首页|Single-step synthesis of sub-stoichiometric tungsten oxide particles in mixed acetic and oleic acids: Structural conversion and photoluminescence enhancement
Single-step synthesis of sub-stoichiometric tungsten oxide particles in mixed acetic and oleic acids: Structural conversion and photoluminescence enhancement
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NSTL
Elsevier
Sub-stoichiometric tungsten oxide (i.e., WO3-x) materials are advanced multipurpose semiconducting materials. However, it is still a challenge to tune their structure and morphology. Here we report the structural and morphological conversion and the photoluminescence (PL) enhancement of the WO3-x materials synthesized in the mixed acetic and oleic acids using tungsten hexachloride precursor. We demonstrate the structural conversion from nanorods to nanodots, accompanied by the morphological change from the mushroom-like particles to the spherical particles. Importantly, the PL emission from the particles aggregated by the WO3-x nanodots is much stronger than the particles aggregated by the WO3-x nanorods. The structural and morphological conversion mechanism is related to the growth rate reduction of WO3-x nuclei and the steric repulsion effect, which are caused by oleic acid. The PL enhancement arises from the reduction of non-radiative recombination caused by the structural conversion and the surface passivation of WO3-x nanodots caused by oleic acid. These results contribute to the commonly needed ability to control the structure of metal oxide nanomaterials and to the development of next-generation functionalities and devices for energy, electronics, optics, and other fields.
Wang B.B.、Zhong X.X.、Zhu J.、Zhang Y.、Cvelbar U.、Ostrikov K.
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College of Chemistry and Chemical Engineering Chongqing University of Technology
State Key Laboratory of Advanced Optical Communication and Networks Key Laboratory for Laser Plasmas (Ministry of Education) School of Physics and Astronomy Shanghai Jiao Tong University
School of Chemistry and Chemical Engineering Yangzhou University
Jozef Stefan Institute
School of Chemistry and Physics Queensland University of Technology
NSTL
Elsevier
