Refractive Index Sensors Based on Ti3C2Tx MXene Fibers
Refractive Index Sensors Based on Ti3C2Tx MXene Fibers
复制标题
基于 Ti3C2TX MXene 光纤的折射率传感器
DOI：
10.1021/acsanm.9b01889
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发表时间：
2020-01-01
影响因子：
5.9
通讯作者：
Li, Xuejin
中科院分区：
文献类型：
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作者：
Chen, Yuzhi;Ge, Yanqi;Li, Xuejin
光纤生物传感器检测微量生化分子的灵敏度是一个非常具有挑战性的问题。二维MXene由于具有金属导电性、表面亲水、比表面积大、宽波段光吸收等特点，近年来在生物传感、气体传感和湿度传感等方面具有较强的灵敏度增强作用。本研究首次用实验证据支持二维MXene Ti3C2Tx的特性可以提高光纤生物传感器灵敏度的机理，并对两种光纤生物传感器进行了对比，比较了有无MXene修饰的光纤生物传感器的灵敏度增强情况。折射率(RI)检测可以定量反映生物传感器的检测能力。在本文中，我们使用RI检测来量化传感器的性能改进。高性能光纤表面等离子体共振传感器的灵敏度提高了30%，光纤RI传感器的灵敏度提高了8倍以上，可用于大多数微量生化分子的检测。此外，前者还可以调整其工作窗口以适应不同的检测条件，而后者可以在相同的高质量性能下在宽谱范围内工作。我们的发现可能会推动基于mxeni的光学传感技术的未来发展。
The sensitivity of fiber optic biosensors to detect trace biochemical molecules is highly challenging. Two-dimensional (2D) MXene is recently found to have strong sensitivity enhancement on biosensing, gas sensing, and humidity sensing because of its characteristics of metallic conductivity, hydrophilic surface, large specific surface, and wide band optical absorption. Here, for the first time, the experimental evidence supports the mechanism that the characteristics of 2D MXene Ti3C2Tx can enhance sensitivities of fiber optic biosensors and two kinds of fiber optic biosensors are demonstrated to compare the sensitivity enhancement between those with and without MXene decoration. Refractive index (RI) detection can be used to quantitatively reflect the detection ability of biosensors. In this paper, we use RI detection to quantify the performance improvement of our sensors. A high-performance fiber optic surface plasmon resonance sensor with a similar to 30% sensitivity boost is demonstrated, and a fiber optic RI sensor exhibits an outstanding sensitivity enhancement of more than 8 times, which can be applied to the detection of most trace biochemical molecules. Additionally, the former can also tune its operation window to adapt to different detection conditions, while the latter can work in a wide spectrum with the same high quality performance. Our findings may advance the future development of MXene-based optical sensing technology.