Synthesis, Magnetic Characterization, and Sensing Applications of Novel Dextran-Coated Iron Oxide Nanorods

    Authors

    S. Nath; C. Kaittanis; V. Ramachandran; N. S. Dalal;J. M. Perez

    Comments

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    Abbreviated Journal Title

    Chem. Mat.

    Keywords

    MODIFIED SUPERPARAMAGNETIC NANOPARTICLES; MOLECULAR-INTERACTIONS; CDSE; NANOCRYSTALS; RELAXATION; GROWTH; PARTICLES; UNIFORM; SHAPE; Chemistry, Physical; Materials Science, Multidisciplinary

    Abstract

    Monodisperse, water-soluble dextran-coated iron oxide (Fe(3)O(4)) nanorods were synthesized using a facile and scalable approach. Our room temperature method involves the mixing of an acidic solution of iron salts with a basic solution of ammonium hydroxide to facilitate initial formation of iron oxide crystals. The stability, crystallinity, and shape of these nanorods depends on the time of addition of the dextran, as well as the degree of purity of the polymer. The as-synthesized nanorods exhibit unique magnetic properties, including superparamagnetic behavior and high spin-spin water relaxivity (R2). Additionally, they possess enhanced peroxidase-like activity when compared to those reported in the literature for spherical iron oxide nanoparticles. Thus, this high yield synthetic method for polymer-coated iron oxide nanorods will expedite their use in applications from magnetic sensors, devices, and nanocomposites with magnetic and catalytic properties.

    Journal Title

    Chemistry of Materials

    Volume

    21

    Issue/Number

    8

    Publication Date

    1-1-2009

    Document Type

    Article

    Language

    English

    First Page

    1761

    Last Page

    1767

    WOS Identifier

    WOS:000265412400046

    ISSN

    0897-4756

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