Formation of Mixed Monolayers from 11-Mercaptoundecanoic Acid and Octanethiol on Au(111) Single Crystal Electrode under Electrochemical Control
| Autor: | Guadalupe Sánchez-Obrero, Manuel Blázquez, Teresa Pineda, Rafael Madueño, Jose M. Sevilla, Zoilo González-Granados |
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| Rok vydání: | 2013 |
| Předmět: |
Inorganic chemistry
Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric spectroscopy chemistry.chemical_compound General Energy Adsorption chemistry Chemical engineering Electrode Monolayer Physical and Theoretical Chemistry Cyclic voltammetry Bifunctional Single crystal |
| Zdroj: | The Journal of Physical Chemistry C. 117:24307-24316 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | The formation process and characterization of mixed layers of 11-mercaptoundecanoic acid (MUA) and octanethiol (OT) on Au(111) single crystal electrodes under electrochemical control from alkaline solutions are analyzed in this work by means of electrochemical techniques such as chronocoulometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The surface composition of the layers differs from the component ratio of bulk solution and is supposed to be directed by both the adsorption potential of the individual molecules and its adsorption behavior. The relative competitive adsorption capacity of the two functional groups in the bifunctional molecules plays an important role in the electrochemical deposition of mixed layers as the second component can occupy the free space that the first molecule liberates during reorganization. Two different mixed layers can be obtained under the experimental conditions of this work: a macroscopically homogeneous layer and a homogeneously mixed layer at hi... |
| Databáze: | OpenAIRE |
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