Journal
POLYMERS
Volume 12, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/polym12010144
Keywords
hyperbranched polymers; amphibious ZnO quantum dots; blue fluorescence; bio-imaging
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Funding
- National Natural Science Foundation of China [21304001]
- Joint Fund for Fostering Talents of National Natural Science Foundation of China [U1204213]
- Henan province [U1204213]
- Project of Science and Technology Development of Henan Province [192102310298]
- Plan for Scientific Innovation Talent of Henan Province [174200510017]
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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.
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