Electrochemical investigation on adsorption kinetics of long chain alkylsilanes and influence of solvents on their self-assembly and electron transfer behavior on indium tin oxide

Venkata Jagadeesh, R and Lakshminarayanan, V (2020) Electrochemical investigation on adsorption kinetics of long chain alkylsilanes and influence of solvents on their self-assembly and electron transfer behavior on indium tin oxide. In: Journal of Applied Electrochemistry .

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Abstract

Abstract: In situ adsorption kinetics of hexadecyltrimethoxy silane (HDTMS) and octadecyltrimethoxy silane (ODTMS) on indium tin oxide (ITO) surface at short time intervals were measured by electrochemical impedance (EIS) spectroscopy technique at constant frequency. The studies suggest that, self-assembly of silanes on ITO proceeds through two distinct adsorption steps, a fast first step followed by a slower second step. The inhibition of electron transfer by self-assembled silanes prepared in ethanol, toluene and hexane solvents were evaluated by cyclic voltammetry (CV) and EIS using Fe(CN)63�/4� and Ru(NH3)63+/2+ redox species. It is shown that, the quality of silane films are influenced by the polarity of solvent, chain length of silane and ITO substrate�solvent interactions. The effect of annealing on electron transfer barrier property of silane monolayers after their formation were studied. The pinhole characteristics of silane films on ITO prepared from various solvents under study were measured using EIS. This study demonstrates a strategy of producing an ultra-smooth and close-packed silane films on ITO surfaces which can have potential applications towards high performance organic electronics.

Item Type:	Journal Article
Publication:	Journal of Applied Electrochemistry
Publisher:	Springer
Additional Information:	The copyright of this article belongs to Springer
Keywords:	Adsorption; Ammonia; Cyclic voltammetry; Electrochemical impedance spectroscopy; Electron transitions; Film preparation; Indium metallography; Iron compounds; Organic solvents; Self assembly; Tin metallography; Tin oxides, Electrochemical impedance; Electrochemical investigations; Electron transfer barriers; Electron transfer behavior; Octadecyl-trimethoxy silanes; Organic electronics; Short time intervals; Solvent interactions, Silanes
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	30 Sep 2020 06:36
Last Modified:	30 Sep 2020 06:36
URI:	http://eprints.iisc.ac.in/id/eprint/66550

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