Pressure-induced transition-temperature reduction in ZnS nanoparticles
Pressure-induced transition-temperature reduction in ZnS nanoparticles
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DOI：
10.1088/0957-4484/19/9/095704
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发表时间：
2008-03
期刊：
影响因子：
3.5
通讯作者：
Cuizhuo Yang;Yanguo Liu;Hongyu Sun;D. Guo;Xiaohong Li;Wei Li;Bao-ting Liu;Xiangyi Zhang
中科院分区：
文献类型：
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作者：
Cuizhuo Yang;Yanguo Liu;Hongyu Sun;D. Guo;Xiaohong Li;Wei Li;Bao-ting Liu;Xiangyi Zhang
纳米级材料结构转变的研究因其潜在应用而受到特别关注。在本研究中，我们观察到在 1 GPa 压力下，ZnS 纳米颗粒从闪锌矿结构到纤锌矿结构的相变温度 T = 250 °C，而 ZnS 纳米颗粒和块状 ZnS 在常压下的 T = 400 和 1020 °C 分别为 T = 400 和 1020 °C。转变温度降低是由于施加的压力导致颗粒与颗粒之间紧密接触，从而改变了纳米颗粒的表面（或界面）环境，从而改变了它们的表面（或界面）能量。
The study of the structural transition in nanoscale materials is of particular interest for their potential applications. In the present study, we have observed a lower temperature T = 250 °C for the phase transition from the sphalerite structure to the wurtzite structure in ZnS nanoparticles under a pressure of 1 GPa, as compared to those, T = 400 and 1020 °C, for ZnS nanoparticles and bulk ZnS under normal pressure, respectively. The reduced transition temperature is attributed to the applied pressure leading to tight particle–particle contacts, which change the surface (or interfacial) environment of the nanoparticles and thus their surface (or interfacial) energy.