STM investigation of HOPG superperiodic features caused by electrochemical pretreatment
Data(s) |
1995
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Resumo |
The surface topography of highly oriented pyrolytic graphite (HOPG) which has been subjected to anodized treatment at a low potential (less positive) has been exhaustively studied using scanning tunneling microscopy (STM). Characterization of graphite surface has revealed that a small percentage of the surface (5%-10%) shows superperiodic features. In this case, the typical topographical features are triangular networks with the observed periodicities in the plane ranging from approximately 26 to 240 nm with peak-to-peak amplitudes out of the plane extending from 7 to 35 Angstrom. We show that this triangular network can be attributed to the injection of electrolyte and solvent in the earliest stages of oxidation of the basal HOPG electrode surface. A simple model is proposed to explain this phenomenon. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Zhang JD;Wang EK.STM investigation of HOPG superperiodic features caused by electrochemical pretreatment,JOURNAL OF ELECTROANALYTICAL CHEMISTRY,1995,399(1-2):83-89 |
Palavras-Chave | #GLASSY-CARBON ELECTRODES #SCANNING-TUNNELING-MICROSCOPY #ORIENTED PYROLYTIC-GRAPHITE #ANODIC-OXIDATION #SURFACE #INTERCALATION #ACTIVATION |
Tipo |
期刊论文 |