State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, People's Republic of China. University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Nanotechnology. 2019 Jan 4;30(1):015702. doi: 10.1088/1361-6528/aae67e. Epub 2018 Oct 25.
A temperature-controlled synthesis process for ZnO nanoparticles (NPs) with the assist of oleylamine (OAm) has been demonstrated, and the ZnO NPs show bright fluorescence under ultraviolet illumination. In this process, zinc nitrate was firstly converted to zinc nitrate hydroxide (Zn(OH)(NO)) sheets with the assist of OAm, then the Zn(OH)(NO) was decomposed into fluorescent ZnO NPs by increasing the ambient temperature. Furthermore, information encryption has been realized based on this process. For encryption, the encrypted information cannot be observed, while the encrypted information appears when they are proceeded in the temperature of 120 °C for about one minute. The results shown in this work provide a controllable way for the synthesis of ZnO NPs by adjusting the reaction temperature, and this may inspire wide applications of ZnO in information encryption.
本文展示了一种在油胺（OAm）辅助下控制温度合成 ZnO 纳米粒子（NPs）的方法，所得 ZnO NPs 在紫外光照射下发出明亮的荧光。在该过程中，首先用 OAm 将硝酸锌转化为锌硝酸盐氢氧化物（Zn(OH)(NO)）片，然后通过升高环境温度将 Zn(OH)(NO)分解为发荧光的 ZnO NPs。此外，还基于该过程实现了信息加密。对于加密，加密信息无法被观察到，但当它们在 120°C 的温度下处理大约一分钟时，加密信息就会显现出来。本工作的结果为通过调节反应温度来可控合成 ZnO NPs 提供了一种方法，这可能会激发 ZnO 在信息加密方面的广泛应用。
