Please use this identifier to cite or link to this item:
Title: Effect of solvents on the self-assembly of long chain alkylphosphonic acids on indium tin oxide surface - In situ studies on the adsorption kinetics and electron transfer process
Authors: Lakshminarayanan, V.
Jagadeesh, R.Venkata
Keywords: Phosphonic acid
Adsorption kinetics
Microelectrode array
Contact angle
Issue Date: 15-Feb-2019
Publisher: Elsevier B. V.
Citation: Journal of Electroanalytical Chemistry, 2019, Vol 835, p338-345
Abstract: The spontaneous self-assembly process of phosphoric acids (PAs) onto indium tin oxide (ITO) surface has been studied in this work. We have carried out in situ adsorption kinetics studies of phosphoric acids in ethanol as a solvent using electrochemical impedance spectroscopy (EIS). Further, the effect of different solvents like ethanol, water, toluene and hexane on the structural integrity of the alkylphosphonic acid (CH3 (CH2)n PO3H2, n = 15,17) thin films on ITO surface has been investigated by using [Fe(CM)6]3‐/4‐ as a redox probe. From the study of formation kinetics, it is concluded that molecular self-assembly process follows two adsorption steps, a fast first step followed by a slower second step. The results of cyclic volumetric (CV) and impedance measurements show that phosphoric acids form a highly impermeable surface film on ITO when polar solvents like ethanol and water are used.
Description: Restricted Access.
ISSN: 1572-6657
Alternative Location:
Copyright: 2019 Elsevier B. V.
Appears in Collections:Research Papers (SCM)

Files in This Item:
File Description SizeFormat 
2019_Journal of the Electroanalytical Chemistry_Vol.835_338-345.pdf
  Restricted Access
Restricted Access1.18 MBAdobe PDFView/Open Request a copy

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.