Structure, luminescence, and bioimaging of bimetallic CuAu nanoclusters
| Autor: | Haile Liu, Junying Wang, Haitao Dai, Qian Wang, Yaqi Jing, Changlong Liu, Hua He, Xiaodong Zhang, Xiaoyu Mu, Lingfang Liu, Fujuan Xu, Xueting Bai, Haixia Liu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Photoluminescence Organic Chemistry Nanotechnology 02 engineering and technology Electronic structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence Atomic and Molecular Physics and Optics Spectral line 0104 chemical sciences Electronic Optical and Magnetic Materials Nanoclusters Inorganic Chemistry Molecule Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Luminescence Bimetallic strip Spectroscopy |
| Zdroj: | Optical Materials. 86:291-297 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2018.10.025 |
| Popis: | Gold nanoclusters (NCs) have received wide attention in basic physical chemistry as well as biomedical applications due to unique electronic structure and luminescence properties. However, expensive cost of gold and weak luminescence prevent their wide applications in biomedicine. Herein, bimetallic fluorescent CuAu NCs were successfully prepared, and the structural, optical properties as well as bioimaging of the CuAu NCs were investigated in detail. The CuAu NCs show the luminescence enhancement compared with Au NCs. Meanwhile, the excellent stability and photostability are also revealed by photoluminescence spectra. The structural investigations reveal that the CuAu NCs are complex clusters with molecule weight of 4.8–5.8 kDa. In addition, the CuAu NCs possess the long fluorescence lifetime of 6.55 μs, which could be associated with metal-centered triplet emission within the clusters. It is also demonstrated that the ultrastable CuAu NCs exhibit low cytotoxicity and can be used for cellular imaging. |
| Databáze: | OpenAIRE |
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