Fluorescent Nanoparticles from Several Commercial Beverages: Their Properties and Potential Application for Bioimaging

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• 作者：Han Liao ; Chengkun Jiang ; Wenqiang Liu ; Juan Manuel Vera ; Oscar David Seni ; Kevin Demera ; Chenxu Yu ; Mingqian Tan
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2015
• 出版时间：September 30, 2015
• 年：2015
• 卷：63
• 期：38
• 页码：8527-8533
• 全文大小：464K
• ISSN：1520-5118

文摘

The presence of nanoparticles in beverages has raised great concern in terms of potential impacts to consumer health. Herein, carbon dots in beverages kvass, pony malta, pilsner beer, Vivant Storm, and Profit were identified. They were shown to have a strong fluorescence under the excitation of ultraviolet light. The emission peaks shift to longer wavelengths accompanied by a remarkable fluorescence intensity decrease. The carbon dots are in the nanosized range and roughly spherical in appearance. Elemental analysis by X-ray photoelectron spectroscopy demonstrated the composition of Kvass carbon dots to be C 83.17%, O 13.83%, and N 3.00%. No cytotoxicity was found at concentrations up to 20 mg/mL for human tongue squamous carcinoma cells, and they can be directly applied in both carcinoma and onion epidermal cell imaging. This work represents the first report of the carbon dots present in beverages, providing valuable insights into these nanoparticles for future biological imaging.