High-Yield Exfoliation of Ultrathin Two-Dimensional Ternary Chalcogenide Nanosheets for Highly Sensitive and Selective Fluorescence DNA Sensors

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• 作者：Chaoliang Tan ; Peng Yu ; Yanling Hu ; Junze Chen ; Ying Huang ; Yongqing Cai ; Zhimin Luo ; Bing Li ; Qipeng Lu ; Lianhui Wang ; Zheng Liu ; Hua Zhang
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：August 19, 2015
• 年：2015
• 卷：137
• 期：32
• 页码：10430-10436
• 全文大小：517K
• ISSN：1520-5126

文摘

High-yield preparation of ultrathin two-dimensional (2D) nanosheets is of great importance for the further exploration of their unique properties and promising applications. Herein, for the first time, the high-yield and scalable production of ultrathin 2D ternary chalcogenide nanosheets, including Ta₂NiS₅ and Ta₂NiSe₅, in solution is achieved by exfoliating their layered microflakes. The size of resulting Ta₂NiS₅ and Ta₂NiS₅ nanosheets ranges from tens of nanometers to few micrometers. Importantly, the production yield of single-layer Ta₂NiS₅ nanosheets is very high, ca. 86%. As a proof-of-concept application, the single-layer Ta₂NiS₅ is used as a novel fluorescence sensing platform for the detection of DNA with excellent selectivity and high sensitivity (with detection limit of 50 pM). These solution-processable, high-yield, large-amount ternary chalcogenide nanosheets may also have potential applications in electrocatalysis, supercapacitors, and electronic devices.