Characterization of Indium−Tin Oxide Interfaces Using X-ray Photoelectron Spectroscopy and Redox Processes of a Chemisorbed Probe Molecule: Effect of Surface Pretreatment Conditions

Autor:	David C. Paine, Neal R. Armstrong, Darren R. Dunphy, Chet Carter, Dana M. Alloway, Paul A. Lee, Ken W. Nebesny, Carrie L. Donley
Rok vydání:	2001
Předmět:	Plasma etching Chemistry Inorganic chemistry Analytical chemistry Oxide Surfaces and Interfaces Condensed Matter Physics Redox Indium tin oxide chemistry.chemical_compound X-ray photoelectron spectroscopy Sputtering Electrochemistry General Materials Science Thin film Spectroscopy Stoichiometry
Zdroj:	Langmuir. 18:450-457
ISSN:	1520-5827 0743-7463
Popis:	Surface characterization of indium−tin oxide (ITO) thin films has been carried out with monochromatic X-ray photoelectron spectroscopy (XPS) following various solution pretreatments, RF air plasma etching or high-vacuum argon-ion sputtering. Commercially available ITO films show high concentrations of hydrolyzed oxides and oxy-hydroxides in the near-surface region, along with stoichiometric oxide (In2O3, SnO2) and variable levels of oxygen defect sites. XPS revealed that solution and vacuum treatments changed both the relative surface coverage of the hydroxides and, to a lesser extent, the concentration of oxide defect sites in the near-surface region. These pretreatments have a significant effect on both the coverage and electron-transfer rates for chemisorbed ferrocene dicarboxylic acid (Fc(COOH)2), with the air-plasma-etched ITO showing the highest surface coverage of Fc(COOH)2 and an RCA treatment showing the highest electron-transfer rates.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a83d3d8e88024fd8c89023f961bfb6eb https://doi.org/10.1021/la011101t Zobrazit plný text záznamu