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Type: Artigo de periódico
Title: Surface chemistry of the iron tetraazamacrocycle on the aminopropyl-modified surface of oxidized n-Si(100) by AFM and XPS
Author: Magalhaes, JL
Moreira, LM
Rodrigues, UP
Giz, MJ
Pereira-da-Silva, MA
Landers, R
Vinhas, RCG
Nascente, PAP
Abstract: The structure and formation mechanisms of 3-aminopropyltrimethoxysilane (3-APTS) films deposited on wet-chemically grown silicon dioxide over n-Si(100) wafer have been examined systematically using x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The asymmetric N Is XPS spectrum for the anchored 3-APTS was fitted for -NH2 (399.6 +/- 0.3 eV) and -NH3+ (401.1 +/- 0.3 eV). Rougher surfaces are obtained by deposition from toluene solutions than from the gaseous phase. Over the 3-APTS layer was deposited the [FeTIM(CH3CN)(2)](2+) complex, where TIM is 2,3,9,10-tetramethyl-1,4,8, 11-tetraazacyclotetradeca-1,3,8,10-tetraene. The adsorption occurs by acetonitrile replacement for the-NH2-grafted group with the equatorial plane parallel to the organomodified surface. Once FeTIM can bind a CO, NO or N-heterocycle, a built-on Si wafer sensor device could be envisaged for these molecules. Copyright (C) 2002 John Wiley Sons, Ltd.
Subject: 3-aminopropyltrimethoxysilane thin films
silicon dioxide
iron tetraazamacrocycle
Country: Inglaterra
Editor: John Wiley & Sons Ltd
Citation: Surface And Interface Analysis. John Wiley & Sons Ltd, v. 33, n. 4, n. 293, n. 298, 2002.
Rights: fechado
Identifier DOI: 10.1002/sia.1186
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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