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In Situ Preparation of Amphibious ZnO Quantum Dots with Blue Fluorescence Based on Hyperbranched Polymers and their Application in Bio-Imaging

by Gaiying Lei 1,†, Shu Yang 2,3,†, Ranran Cao 2,3,†, Peng Zhou 2,3, Han Peng 2,3, Rui Peng 2,3, Xiaoming Zhang 2,3, Yujiao Yang 2,3, Yueyang Li 2,3, Mengyue Wang 2,3, Yaru He 2,3, Linzhu Zhou 4, Jimin Du 2,3, Weimin Du 2,3, Yunfeng Shi 2,3,* and Hankui Wu 2,3,*
1
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
2
School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, China
3
Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455000, China
4
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
*
Authors to whom correspondence should be addressed.
These authors are joint first authors.
Polymers 2020, 12(1), 144; https://doi.org/10.3390/polym12010144
Received: 24 November 2019 / Revised: 24 December 2019 / Accepted: 1 January 2020 / Published: 6 January 2020
(This article belongs to the Section Polymer Applications)
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 [Zn2+]/[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. View Full-Text
Keywords: hyperbranched polymers; amphibious ZnO quantum dots; blue fluorescence; bio-imaging hyperbranched polymers; amphibious ZnO quantum dots; blue fluorescence; bio-imaging
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MDPI and ACS Style

Lei, G.; Yang, S.; Cao, R.; Zhou, P.; Peng, H.; Peng, R.; Zhang, X.; Yang, Y.; Li, Y.; Wang, M.; He, Y.; Zhou, L.; Du, J.; Du, W.; Shi, Y.; Wu, H. In Situ Preparation of Amphibious ZnO Quantum Dots with Blue Fluorescence Based on Hyperbranched Polymers and their Application in Bio-Imaging. Polymers 2020, 12, 144.

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