In Situ Preparation of Amphibious ZnO Quantum Dots with Blue Fluorescence Based on Hyperbranched Polymers and their Application in Bio-Imaging
oleh: Gaiying Lei, Shu Yang, Ranran Cao, Peng Zhou, Han Peng, Rui Peng, Xiaoming Zhang, Yujiao Yang, Yueyang Li, Mengyue Wang, Yaru He, Linzhu Zhou, Jimin Du, Weimin Du, Yunfeng Shi, Hankui Wu
| Format: | Article |
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| Diterbitkan: | MDPI AG 2020-01-01 |
Deskripsi
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<sup>2+</sup>]/[OH<sup>−</sup>] 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.