Synthesis of Strongly Fluorescent Molybdenum Disulfide Nanosheets for Cell-Targeted Labeling

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• 作者：Nan Wang ; Fang Wei ; Yuhang Qi ; Hongxiang Li ; Xin Lu ; Guoqiang Zhao ; Qun Xu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：November 26, 2014
• 年：2014
• 卷：6
• 期：22
• 页码：19888-19894
• 全文大小：429K
• ISSN：1944-8252

文摘

MoS₂ nanosheets with polydispersity of the lateral dimensions from natural mineral molybdenite have been prepared in the emulsions microenvironment built by the water/surfactant/CO₂ system. The size, thickness, and atomic structure are characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), and laser-scattering particle size analysis. Meanwhile, by the analysis of photoluminescence spectroscopy and microscope, the MoS₂ nanosheets with smaller lateral dimensions exhibit extraordinary photoluminescence properties different from those with relatively larger lateral dimensions. The discovery of the excitation dependent photoluminescence for MoS₂ nanosheets makes them potentially of interests for the applications in optoelectronics and biology. Moreover, we demonstrate that the fabricated MoS₂ nanosheets can be a nontoxic fluorescent label for cell-targeted labeling application.

Keywords:

photoluminescence; cell labeling; molybdenum disulfide; nanosheets; lateral dimensions control