Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/32175
Title: Modification of optical properties in ZnO particles by surface deposition and anchoring of NiO nanoparticles
Authors: Rubio Marcos, Fernando, Manzano, Cristina V., Reinosa, Julián J., Lorite, Israel, Romero Fanego, Juan José, Fernández Lozano, José Francisco, Martín-González, Marisol S.
Keywords: Zinc oxide
Nanoparticles
Surface
Photoluminescence
Issue Date: 30-Nov-2010
Publisher: Elsevier
Abstract: Nanodispersion of NiO nanoparticles on the surface of ZnO microparticles has been carried out by means of a low energy dry mixing method. This method keeps the shape and size of the ZnO microparticles that served as support to hold the NiO nanoparticles. The dispersion and anchoring of the NiO nanoparticles takes place by means of an electrochemical reaction with the OH-groups present at the ZnO surface. The process took place at room temperature and cation interdiffusion between ZnO and NiO have not been detected by structural analysis. Nevertheless, changes in the optical properties of semiconductor ZnO particles have been observed due to the deposition of the nanoparticles. These changes correlate with the amount of NiO nanoparticles at the ZnO particle surface. The amount of defects, i.e oxygen vacancies, interstitial oxygen and zinc vacancies, rises with the increasing NiO content.
Publisher version (URL): http://dx.doi.org/10.1016/j.jallcom.2010.11.149
URI: http://hdl.handle.net/10261/32175
ISSN: 0925-8388
Citation: Journal of Alloys and Compounds 509 (2011)
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