Anchoring Ceria Nanoparticles on Reduced Graphene Oxide and Their Electronic Transport Properties

    Authors

    D. Joung; V. Singh; S. Park; A. Schulte; S. Seal;S. I. Khondaker

    Comments

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    Abbreviated Journal Title

    J. Phys. Chem. C

    Keywords

    CARBON NANOTUBES; RAMAN-SPECTROSCOPY; HYBRID MATERIALS; GRAPHITE OXIDE; SHEETS; FILMS; NANOCOMPOSITES; TRANSPARENT; COMPOSITES; VACANCY; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

    Abstract

    We report a simple scheme of anchoring crystalline ceria nanoparticles (CNPs) onto reduced graphene oxide (RGO) sheets. Two types of CNPs, consisting of predominantly either Ce(3+) or Ce(4+) valence states, were mixed with GO suspended in water, with simultaneous reduction using hydrazine to yield CNP/RGO composite. Structural and surface characterizations reveal a strong electrostatic interaction between the CNPs and the RGO. Electrical characterizations show that with increased oxygen vacancies from Ce(4+) to Ce(3+) states the predominantly ambipolar RGO transforms to n-type CNP/RGO composites due to the electrostatic interaction between the localized electrons in oxygen vacancy sites of CNPs and mobile holes in RGO.

    Journal Title

    Journal of Physical Chemistry C

    Volume

    115

    Issue/Number

    50

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    24494

    Last Page

    24500

    WOS Identifier

    WOS:000297947700007

    ISSN

    1932-7447

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