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

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...

Descripción completa

Detalles Bibliográficos
Autores principales: 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, Wu, Hankui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7023060/
https://www.ncbi.nlm.nih.gov/pubmed/31935952
http://dx.doi.org/10.3390/polym12010144
Descripción
Sumario: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.

Ejemplares similares