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Highly fluorescent Ti3C2 MXene quantum dots for macrophage labeling and Cu2+ ion sensing.
Nanoscale ( IF 5.8 ) Pub Date : 2019-08-01 , DOI: 10.1039/c9nr04421c Qingwen Guan 1 , Junfei Ma , Wenjing Yang , Rui Zhang , Xiaojie Zhang , Xiaoxiao Dong , Yuting Fan , Lulu Cai , Yi Cao , Yilin Zhang , Neng Li , Quan Xu
Nanoscale ( IF 5.8 ) Pub Date : 2019-08-01 , DOI: 10.1039/c9nr04421c Qingwen Guan 1 , Junfei Ma , Wenjing Yang , Rui Zhang , Xiaojie Zhang , Xiaoxiao Dong , Yuting Fan , Lulu Cai , Yi Cao , Yilin Zhang , Neng Li , Quan Xu
Affiliation
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Quantum dots, derived from two-dimensional (2D) materials, have shown promise in bioimaging, sensing and photothermal applications, and in white light emitting devices (WLEDs). Herein, nitrogen and phosphorus functionalized Ti3C2 MXene based quantum dots (N,P-MQDs) were successfully prepared through a top-bottom hydrothermal method. This type of photoluminescent quantum dots has realized green fluorescence for the first time at around 560 nm with a photoluminescence quantum yield (PLQY) of 20.1%, the highest ever reported; meanwhile, it also exhibits excellent photostability and pH resistance capacities. Comprehensive characterization and well-resolved density functional theory (DFT) calculation were implemented to determine the mechanism of fluorescence shift and enhancement. Furthermore, the N,P-MQDs have been proved to efficiently act as fluorescent probes for macrophage labeling. In addition, the high sensitivity of the N,P-MQDs toward Cu2+ ions made them a low cost, sensitive, environment-friendly, and label-free fluorescence platform for Cu2+ detection. The outstanding performance of Ti3C2 MXene based quantum dots has demonstrated their great potential to be used as promising fluorescent probes in the fields of biological imaging, optical sensing, photoelectric conversion, etc.
中文翻译：
用于巨噬细胞标记和Cu2 +离子感测的高荧光Ti3C2 MXene量子点。
从二维（2D）材料派生的量子点已在生物成像，传感和光热应用以及白光发射器件（WLED）中显示出了希望。在本文中，通过顶部-底部水热法成功地制备了氮和磷官能化的Ti3C2 MXene基量子点（N，P-MQDs）。这种类型的光致发光量子点首次在560 nm左右实现绿色荧光，光致发光量子产率（PLQY）为20.1％，是有史以来最高的。同时，它还表现出优异的光稳定性和耐pH值能力。进行了全面的表征和解析度高的密度泛函理论（DFT）计算，以确定荧光位移和增强的机制。此外，N 已证明P-MQD可有效用作巨噬细胞标记的荧光探针。此外，N，P-MQD对Cu2 +离子的高灵敏度使其成为用于Cu2 +检测的低成本，灵敏，环境友好和无标记的荧光平台。基于Ti3C2 MXene的量子点的出色性能证明了其在生物成像，光学传感，光电转换等领域中用作有前途的荧光探针的巨大潜力。
更新日期：2019-07-08
中文翻译：
用于巨噬细胞标记和Cu2 +离子感测的高荧光Ti3C2 MXene量子点。
从二维（2D）材料派生的量子点已在生物成像，传感和光热应用以及白光发射器件（WLED）中显示出了希望。在本文中，通过顶部-底部水热法成功地制备了氮和磷官能化的Ti3C2 MXene基量子点（N，P-MQDs）。这种类型的光致发光量子点首次在560 nm左右实现绿色荧光，光致发光量子产率（PLQY）为20.1％，是有史以来最高的。同时，它还表现出优异的光稳定性和耐pH值能力。进行了全面的表征和解析度高的密度泛函理论（DFT）计算，以确定荧光位移和增强的机制。此外，N 已证明P-MQD可有效用作巨噬细胞标记的荧光探针。此外，N，P-MQD对Cu2 +离子的高灵敏度使其成为用于Cu2 +检测的低成本，灵敏，环境友好和无标记的荧光平台。基于Ti3C2 MXene的量子点的出色性能证明了其在生物成像，光学传感，光电转换等领域中用作有前途的荧光探针的巨大潜力。
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