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Open Access Highly Accessed Nano Express

Facile synthesis and optical properties of polymer-laced ZnO-Au hybrid nanoparticles

XianHong Wang1, XiaoYan Zhang1, WenZheng Cheng1, HongQin Shao1, Xiao Liu1, XueMei Li1, HongLing Liu1* and JunHua Wu2*

Author Affiliations

1 Key Lab of Polyoxometalate Chemistry of Henan Province, Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, China

2 Pioneer Research Center for Biomedical Nanocrystals, Korea University, Seoul 136-713, South Korea

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Nanoscale Research Letters 2014, 9:109  doi:10.1186/1556-276X-9-109

Published: 7 March 2014

Abstract

Bi-phase dispersible ZnO-Au hybrid nanoparticles were synthesized via one-pot non-aqueous nanoemulsion using the triblock copolymer poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) as the surfactant. The characterization shows that the polymer-laced ZnO-Au nanoparticles are monosized and of high crystallinity and demonstrate excellent dispersibility and optical performance in both organic and aqueous medium, revealing the effects of quantum confinement and medium. The findings show two well-behaved absorption bands locating at approximately 360 nm from ZnO and between 520 and 550 nm from the surface plasmon resonance of the nanosized Au and multiple visible fingerprint photoluminescent emissions. Consequently, the wide optical absorbance and fluorescent activity in different solvents could be promising for biosensing, photocatalysis, photodegradation, and optoelectronic devices.