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Related Experiment Video

Updated: May 12, 2026

A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering
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Light-Sheet Skew Ray-Based Microbubble Chemical Sensor for Pb2+ Measurements.

Tingting Zhuang1,2, Lukui Xu1, Mamoona Khalid3

  • 1Shenzhen Key Laboratory of Ultrafast Laser Micro/Nano Manufacturing, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.

Sensors (Basel, Switzerland)
|November 9, 2024
PubMed
Summary
This summary is machine-generated.

This study presents a novel multimode fiber sensor for detecting lead in water. The sensor achieves highly sensitive lead detection, reaching a detection limit well below the safety limit for drinking water.

Keywords:
LSPRPb2+fiber optic sensorlead sensorlight sheetlocalized surface plasmon resonanceskew rays

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Area of Science:

  • Optoelectronics
  • Chemical Sensing
  • Nanotechnology

Background:

  • Lead contamination in water poses significant health risks.
  • Accurate and sensitive detection methods for lead are crucial for environmental monitoring.
  • Existing methods may lack sensitivity or specificity for trace lead detection.

Purpose of the Study:

  • To develop and demonstrate a highly sensitive multimode fiber-based sensor for detecting trace lead in contaminated water.
  • To enhance sensor performance using optical phenomena and nanomaterials.
  • To achieve a detection limit significantly lower than established safety guidelines.

Main Methods:

  • Utilizing a light sheet to excite skew rays within a multimode fiber for optimized light absorption.
  • Incorporating an inline microbubble structure to focus skew rays and intensify the evanescent field.
  • Employing gold nanoparticles functionalized with oxalic acid to amplify the evanescent field and enhance specificity for lead ions via localized surface plasmon resonance (LSPR).

Main Results:

  • The proposed sensor demonstrated significantly enhanced absorption sensitivity.
  • Achieved a low detection limit of 0.1305 ng/mL for lead ions.
  • The detection limit is substantially lower than the World Health Organization's safety limit of 10 ng/mL.

Conclusions:

  • The developed multimode fiber sensor offers a highly sensitive and specific method for detecting trace lead in water.
  • The combination of optical focusing, evanescent field enhancement, and LSPR provides a robust sensing platform.
  • This technology has potential applications in environmental monitoring and water quality assessment.