title: Photoinduced reversible shape conversion of silver nanoparticles assisted by TiO₂.
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.
authors.affiliation: School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430073, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Tang
authors.forename: Mingwen
authors.initials: M
authors.lastname: Zhang
authors.forename: Ya
authors.initials: Y
authors.lastname: Yao
authors.forename: Lu
authors.initials: L
authors.lastname: Sun
authors.forename: Jingliang
authors.initials: J
authors.lastname: Li
authors.forename: Shuping
authors.initials: S
authors.lastname: Xu
authors.forename: Wu
authors.initials: W
authors.lastname: Chen
authors.forename: Weiqing
authors.initials: W
authors.lastname: Xu
authors.forename: Xungai
authors.initials: X
authors.lastname: Wang
mesh_terms: D053768:Metal Nanoparticles / Q000737:chemistry*; D055668:Photochemical Processes; D045663:Quantum Dots; D012834:Silver / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: C009495:titanium dioxide; D012834:Silver; D014025:Titanium