Sodium Dodecyl Sulfate Adsorbed Monolayers on Gold Electrodes
- 10 March 2007
- journal article
- research article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 23 (8) , 4383-4388
Abstract
Self-assembled aggregates of amphiphilic surfactant molecules formed on solid surfaces are similar to biological membranes. To understand the formation mechanism of these aggregates, we have studied the formation of self-organized monolayers from low-concentration sodium dodecyl sulfate (SDS) aqueous solutions (concentration below the critical micelle concentration) on gold surfaces. The study has been carried out by using simultaneously quartz crystal microbalance (QCM) and open circuit potential measurements in situ. We have developed a model which explains the variation of the QCM frequency and open circuit potential following SDS additions to water. The dominant growth mechanism during the major part of film formation was demonstrated to be surface diffusion of surfactant molecules.Keywords
This publication has 18 references indexed in Scilit:
- Polymer-supported membranes as models of the cell surfaceNature, 2005
- An EQCM Study of the Electrochemical Copper(II)/Copper(I)/Copper System in the Presence of PEG and Chloride IonsJournal of the Electrochemical Society, 2003
- Electrochemical and Neutron Reflectivity Characterization of Dodecyl Sulfate Adsorption and Aggregation at the Gold−Water InterfaceLangmuir, 2001
- Aqueous Sol−Gel Process in the Silica−Metasilicate System. A Microrheological StudyLangmuir, 2000
- One-Dimensional Nucleation−Growth−Collision in the Formation of Surface Hemimicelles of AmphiphilesLangmuir, 2000
- Direct Visualization of the Potential-Controlled Transformation of Hemimicellar Aggregates of Dodecyl Sulfate into a Condensed Monolayer at the Au(111) Electrode SurfaceLangmuir, 1999
- On the Kinetics of Adsorption of Dodecyl Sulfate at the Mercury−Water InterfaceLangmuir, 1997
- Surfactant Aggregates at a Metal SurfaceLangmuir, 1997
- Piezoelectric Response to Surface Stress Change of Gold Electrode in Sulfate Aqueous SolutionsJournal of the Electrochemical Society, 1987
- The interaction of water with solid surfaces: Fundamental aspectsSurface Science Reports, 1987