Abstract
Optical properties of novel surface passivated Cu:Zn0.9Ni0.1O nanocomposites have been investigated. It is demonstrated that surface modification by surface directing agent polyvinyl pyrrolidone (PVP) can dramatically change shape (FESEM), size (XRD) and fluorescence emission of capped Zn0.9Ni0.1O and Cu:Zn0.9Ni0.1O nanocomposite. The band gap of the Cu:Zn0.9Ni0.1O composite readily tuned by the presence of poly vinylpyrrolidone and fluorescence emission in the ultraviolet region is enhanced more than uncapped Zn0.9Ni0.1O and capped Zn0.9Ni0.1O due to the overlapping of blue emission of PVP and blue emission property of Cu. Fluorescence life time of the Cu:Zn0.9Ni0.1O nanocomposite increased compared to uncapped Zn0.9Ni0.1O. Nitrogen adsorption/desorption studies reveals the mesoporous structure of the capped Cu:Zn0.9Ni0.1O with small pore diameter.
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