal of Surfaces and Colloids
Shusaku NaganoTakahiro Seki

Abstract

The spread monolayer formation of hydrophobic poly(3-alkylthiophene)s (P3ATs), regioregular poly(3-hexylthiophene) ( HT-P3HT), regioregular poly(3-dodecylthiophene) ( HT-P3DT), and regioirregular poly(3-hexylthiophene) ( RI-P3HT), were attained on the water surface via cospreading with a liquid-crystal molecule, 4'-pentyl-4-cyanobiphenyl (5CB). The spread monolayers were characterized by pi- A isotherms, Brewster angle microscopy (BAM), and atomic force microscopy (AFM). The molecular area for the cospread mixtures of P3ATs and 5CB expanded more than that of pure P3ATs as shown from the pi-A isotherms. BAM revealed that the mixed film forms the monomolecularly uniform and flat films on water. AFM elucidated that the spread monolayer of the hydrophobic P3ATs formed on the top of the 5CB monolayer on water with thicknesses of ca. 1.6 and ca. 2.6 nm for the two P3HTs and HT-P3DT, respectively. The P3AT/5CB hybrid monolayers could be fully transferred onto a solid substrate, and pure P3AT monolayers were obtained after volatilization of 5CB by gentle heating. The multilayer formation of pure P3AT monolayers was prepared by layer-by-layer deposition involving repeating horizontal deposition and successive volatilization of 5CB. Graz...Continue Reading

References

Jun 20, 1998·Science·H SirringhausR H Friend
Mar 7, 2002·Journal of the American Chemical Society·Shusaku Nagano, Takahiro Seki
May 31, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Shusaku NaganoTakahiro Seki
Apr 13, 2007·Chemical Reviews·Serap GünesNiyazi Serdar Sariciftci

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Citations

Jun 22, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Youichi TsuchiyaSeiji Shinkai
Mar 25, 2017·ACS Applied Materials & Interfaces·Saejin OhSo-Jung Park
Nov 21, 2015·Physical Review Letters·M Akai-KasayaY Kuwahara
Aug 28, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Shunsuke YamamotoMasaya Mitsuishi
Jun 1, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Yuko TakeokaMasahiro Rikukawa

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