Fluorinated Boron Nitride Quantum Dots: A New 0D Material for Energy Conversion and Detection of Cellular Metabolism
Fluorinated Boron Nitride Quantum Dots: A New 0D Material for Energy Conversion and Detection of Cellular Metabolism
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DOI：
10.1002/ppsc.201800346
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发表时间：
2018-12
影响因子：
2.7
通讯作者：
Sruthi Radhakrishnan;J. Park;R. Neupane;Carlos A. los Reyes;P. M. Sudeep;M. Paulose;A. Martí;C. Tiwary;V. Khabashesku;O. Varghese;B. Kaipparettu;P. Ajayan
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文献类型：
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作者：
Sruthi Radhakrishnan;J. Park;R. Neupane;Carlos A. los Reyes;P. M. Sudeep;M. Paulose;A. Martí;C. Tiwary;V. Khabashesku;O. Varghese;B. Kaipparettu;P. Ajayan
量子点具有广泛的光学、催化和电化学性质，在催化、成像、显示和光电子学方面具有新的应用。在此，讨论了氟化氮化硼（FBN）量子点中未预料到的宽光谱光吸收和高荧光量子产率。具有宽带隙半导体的FBN量子点的异质结构，二氧化钛纳米管阵列，表现出高的光催化活性，如由从太阳光谱的紫外线延伸到绿色区域的高外部量子效率（在400 nm处为约24%）所证明的。光电化学析氢实验证实了高活性。此外，证明了与正常细胞相比，可以利用高荧光量子产率来检测癌细胞中的糖酵解活性。这一发现可能会改变使用量子点进行分子检测的模式。0 D结构和通过掺杂引入的差距态被认为是氮化硼这些前所未有的特性的原因。
Quantum dots encompass a broad spectrum of optical, catalytic, and electrochemical properties bringing in novel applications in catalysis, imaging, displays, and optoelectronics. Herein, the unanticipated broad‐spectrum light absorption and high fluorescence quantum yield in fluorinated boron nitride (FBN) quantum dots are discussed. A heterostructure of FBN quantum dots with a wide‐bandgap semiconductor, titania nanotube arrays, exhibits high photocatalytic activity as evidenced by high external quantum efficiency extending from ultraviolet to green region of the solar spectrum (≈24% at 400 nm). The high activity is confirmed using photoelectrochemical hydrogen evolution experiments. Further, it is demonstrated that high fluorescence quantum yield could be tapped for the detection of glycolytic activity in cancer cells compared to normal cells. This finding could shift the paradigm of molecular detection using quantum dots. The 0D structure and the gap states introduced through fluorination are believed to be responsible for these unprecedented characteristics of boron nitride.