A New Simple Route to ZnS Quantized Particles with Tunable Size and Shape, and Size/Shape-Dependent Optical Properties

Pengfei Hu, Yali Cao, Yanyan Lou, Bo Lu, Min Shao, Jiansen Ni, Meng Cao

Institute of Applied Chemistry, Xinjiang University, Urumqi, China..
Laboratory for Microstructures, Shanghai University, Shanghai, China.
Laboratory for Microstructures, Shanghai University, Shanghai, China..
School of Materials Science and Engineering, Shanghai University, Shanghai, China..

DOI: 10.4236/ampc.2013.31003                

Abstract

With the features of convenience and eco-friendly, the low-temperature solid-state reaction synthesis was successfully developed as a new approach to prepare quantum-sized ZnS nanocrystals. One major achievement is that the size and shape of ZnS nanocrystals can be tuned by adjusting the surfactant and its feed. The UV-Vis absorption spectra of quasispherical and one-dimensional quantum-sized ZnS nanocrystals all showed a blue-shift from the bulk counterpart, indicating large quantum confinement effects of ZnS nanocrystals. These ZnS nanocrystals all showed well-defined excitonic emission features. Contrastive studies on photoluminescence performances indicated that the bandedge emission experienced only the size-dependent quantum confinement effect, while the trap-state emission experienced the size- and shape-dependences. So we can design a purposeful synthesis route to ZnS nanocrystals with target luminescence emission performances.

 

Keywords

Solid-State Nanosynthesis; Tunable; Size- and Shape-Dependence; Optical Properties

Conflicts of Interest

The authors declare no conflicts of interest.

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