Quasi‐polyhedral ZnS nanocrystals with monodisperse tunable sizes of 40, 52, 62, 73, 82, 94, 103, and 110 nm have been synthesized in aqueous solution by regulating the amounts of thioacetamide, zinc acetate, and acetic acid added. The mixture was heated to 120°C in an oven for 10–20 min to produce the nanocrystals. Structural characterization reveals the formation of cubic zinc blende ZnS with some polycrystallinity, which possibly influences their optical properties, that is, the measured band gaps do not give a continuous narrowing trend with increasing particle size. However, when particle sizes are expressed in terms of volumes, the absorption band positions show steady red shifts with increasing crystal dimensions and very small wavelength changes for nanocrystals beyond 90 nm. Thus, these ZnS nanocrystals still possess some size‐dependent optical properties despite their polycrystalline nature.

中文翻译：

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尺寸可调的锌共混物ZnS纳米晶体的合成

通过调节硫代乙酰胺，乙酸锌和乙酸的添加量，已在水溶液中合成了具有40、52、62、73、82、94、103和110 nm单分散可调尺寸的准多面体ZnS纳米晶体。将混合物在烘箱中加热至120°C，持续10-20分钟，以产生纳米晶体。结构表征揭示了具有一些多结晶度的立方锌共混物ZnS的形成，这可能会影响其光学性能，也就是说，所测量的带隙不会随着粒径的增加而呈现连续的变窄趋势。但是，当以体积表示粒度时，吸收带位置会随晶体尺寸的增加而出现稳定的红移，而超过90 nm的纳米晶体的波长变化非常小。因此，