水溶液中Mn2+对硫化锌纳米粒子形貌的调控作用

利用硫代乙酰胺在水溶液中缓慢释放的S2-与Zn2+反应制备了ZnS纳米颗粒，ZnS纳米颗粒沉积吸附在3-磺酸基丙基三甲氧基硅烷自组装单层膜上。 实验发现，溶液中添加少量Mn2+，可以显著影响ZnS纳米颗粒的形貌，对ZnS纳米晶的生长方向也有重要影响。 EDS和XRD谱证实Mn2+并没有掺杂到纳米颗粒中去。 这为纳米粒子形貌的调控提供了新途径。 并对ZnS的形成过程进行了探讨，并提出了可能的影响纳米材料形貌的机制。

Influence of Mn2+ on the Morphology Control of ZnS Nanoparticles

ZnS nanoparticles on the self-assembled monolayer of 3-sulfopropyltrimethoxylsilane were fabricated by the reaction between ZnSO4 and thioacetamide in aqueous solution. It was found that a compact ZnS nanoparticle film with string-like particles was obtained when the aqueous solution contained only Zn2+. Interestingly, the morphology of ZnS nanoparticles changed from the compact film to hemispheres with herringbone-like structure when Mn2+ was added into the aqueous solution. XRD and EDS results indicated that the manganese ions were not doped into the ZnS nanoparticles. These experimental results showed that Mn2+ played a key role in the morphological control of the ZnS nanoparticles, even though Mn2+ ions were absent in the final as-prepared products. The mechanism of the formation of ZnS with Mn2+ presence was discussed.