Web Release Date: February 23,
Controlled Construction of Monodisperse La2(MoO4)3:Yb,Tm Microarchitectures with Upconversion Luminescent Property
and
State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China, and Graduate School of the Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
Received: November 27, 2007
Abstract:
Monodisperse La2(MoO4)3:Yb,Tm microarchitectures with uniform waxberry-like morphology have been successfully constructed in large scale by a facile surfactant-assisted hydrothermal route, in which sodium lauryl sulfate (SLS) was used as the structure directing agent. It was found that the pH value was a crucial factor controlling the phase composition and purity, which was unaffected by surfactant SLS. The growth process of these waxberry-shaped microarchitectures has been examined in detail, and it was proved that a special dissolution-recrystallization transformation mechanism as well as a preferential adsorption of SLS process was responsible for the morphology evolution of the La2(MoO4)3:Yb,Tm microarchitectures. A mechanism for the formation of the waxberry-shape La2(MoO4)3:Yb,Tm microarchitectures was put forward. The specially shaped architectures showed blue up-conversion emission properties.
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