Improving surfactant grafting in magnetic colloids

    Authors

    K. Z. Chen; A. F. Bakuzis;W. L. Luo

    Comments

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    Abbreviated Journal Title

    Appl. Surf. Sci.

    Keywords

    magnetic colloids; grafting number; nanostructures; RAMAN-SPECTROSCOPY; FLUIDS; COBALT; Chemistry, Physical; Materials Science, Coatings & Films; Physics, ; Applied; Physics, Condensed Matter

    Abstract

    The grafting number of surfactant coating on magnetite nanoparticles in a magnetic colloid (magnetic fluid), defined as the number of surfactant molecules adsorbed per surface area of nanoparticles, was successfully obtained from the atomic absorption spectroscopy and transmission electron microscopy. We found that the increases of grafting number with the molar concentration of surfactant and the adsorption temperature can be quantitatively measured, making it possible to produce well controlled, stable magnetic colloids that are precursors for many magnetic nanostructures. (c) 2006 Elsevier B.V. All rights reserved.

    Journal Title

    Applied Surface Science

    Volume

    252

    Issue/Number

    18

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    6379

    Last Page

    6382

    WOS Identifier

    WOS:000239735100039

    ISSN

    0169-4332

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