Optical Fiber Sensor for Mercury Ion Detection Based on Quantum Dots and Evanescent Wave Sensing

Ting, 刘婷 Liu; Wenqi, 王文琪 Wang; Zhiqun, 刘志群 Liu; Dingrong, 易定容 Yi

doi:10.3788/aos201838.1006008

Cited by 1 publication

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“…A glutathione-functionalized long-period fiber gratings sensor based on surface plasmon resonance for detection of As 3+ ions has a low detection limit of 0.04 ppb [19]. T. Liu et al demonstrated a mercury ion detection fiber-optic sensor [20] based on quantum dots and evanescent waves, which has an ultra-low detection limit of 1 nmol l −1 and a fast response speed. Nevertheless, the quantum dot materials are expensive and difficult to be synthesized.…”

Section: Introductionmentioning

confidence: 99%

Fiber-optic lead ion sensor based on MXene film integrated michelson interference structure

Xiong¹,

Zhuang²,

Feng³

2023

Phys. Scr.

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Ti3C2Tx (MXene), a two-dimensional material prepared by solution etching, has abundant functional groups on its surface, which makes it have a great prospect in the field of biosensing environmental detection. In this work, a new optical fiber sensor integrated with MXene is proposed and fabricated. The sensor is constituted of a three-core fiber (TCF), a single-mode fiber (SMF), and a no-core fiber (NCF) to form a Michelson interference structure. The results indicate that MXene decorated fiber-optic sensor can detect trace lead ions (Pb2+) and has a good response to the Pb2+ solutions with the concentration of 0-100 μM. At 0.001 μM (i.e., 0.286 ppb) Pb2+, the response time is about 2 minutes. In addition, the fiber-optic sensor has excellent temperature, pH, and time stability. The present work provides a new idea for the detection of Pb2+ in heavy metal pollution fields.

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Section: Introductionmentioning

confidence: 99%