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Morphology control, crystal growth, and growth mechanism of hierarchical tellurium (Te) microstructures

机译:碲(Te)微观结构的形态控制,晶体生长和生长机理

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Understanding the factors that influence the growth and final shape of semiconductor tellurium microstructures is important for controlling their properties. However, relative to their single-crystalline nanostructures, the growth of complex structures that are ideally composed of nanostructures arranged in a particular way can be difficult to control. Here, we developed a facile solvothermal method and successfully completed the controlled synthesis of Te particles with distinctive morphologies, including flower-like, ball-flower, nestlike, and sheetlike structures. These structures, self-assembled from nanorods and nanosheets, are systematically studied by adjusting the reaction parameters, such as the amount of NaOH, the volume ratio of EG/EN, the amount of PVP, and the reaction time. Results reveal that the morphology of Te microstructures can be easily controlled by simply altering the reaction conditions and that NaOH plays a crucial role in the final morphology of Te products. The growth mechanisms and morphology control of hierarchical Te microstructures are proposed and discussed. This is the first time to report the preparation of complex hierarchical Te microstructures through a simple solution route. This simple solution approach to fabricate hierarchical Te superstructures with controllable morphologies can be easily scaled up and potentially extended to the hierarchical assembly of building blocks of other semiconductors.
机译:了解影响半导体碲微结构的生长和最终形状的因素对于控制其性能非常重要。然而,相对于其单晶纳米结构,理想情况下由以特定方式排列的纳米结构组成的复杂结构的生长可能难以控制。在这里,我们开发了一种轻松的溶剂热方法,并成功完成了具有独特形态(包括花状,球形,巢状和片状结构)的Te粒子的受控合成。通过调整反应参数,例如NaOH的量,EG / EN的体积比,PVP的量和反应时间,系统地研究了由纳米棒和纳米片自组装而成的这些结构。结果表明,只需改变反应条件即可轻松控制Te微观结构的形态,而NaOH在Te产物的最终形态中起着至关重要的作用。提出并讨论了分层Te微结构的生长机理和形貌控制。这是第一次通过简单的解决方法报告复杂的分层Te微结构的制备。这种制造具有可控形态的分层Te上层结构的简单解决方案可以轻松扩大规模,并有可能扩展到其他半导体构件的分层组装。

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