Anchoring Ceria Nanoparticles on Reduced Graphene Oxide and Their Electronic Transport Properties
Abbreviated Journal Title
J. Phys. Chem. C
CARBON NANOTUBES; RAMAN-SPECTROSCOPY; HYBRID MATERIALS; GRAPHITE OXIDE; SHEETS; FILMS; NANOCOMPOSITES; TRANSPARENT; COMPOSITES; VACANCY; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary
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 of Physical Chemistry C
"Anchoring Ceria Nanoparticles on Reduced Graphene Oxide and Their Electronic Transport Properties" (2011). Faculty Bibliography 2010s. 1446.