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    Studies on the effect of solvents on self-assembled monolayers formed from organophosphonic acids on indium tin oxide

    Access Status
    Fulltext not available
    Authors
    Chen, X.
    Luais, E.
    Darwish, Nadim
    Ciampi, S.
    Thordarson, P.
    Gooding, J.
    Date
    2012
    Type
    Journal Article
    
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    Citation
    Chen, X. and Luais, E. and Darwish, N. and Ciampi, S. and Thordarson, P. and Gooding, J. 2012. Studies on the effect of solvents on self-assembled monolayers formed from organophosphonic acids on indium tin oxide. Langmuir. 28 (25): pp. 9487-9495.
    Source Title
    Langmuir
    DOI
    10.1021/la3010129
    ISSN
    0743-7463
    School
    Nanochemistry Research Institute
    URI
    http://hdl.handle.net/20.500.11937/11757
    Collection
    • Curtin Research Publications
    Abstract

    The preparation of self-assembled monolayers (SAMs) of organophosphonic acids on indium tin oxide (ITO) surfaces from different solvents (triethylamine, ethyl ether, tetrahydofuran (THF), pyridine, acetone, methanol, acetonitrile, dimethyl sulfoxide (DMSO), or water) has been performed with some significant differences observed. Cyclic voltammetry (CV), X-ray photoelectron spectroscopy (XPS), scanning tunneling microscopy (STM), and contact angle measurement demonstrated that the quality of SAMs depends critically on the choice of solvents. Higher density, more stable monolayers were formed from solvents with low dielectric constants and weak interactions with the ITO. It was concluded low dielectric solvents that were inert to the ITO gave monolayers that were more stable with a higher density of surface bound molecules because higher dielectric constant solvents and solvents that coordinate with the surface disrupted SAM formation.

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