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Infrared Studies of the Potential Controlled Adsorption of Sodium Dodecyl Sulfate at the Au(111) Electrode Surface

Leitch, J. Jay and Collins, John and Friedrich, K. Andreas and Stimming, Ulrich and Dutcher, John R. and Lipkowski, Jacek (2012) Infrared Studies of the Potential Controlled Adsorption of Sodium Dodecyl Sulfate at the Au(111) Electrode Surface. Langmuir, 28, pp. 2455-2464. American Chemical society (ACS). DOI: 10.1021/la204451s ISSN 0743-7463

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Official URL: http://pubs.acs.org/journal/langd5

Abstract

Quantitative subtractively normalized interfacial Fourier transform infrared reflection spectroscopy (SNIFTIRS) was used to determine the conformation and orientation of sodium dodecyl sulfate (SDS) molecules adsorbed at the single crystal Au(111) surface. The SDS molecules form a hemimicellar/hemicylindrical (phase I) structure for the range of potentials between −200 ≤ E < 450 mV and condensed (phase II) film for electrode potentials ≥500 mV vs Ag/AgCl. The SNIFTIRS measurements indicate that the alkyl chains within the two adsorbed states of SDS film are in the liquid-crystalline state rather than the gel state. However, the sulfate headgroup is in an oriented state in phase I and is disordered in phase II. The newly acquired SNIFTIR spectroscopy measurements were coupled with previous electrochemical, atomic force microscopy, and neutron reflectivity data to improve the current existing models of the SDS film adsorbed on the Au(111) surface. The IR data support the existence of a hemicylindrical film for SDS molecules adsorbed at the Au(111) surface in phase I and suggest that the structure of the condensed film in phase II can be more accurately modeled by a disordered bilayer.

Item URL in elib:https://elib.dlr.de/76828/
Document Type:Article
Title:Infrared Studies of the Potential Controlled Adsorption of Sodium Dodecyl Sulfate at the Au(111) Electrode Surface
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Leitch, J. JayUniversity of GuelphUNSPECIFIED
Collins, John Technical University of MunichUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Stimming, Ulrich Technical University of MunichUNSPECIFIED
Dutcher, John R. University of GuelphUNSPECIFIED
Lipkowski, Jacek University of GuelphUNSPECIFIED
Date:January 2012
Journal or Publication Title:Langmuir
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:28
DOI :10.1021/la204451s
Page Range:pp. 2455-2464
Publisher:American Chemical society (ACS)
ISSN: 0743-7463
Status:Published
Keywords: sodium dodecyl sulfate (SDS), FTIR, infrared spectroscopy
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E EV - Energy process technology (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:06 Aug 2012 13:43
Last Modified:08 Mar 2018 18:46

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