Anchoring ceria nanoparticles on reduced graphene oxide and their electronic transport properties

Daeha Joung, Virendra Singh, Sanghoon Park, Alfons Schulte, Sudipta Seal, Saiful I. Khondaker

Research output: Contribution to journalArticlepeer-review

98 Scopus citations

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 hydrazinetoyield 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 compo- sites due to the electrostatic interaction between the localized electrons in oxygen vacancy sites of CNPs and mobile holes in RGO.

Original languageEnglish (US)
Pages (from-to)24494-24500
Number of pages7
JournalJournal of Physical Chemistry C
Volume115
Issue number50
DOIs
StatePublished - Dec 22 2011
Externally publishedYes

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