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<p>A sensitive plasmonic optical fiber sensor is demonstrated for phosphoric acid detection in water found in drinking water made from industrial waste. To attain a low cost configuration, D-shaped plastic optical fibers coated with multilayer sensing layers. Surface plasmon resonance (SPR) appears in a multilayer layer of graphene oxide (Go), which is functionalized with a specific acceptor on top of the silver (Ag) layer. The coating is utilized to enhance the selectivity and performance of the sensor. The sensor is investigated against phosphoric acid with different concentrations (0% M and 20% M). The sensor shows a shift in refractive index due to receptor binding. The sensor was found to be able to detect the acid with concentrations between. The sensor exhibited a sensitivity of 6.8399&#xa0;nm/C% at normal temperature. The developed photochemical sensor offers a compelling solution for the rapid, on-site, and reasonably priced identification of low acid concentrations in drinking water that harm human health. Remote control is also possible with the usage of optical fibers. Based on author’s knowledge, no reported work has been done on the integration of D-shaped fiber layered with a mixture of Go and Ag nanoparticles using surface plasmon resonance.</p>

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Water quality monitoring employing optical fiber-based SPR sensor

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Nahla A. Al Jbar Hussain,
  • Bushra R. Mahdi,
  • Abeer H. Khalid,
  • Husam Abduldaem Mohammed

摘要

A sensitive plasmonic optical fiber sensor is demonstrated for phosphoric acid detection in water found in drinking water made from industrial waste. To attain a low cost configuration, D-shaped plastic optical fibers coated with multilayer sensing layers. Surface plasmon resonance (SPR) appears in a multilayer layer of graphene oxide (Go), which is functionalized with a specific acceptor on top of the silver (Ag) layer. The coating is utilized to enhance the selectivity and performance of the sensor. The sensor is investigated against phosphoric acid with different concentrations (0% M and 20% M). The sensor shows a shift in refractive index due to receptor binding. The sensor was found to be able to detect the acid with concentrations between. The sensor exhibited a sensitivity of 6.8399 nm/C% at normal temperature. The developed photochemical sensor offers a compelling solution for the rapid, on-site, and reasonably priced identification of low acid concentrations in drinking water that harm human health. Remote control is also possible with the usage of optical fibers. Based on author’s knowledge, no reported work has been done on the integration of D-shaped fiber layered with a mixture of Go and Ag nanoparticles using surface plasmon resonance.