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Controllable growth of ZnO microcrystals by a capping-molecule-assisted hydrothermal process

机译:封端分子辅助水热法可控地生长ZnO微晶

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摘要

Different shapes of ZnO microcrystals have been achieved controllably by a capping-molecule-assisted hydrothermal process. The flowerlike, disklike, and dumbbell-like ZnO microcrystals of hexagonal phase have been obtained respectively using ammonia, citric acid (CA), and poly(vinyl alcohol) (PVA) as the capping molecules. Only a very strong UV emission at similar to 380 nm is observed in the photoluminescence (PL) spectra of the three kinds of ZnO microcrystals, indicative of their high crystal quality. The formation mechanisms for the hydrothermally synthesized microcrystals in different morphologies have been phenomenologically presented.
机译:通过封端分子辅助水热法可控地获得了不同形状的ZnO微晶。使用氨,柠檬酸(CA)和聚乙烯醇(PVA)作为封端分子,分别获得了六方相的花状,盘状和哑铃状ZnO微晶。三种ZnO微晶的光致发光(PL)光谱中仅观察到非常强的类似于380 nm的UV发射,表明它们的高晶体质量。现象学上介绍了不同形态的水热合成微晶的形成机理。

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