Photoinduced reversible shape conversion of silver nanoparticles assisted by TiO2

Bin Tang; Mingwen Zhang; Ya Yao; Lu Sun; Jingliang Li; Shuping Xu; Wu Chen; Weiqing Xu; Xungai Wang

doi:10.1039/C4CP02874K

Photoinduced reversible shape conversion of silver nanoparticles assisted by TiO₂†

Bin Tang,^ab Mingwen Zhang,^b Ya Yao,^a Lu Sun,^b Jingliang Li,^b Shuping Xu,^c Wu Chen,^a Weiqing Xu^c and Xungai Wang*^ab

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* Corresponding authors

^a School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430073, China

^b Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
E-mail: xungai.wang@deakin.edu.au
Fax: +61 3 5227 2539
Tel: +61 3 5227 2894

^c State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China

Abstract

Silver nanoprisms were transformed into nanodecahedra through photoinduction of ultraviolet (UV) light in the presence of titanium dioxide (TiO₂) quantum dots (QDs). Subsequently, the silver nanodecahedra were reconverted to silver nanoprisms under sodium lamp if there was sufficient citrate in the reaction system. The localized surface plasmon resonance (LSPR) optical properties of silver nanoparticles were tuned during photoinduced shape conversion. The photocatalytic activity of TiO₂ QDs assisted the conversion of prisms to decahedra upon UV light irradiation. Nevertheless, the presence of TiO₂ did not inhibit the photoinduced reconversion from decahedra to prisms by sodium light. It was demonstrated that citrate was indispensable in the photoinduction process. In addition, oxygen in solution played a vital role in the reversible shape conversion of silver nanoparticles. Moreover, simulated sunlight can convert silver nanoprisms to nanodecahedra instead of UV light with assistance of TiO₂ QDs, which would promote the photoinduced reaction of silver nanoparticles based on a natural light source.

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Article information

DOI: https://doi.org/10.1039/C4CP02874K
Article type: Paper
Submitted: 01 Jul 2014
Accepted: 28 Aug 2014
First published: 29 Aug 2014

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Phys. Chem. Chem. Phys., 2014,16, 21999-22007

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Photoinduced reversible shape conversion of silver nanoparticles assisted by TiO₂

B. Tang, M. Zhang, Y. Yao, L. Sun, J. Li, S. Xu, W. Chen, W. Xu and X. Wang, Phys. Chem. Chem. Phys., 2014, 16, 21999 DOI: 10.1039/C4CP02874K

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