Organic-to-water dispersible Mn:ZnS–ZnS doped core–shell quantum dots: synthesis, characterization and their application towards optical bioimaging and a turn-off fluorosensor

Selvaraj, Joicy; Mahesh, Arun; Vaseeharan, Baskaralingam; Dhayalan, Arunkumar; Thangadurai, P.

doi:10.1039/c9nj02222h

Cited by 11 publications

(1 citation statement)

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“…The above characteristics of fluorescence emission peaks reflect the small size and narrow distribution of this batch-sorting sample, and the high defect density of the small size nanocrystals possibly due to their immaturity. The fluorescence quantum yield (FLQY) of the sample Q-ZnS-I′-ii was 37.32% (L-tyrosine as reference), which is at the high level of FLQY of ZnS quantum dots or its derivatives reported in the literature [28,29]. Among them, quantum dots prepared by the liquid-phase pathway are the main ones.…”

Section: Resultsmentioning

confidence: 80%

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

Xie

Mao

et al. 2019

Nanomaterials

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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.

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Section: Resultsmentioning

confidence: 80%