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<p>This study investigates the surface plasmon resonance (SPR) sensor using a heterostructure (BP-HfSe<sub>2</sub>-WS<sub>2</sub>) structure for the detection of organic compounds. The sensor’s performance parameters are analyzed analytically using MATLAB software. The effect of heterostructure layers with copper (Cu) layers has been studied. The sensitivities are found to be 166.15°/RIU, 187.48°/RIU, 204.62°/RIU, and 227.14°/RIU with the remarkable figure of merit (FoM) for the detection of pentane, n-Hexane, n-Heptane, and n-Octane. The organic compound lies between the refractive index (RI) of 1.33–1.39 (long-range RI). When compounds like pentane, n-hexane, n-heptane, and n-octane adhere to the sensor’s functionalized surface, this interaction improves detection by fostering a stronger and more detectable SPR signal. This method of SPR detection can be helpful in areas such as environmental monitoring, where it may be necessary to identify volatile organic compounds (VOCs), such as alkanes, in water at low concentrations.</p>

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Theoretical Investigation of Sensitivity Enhanced Surface Plasmon Resonance Sensor Using BP-HfSe2-WS2 Heterostructure

  • 期刊论文

  • 发表日期：

    2025年3月22日

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  • K. Srinivasan,
  • M. Ramkumar Raja,
  • A. M. Balamurugan,
  • Shivam Singh

摘要

This study investigates the surface plasmon resonance (SPR) sensor using a heterostructure (BP-HfSe2-WS2) structure for the detection of organic compounds. The sensor’s performance parameters are analyzed analytically using MATLAB software. The effect of heterostructure layers with copper (Cu) layers has been studied. The sensitivities are found to be 166.15°/RIU, 187.48°/RIU, 204.62°/RIU, and 227.14°/RIU with the remarkable figure of merit (FoM) for the detection of pentane, n-Hexane, n-Heptane, and n-Octane. The organic compound lies between the refractive index (RI) of 1.33–1.39 (long-range RI). When compounds like pentane, n-hexane, n-heptane, and n-octane adhere to the sensor’s functionalized surface, this interaction improves detection by fostering a stronger and more detectable SPR signal. This method of SPR detection can be helpful in areas such as environmental monitoring, where it may be necessary to identify volatile organic compounds (VOCs), such as alkanes, in water at low concentrations.