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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Published on: January 7, 2019

Post-functionalized MOF-based optical fiber SPR sensor for high-sensitivity and broad-range Hg²⁺ detection.

Yuheng Zuo, Lingling Li, Jian Cheng

|July 2, 2026

Summary

This summary is machine-generated.

A novel metal-organic framework (MOF)-functionalized fiber sensor detects mercury ions (Hg²⁺) with high sensitivity and specificity. This advanced sensor offers a wide detection range for practical aqueous mercury sensing applications.

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Area of Science:

Materials Science
Analytical Chemistry
Environmental Science

Background:

Mercury ions (Hg²⁺) pose significant environmental and health risks.
Accurate and sensitive detection methods for Hg²⁺ are crucial for monitoring and remediation.
Existing detection methods often face challenges with sensitivity, selectivity, or real-time monitoring.

Purpose of the Study:

To develop a highly sensitive and specific fiber optic sensor for detecting mercury ions (Hg²⁺).
To leverage metal-organic frameworks (MOFs) and surface plasmon resonance (SPR) for enhanced sensing performance.
To enable real-time, wide-range detection of Hg²⁺ in aqueous environments.

Main Methods:

Fabrication of an optical fiber SPR sensor functionalized with UiO-66-NH₂ MOF.
Post-functionalization of UiO-66-NH₂ with 4-Amino-6-hydroxy-2-mercaptopyrimidine (AHMP) to introduce specific Hg²⁺ binding sites.
Characterization of the sensor's performance, including sensitivity, selectivity, detection range, and limit of detection.

Main Results:

The MOF-functionalized sensor demonstrated high sensitivity and specificity for Hg²⁺ detection.
A wide detection range from 0.1 to 400 μg/mL was achieved.
A low limit of detection (LOD) of 0.058 μg/mL for Hg²⁺ was obtained.
The sensor showed superior recognition of Hg²⁺ over other heavy metal ions.

Conclusions:

The developed MOF-functionalized fiber sensor offers a promising platform for sensitive and selective Hg²⁺ detection.
The sensor's ability for real-time monitoring and wide detection range makes it suitable for practical environmental applications.
This technology has significant potential for the monitoring of mercury contamination in aqueous samples.