The fabrication of silane-based fluorinated self-assembled monolayers (FSAMs) on indium tin oxide (ITO, a transparent electrode) was carried out making use of the following fluoroalkylsilanes (FAS): 2,2,3,3,4,4,5,5,6,6,6-undecafluoro-N-[3-(trimethoxysilyl)propyl]hexanamide (1;RF = C5F11) and 1,1,2,2,3,3,4,4,4-nonafluoro-N-[3-(trimethoxysilyl)propyl]butane-1-sulfonamide (2;RF =C4F9), containing an embedded amide and a sulfonamide group, respectively, between the short perfluoroalkyl chain (RF with C < 6) and the syloxanic moiety. The obtained FSAM-modified/ITO systems were characterized by X-ray photoelectron spectroscopy (XPS), contact angle (CA), surface energy measurements, and electrochemical impedance spectroscopy (EIS) and compared to ITO modified with a 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyltriethoxysilane (3;RF =C6F13), with the perfluoroalkyl group linked to the syloxanic moiety through a simple hydrocarbon chain. The results obtained show that the presence of the −NHCO− and −NHSO2 − groups have a different mode of action and, with the former, despite the short perfluoroalkyl chain, the ITO−1 system presents a CA (Θ water = 113.5°) and surface energy (γ = 14.0 mJ m −2) typical of amphiphobic materials. These properties can be exploited in a variety of applications, such as self-cleaning, anti-fouling, and anti-fingerprint coatings, and in advanced microelectronic components.

Fluoroalkylsilanes with Embedded Functional Groups as Building Blocks for Environmentally Safer Self-Assembled Monolayers / Barbara Ballarin; Davide Barreca; Maria Cristina Cassani; Giorgio Carraro; Chiara Maccato; Adriana Mignani; Dario Lazzari; Maurizio Bertola. - In: LANGMUIR. - ISSN 0743-7463. - STAMPA. - 31:(2015), pp. 6988-6994. [10.1021/acs.langmuir.5b01416]

Fluoroalkylsilanes with Embedded Functional Groups as Building Blocks for Environmentally Safer Self-Assembled Monolayers

BALLARIN, BARBARA;CASSANI, MARIA CRISTINA;MIGNANI, ADRIANA;
2015

Abstract

The fabrication of silane-based fluorinated self-assembled monolayers (FSAMs) on indium tin oxide (ITO, a transparent electrode) was carried out making use of the following fluoroalkylsilanes (FAS): 2,2,3,3,4,4,5,5,6,6,6-undecafluoro-N-[3-(trimethoxysilyl)propyl]hexanamide (1;RF = C5F11) and 1,1,2,2,3,3,4,4,4-nonafluoro-N-[3-(trimethoxysilyl)propyl]butane-1-sulfonamide (2;RF =C4F9), containing an embedded amide and a sulfonamide group, respectively, between the short perfluoroalkyl chain (RF with C < 6) and the syloxanic moiety. The obtained FSAM-modified/ITO systems were characterized by X-ray photoelectron spectroscopy (XPS), contact angle (CA), surface energy measurements, and electrochemical impedance spectroscopy (EIS) and compared to ITO modified with a 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyltriethoxysilane (3;RF =C6F13), with the perfluoroalkyl group linked to the syloxanic moiety through a simple hydrocarbon chain. The results obtained show that the presence of the −NHCO− and −NHSO2 − groups have a different mode of action and, with the former, despite the short perfluoroalkyl chain, the ITO−1 system presents a CA (Θ water = 113.5°) and surface energy (γ = 14.0 mJ m −2) typical of amphiphobic materials. These properties can be exploited in a variety of applications, such as self-cleaning, anti-fouling, and anti-fingerprint coatings, and in advanced microelectronic components.
2015
Fluoroalkylsilanes with Embedded Functional Groups as Building Blocks for Environmentally Safer Self-Assembled Monolayers / Barbara Ballarin; Davide Barreca; Maria Cristina Cassani; Giorgio Carraro; Chiara Maccato; Adriana Mignani; Dario Lazzari; Maurizio Bertola. - In: LANGMUIR. - ISSN 0743-7463. - STAMPA. - 31:(2015), pp. 6988-6994. [10.1021/acs.langmuir.5b01416]
Barbara Ballarin; Davide Barreca; Maria Cristina Cassani; Giorgio Carraro; Chiara Maccato; Adriana Mignani; Dario Lazzari; Maurizio Bertola
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/505770
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