Synthesis and characterization of nanocrystalline silver coating of fly ash cenosphere particles by electroless process

    Authors

    S. Shukla; S. Seal; S. Schwarz;D. Zhou

    Abbreviated Journal Title

    J. Nanosci. Nanotechnol.

    Keywords

    nanocrystalline silver coating; electroless coating; fly ash; cenospheres; electromagnetic interference shielding; X-ray photoelectron; spectroscopy; AG; CARBON; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials; Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

    Abstract

    Electroless nanocrystalline Ag coating of fly ash cenosphere particles utilizing a Sn-Pd catalyst system is demonstrated in this article. The deposition of pure metallic nanocrystalline Ag on the fly ash cenosphere particle surface is confirmed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) analysis. Under the described conditions of electroless coating, average nanocrystalline Ag-coating thickness is observed to be similar to220 nm, using a focused ion beam technique, which is less than that observed by transmission electron microscopy (TEM) (260-360 nm). TEM observation further reveals that the Ag-coating is made up of 50 nm Ag nanocrystallites, which is comparable with the size of similar to37 nm obtained from the XRD data. The mechanism of the electroless Ag-coating process is discussed. Ag-coated fly ash particles find applications in manufacturing conducting polymers for electromagnetic interference shielding applications.

    Journal Title

    Journal of Nanoscience and Nanotechnology

    Volume

    1

    Issue/Number

    4

    Publication Date

    1-1-2001

    Document Type

    Article

    Language

    English

    First Page

    417

    Last Page

    424

    WOS Identifier

    WOS:000174291600009

    ISSN

    1533-4880

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