Synthesis of ZnO Nanoparticles with Controlled Shapes, Sizes, Aggregations, and Surface Complex Compounds for Tuning or Switching the Photoluminescence
Synthesis of ZnO Nanoparticles with Controlled Shapes, Sizes, Aggregations, and Surface Complex Compounds for Tuning or Switching the Photoluminescence
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DOI：
10.1021/cg5017017
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发表时间：
2015-05
影响因子：
3.8
通讯作者：
Jianhui Zhang;Baodan Zhao;Zhongda Pan;Minhao Gu;A. Punnoose
中科院分区：
文献类型：
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作者：
Jianhui Zhang;Baodan Zhao;Zhongda Pan;Minhao Gu;A. Punnoose
电子能量转移（EET）通常会引起荧光自猝灭，但它已被积极用于调节和/或切换 ZnO 纳米颗粒（NP）的光致发光（PL）。由于 EET 对颗粒间分离敏感，因此合成了尺寸可调的单分散 ZnO 纳米球、棒、三脚架和簇，以可重复且精细地控制 NP 聚集。这些纳米颗粒与其分散介质之间的复杂反应已被用来进一步控制 EET 来调节 ZnO PL。通过改变 NP 浓度、形状和/或簇尺寸，分散在酒精或水中的 ZnO NP 的带边 UV PL 的强度和峰位置都会发生变化，并诱导出强度可调节的新蓝色发射，波长约为 418、435 和 468 nm。 X射线衍射图以及红外、PL、吸收和拉曼光谱证实，这里制备的ZnO NPs可以与乙醇缓慢反应，形成新的复合ZnO-(C2H5OH)n，这改变了...
The electronic energy transfer (EET) usually induces the fluorescence self-quenching, but it has been positively used here to tune and/or switch the photoluminescence (PL) of ZnO nanoparticles (NPs). Monodisperse ZnO nanospheres, rods, tripods, and clusters with tunable sizes have been synthesized to reproducibly and finely control the NP aggregation because EET is sensitive to the interparticle separation. The complex reactions between these NPs and their dispersion media have been used to further control the EET for tuning the ZnO PL. By changing the NP concentrations, shapes, and/or the cluster sizes, the band-edge UV PL of the ZnO NPs dispersed in alcohol or water is modified in both intensity and peak position, and new blue emissions with tunable intensity around 418, 435, and 468 nm are induced. As confirmed by the X-ray diffraction patterns and the infrared, PL, absorption, and Raman spectra, the ZnO NPs made here can slowly react with ethanol to form a new composite ZnO–(C2H5OH)n, which changes th...