<p>This study presents a novel surface plasmon resonance (SPR) alcohol(ethanol) sensor utilizing an <InlineEquation ID="IEq3"> <EquationSource Format="TEX">$\varvec{MXene}\varvec{/}\varvec{SnO}_{\varvec{2}}\varvec{/}\varvec{Au}$</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mrow> <mi mathvariant="bold-italic">MXene</mi> </mrow> <mrow> <mo mathvariant="bold" stretchy="false">/</mo> </mrow> <msub> <mrow> <mi mathvariant="bold-italic">SnO</mi> </mrow> <mrow> <mn mathvariant="bold">2</mn> </mrow> </msub> <mrow> <mo mathvariant="bold" stretchy="false">/</mo> </mrow> <mrow> <mi mathvariant="bold-italic">Au</mi> </mrow> </mrow> </math></EquationSource> </InlineEquation> composite structure tailored for MSM optical fibers. A gold film is applied to the surface of the single-mode optical fiber cladding via magnetron sputtering. Subsequent layers of <InlineEquation ID="IEq4"> <EquationSource Format="TEX">$\varvec{SnO}_{\varvec{2}}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi mathvariant="bold-italic">SnO</mi> </mrow> <mrow> <mn mathvariant="bold">2</mn> </mrow> </msub> </math></EquationSource> </InlineEquation> nanofiber and MXene are constructed on this gold film using electrospinning technology, creating a multi-layered composite structure that offers a synergistic enhancement effect. Experimental findings indicate that the sensor’s sensitivity to alcohol concentration stands at 3648.47 nm/RIU. Furthermore, there is a pronounced linear correlation between the SPR resonant wavelength and the alcohol concentration, with an <InlineEquation ID="IEq5"> <EquationSource Format="TEX">$\varvec{R}^{\varvec{2}}$</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mi mathvariant="bold-italic">R</mi> </mrow> <mrow> <mn mathvariant="bold">2</mn> </mrow> </msup> </math></EquationSource> </InlineEquation> value of 0.9953. A series of five repeated tests reveals a standard deviation below 1.83%, underscoring the sensor’s remarkable stability and repeatability. This research offers a groundbreaking approach to the design of highly sensitive optical fiber SPR sensors, holding significant implications for applications in biomolecular detection, chemical sensing, and environmental monitoring.</p>

Optical Fiber Surface Plasmon Resonance Alcohol Sensor Based on MXene/$SnO_2$/Au Structure

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发表日期：

2025年8月2日

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Yu Furen,
Song Hongyu,
Gao Shuxian,
Xu Yanpei,
Wang Qi

摘要

This study presents a novel surface plasmon resonance (SPR) alcohol(ethanol) sensor utilizing an $\varvec{MXene}\varvec{/}\varvec{SnO}_{\varvec{2}}\varvec{/}\varvec{Au}$ $MXene / {SnO}_{2} / Au$ composite structure tailored for MSM optical fibers. A gold film is applied to the surface of the single-mode optical fiber cladding via magnetron sputtering. Subsequent layers of $\varvec{SnO}_{\varvec{2}}$ ${SnO}_{2}$ nanofiber and MXene are constructed on this gold film using electrospinning technology, creating a multi-layered composite structure that offers a synergistic enhancement effect. Experimental findings indicate that the sensor’s sensitivity to alcohol concentration stands at 3648.47 nm/RIU. Furthermore, there is a pronounced linear correlation between the SPR resonant wavelength and the alcohol concentration, with an $\varvec{R}^{\varvec{2}}$ $R^{2}$ value of 0.9953. A series of five repeated tests reveals a standard deviation below 1.83%, underscoring the sensor’s remarkable stability and repeatability. This research offers a groundbreaking approach to the design of highly sensitive optical fiber SPR sensors, holding significant implications for applications in biomolecular detection, chemical sensing, and environmental monitoring.

Optical Fiber Surface Plasmon Resonance Alcohol Sensor Based on MXene/\(SnO_2\)/Au Structure

摘要