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    Measurements on hydrophobic and hydrophilic surfaces using a porous gamma alumina nanoparticle aggregate mounted on Atomic Force Microscopy cantilevers

    133144_14842_Measurements_on_hydrophobic_and_hydrophilic_surfaces_using_porous_gamma.pdf (88.28Kb)
    Access Status
    Open access
    Authors
    Das, T.
    Becker, Thomas
    Nair, Balagopal
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Das, Theerthankar and Becker, Thomas and Nair, Balagopal. 2009. Measurements on hydrophobic and hydrophilic surfaces using a porous gamma alumina nanoparticle aggregate mounted on Atomic Force Microscopy cantilevers. Thin Solid Films. 518: pp. 2769-2774.
    Source Title
    Thin Solid Films
    DOI
    10.1016/j.ejcnurse.2008.12.001
    ISSN
    0040-6090
    Faculty
    Nanochemistry Research Institute (NRI)
    Faculty of Science and Engineering
    School
    Nanochemistry Research Institute (Research Institute)
    Remarks

    The link to the journal’s home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/622273/description#description. Copyright © 2009 Elsevier B.V. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/20014
    Collection
    • Curtin Research Publications
    Abstract

    Atomic Force Microscopy (AFM) measurements are extensively used for a detailed understanding ofmolecular and surface forces. In this study, we present a technique for measuring such forces, using an AFM cantilever attached with a porous gamma alumina nanoparticle aggregate. The modified cantilever was used to measure the forces of interaction of the aggregate with hydrophilic and hydrophobic surfaces. A strong force of attraction was observed between the aggregate and hydrophilic surfaces when the aggregate was kept dry. However, the force of interaction on the aggregate in wet form (water filled in pores) was larger when the adjoining surface had hydrophobic characteristics. The results presented in this study show the versatility of the current technique and indicate its usefulness in directly characterizing hydrophilic/ hydrophobic properties of nano-scale surfaces and patterns.

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