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Open AccessArticle

A Mechanochemical Route for ZnS Nanocrystals, and Batch Sorting along Size Distribution

Laboratory for Microstructures, Shanghai University, Shanghai 200444, China
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Nanomaterials 2019, 9(9), 1325; https://doi.org/10.3390/nano9091325
Received: 21 August 2019 / Revised: 6 September 2019 / Accepted: 9 September 2019 / Published: 15 September 2019
The assistances of sodium dodecyl benzene sulfonate (SDBS) and aging treatment were introduced to further improve the room-temperature mechanochemical synthesis of the quantum-sized zinc sulfide (ZnS) nanocrystals. As a result, a green strategy for synthesizing the monodisperse nanocrystals with tunable size and crystallinity was developed, holding convenient, highly efficient and low pollution. Size evolution shows a gradually increasing trend along the aging-temperature. A model that the independent reaction cells constructed by SDBS-wrapped reactant packages (solid state vesicles, SSVs) for the confined growth of ZnS nanocrystals was proposed to access the formation mechanism of ZnS quantized crystal in a solid-state synthesis system. The band gaps and band-edge luminescent emissions of as-prepared ZnS nanocrystals experienced the size-dependent quantum confinement effect, while the trap-state emissions exhibited the lattice integrity-dependence. Furthermore, ZnS quantum-sized nanocrystals with narrower size distribution can be obtained by a batch-sorting process through adjusting the centrifugal speed. View Full-Text
Keywords: nanocrystals; mechanochemical synthesis; solid state vesicles; batch-sorting; size evolution; size-dependent property nanocrystals; mechanochemical synthesis; solid state vesicles; batch-sorting; size evolution; size-dependent property
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MDPI and ACS Style

Hu, P.; Xie, C.; Mao, Z.; Liang, X. A Mechanochemical Route for ZnS Nanocrystals, and Batch Sorting along Size Distribution. Nanomaterials 2019, 9, 1325.

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