Yi Duo, Wang Cong, Gao Lingfeng, Chen Yuzhi, Liu Fei, Geng Youfu, Zhang Han, Li Xuejin
Opt Lett. 2022 Jan 1;47(1):138-141. doi: 10.1364/OL.446536.
A TiCN MXene enabled ultra-sensitive optical fiber sensor is proposed, and a salinity measurement is conducted to evaluate its sensing performance in a low-concentration target molecule detection environment. Owing to the abundance of hydrophilic functional groups (-O, -F, and -OH), large specific surface, and broad-spectrum absorption characteristics of the MXene layers, the sensing performance of the MXene-incorporated sensor is greatly improved and an ultra-high salinity sensitivity of -5.34 nm/‰ is achieved (equivalent to a refractive index sensitivity of -33429 nm/RIU). Such an excellent sensing performance is 137.33% higher than that of the bare fiber sensor and is significantly enhanced over previously reported fiber sensors. Furthermore, the sensing performance of the sensor is improved without damaging the fiber structure, which is a huge advantage when compared with the traditional fiber post-processing techniques. Finally, because the refractive index is commonly used to characterize the detection ability of biosensors, our contribution suggests the integration of MXene as a potential approach to develop high-performance optical fiber biosensors.
提出了一种基于TiCN MXene的超灵敏光纤传感器，并进行了盐度测量以评估其在低浓度目标分子检测环境中的传感性能。由于MXene层具有丰富的亲水性官能团（-O、-F和-OH）、大比表面积和广谱吸收特性，掺入MXene的传感器的传感性能得到了极大提高，实现了-5.34 nm/‰的超高盐度灵敏度（相当于-33429 nm/RIU的折射率灵敏度）。这种优异的传感性能比裸光纤传感器高出137.33%，并且比先前报道的光纤传感器有显著提高。此外，在不破坏光纤结构的情况下提高了传感器的传感性能，与传统的光纤后处理技术相比，这是一个巨大的优势。最后，由于折射率通常用于表征生物传感器的检测能力，我们的研究表明，整合MXene是开发高性能光纤生物传感器的一种潜在方法。
