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Photoinduced reversible shape conversion of silver nanoparticles assisted by TiO₂.
journal contributionposted on 2014-10-28, 00:00 authored by Bin TangBin Tang, Mingwen Zhang, Y Yao, Lu Sun, Jingliang LiJingliang Li, S Xu, W Chen, W Xu, Xungai Wang
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.
JournalPhysical Chemistry Chemical Physics
Pagination21999 - 22007
PublisherRoyal Society of Chemistry Publications
LocationCambridge, United Kingdom
Publication classificationC Journal article; C1 Refereed article in a scholarly journal
Copyright notice2014, Royal Society of Chemistry Publications
CategoriesNo categories selected
Science & TechnologyPhysical SciencesChemistry, PhysicalPhysics, Atomic, Molecular & ChemicalChemistryPhysicsSURFACE-PLASMON RESONANCEOPTICAL-PROPERTIESTITANIUM-DIOXIDEPHOTOCATALYTIC DEGRADATIONMULTICOLOR PHOTOCHROMISMPHOTOMEDIATED SYNTHESISANATASE TIO2SIZENANOPRISMSEVOLUTIONGROWTHRECONSTRUCTIONTRANSFORMATIONSPECTROSCOPYIRRADIATION