TITLE:
A New Simple Route to ZnS Quantized Particles with Tunable Size and Shape, and Size/Shape-Dependent Optical Properties
AUTHORS:
Pengfei Hu, Yali Cao, Yanyan Lou, Bo Lu, Min Shao, Jiansen Ni, Meng Cao
KEYWORDS:
Solid-State Nanosynthesis; Tunable; Size- and Shape-Dependence; Optical Properties
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.3 No.1,
March
27,
2013
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.