Abstract

A Ti₃CN 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.

© 2021 Optica Publishing Group

Ultra-sensitive all-optical phase modulation based on a fiber optic interferometer combined with Ti₃C₂T_x MXene-incorporated PDMS

Duo Yi, Zhewen Huang, Wenqiang Fu, Youfu Geng, Fei Liu, and Xuejin Li
Opt. Lett. 48(17) 4456-4459 (2023)

High-sensitivity special open-cavity Mach–Zehnder structure for salinity measurement based on etched double-side hole fiber

Ziting Lin, Riqing Lv, Yong Zhao, Hongkun Zheng, and Xixin Wang
Opt. Lett. 46(11) 2714-2717 (2021)

Highly sensitive liquid refractometric sensing based on a square coreless fiber functionalized with few-layer Ti₃C₂T_x Mxene

Qianying Feng, Jixuan Wu, Hua Bai, Binbin Song, Cheng Zhang, Wei Lin, Haifeng Liu, and Shaoxiang Duan
Opt. Mater. Express 13(3) 636-645 (2023)

SPR sensor based on exposed core micro-structured optical fiber for salinity detection with temperature self-compensation

Xianchao Yang, Zhan Wang, Yuhuai Liu, and Jianquan Yao
Opt. Mater. Express 11(8) 2468-2477 (2021)

Temperature-compensated distributed refractive index sensor based on an etched multi-core fiber in optical frequency domain reflectometry

Zongda Zhu, Dexin Ba, Lu Liu, Liqiang Qiu, and Yongkang Dong
Opt. Lett. 46(17) 4308-4311 (2021)