1. In Situ Preparation of Amphibious ZnO Quantum Dots with Blue Fluorescence Based on Hyperbranched Polymers and their Application in Bio-Imaging.
- Author
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Lei, Gaiying, Yang, Shu, Cao, Ranran, Zhou, Peng, Peng, Han, Peng, Rui, Zhang, Xiaoming, Yang, Yujiao, Li, Yueyang, Wang, Mengyue, He, Yaru, Zhou, Linzhu, Du, Jimin, Du, Weimin, Shi, Yunfeng, and Wu, Hankui
- Subjects
QUANTUM dots ,FLUORESCENCE ,ZINC oxide ,POLYMERS ,GENE transfection ,BLUE - Abstract
A new strategy for preparing amphibious ZnO quantum dots (QDs) with blue fluorescence within hyper-branched poly(ethylenimine)s (HPEI) was proposed in this paper. By changing [Zn
2+ ]/[OH− ] molar ratio and heating time, ZnO QDs with a quantum yields (QY) of 30% in ethanol were obtained. Benefiting from the amphibious property of HPEI, the ZnO/HPEI nanocomposites in ethanol could be dissolved in chloroform and water, acquiring a QY of 53%, chloroform and 11% in water. By this strategy, the ZnO/HPEI nano-composites could be applied in not only in optoelectronics, but also biomedical fields (such as bio-imaging and gene transfection). The bio-imaging application of water-soluble ZnO/HPEI nanocomposites was investigated and it was found that they could easily be endocytosed by the COS-7 cells, without transfection reagent, and they exhibited excellent biological imaging behavior. [ABSTRACT FROM AUTHOR]- Published
- 2020
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