Title

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

Authors

Authors

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

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

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

Share

COinS