Abstract Due to lower out-of-plane electrical conductance, black phosphorus (BP) provides a suitable host material for improving the sensitivity of biosensors. However, BP oxidizes easily, which limits practical applications. In this article, we propose a sensitivity-enhanced guided-wave surface plasmon resonance (GWSPR) biosensor based on a BP–graphene hybrid structure. This BP–graphene hybrid structure exhibits strong antioxidation properties and exceptional biomolecule-trapping capability, which improve the stability and sensitivity of GWSPR biosensors, respectively. We show that the proposed GWSPR biosensor can distinguish refractive indices in the range of 1.33–1.78 RIU (RIU is the unit of RI), and the sensitivity reaches a maximum of 148.2°/RIU when the refractive index of sensing target is 1.33 RIU. The high sensitivity and broad detection range indicate that the proposed biosensor could significantly impact fields such as biological and chemical detection.

中文翻译：

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黑磷 (BP)-石墨烯导波表面等离子体共振 (GWSPR) 生物传感器

摘要 由于较低的面外电导率，黑磷（BP）为提高生物传感器的灵敏度提供了合适的主体材料。然而，BP容易氧化，限制了实际应用。在本文中，我们提出了一种基于 BP-石墨烯混合结构的灵敏度增强型导波表面等离子体共振 (GWSPR) 生物传感器。这种 BP-石墨烯混合结构表现出强大的抗氧化性能和卓越的生物分子捕获能力，分别提高了 GWSPR 生物传感器的稳定性和灵敏度。我们表明所提出的GWSPR生物传感器可以区分1.33-1.78 RIU范围内的折射率（RIU是RI的单位），当传感目标的折射率为1.33 RIU时，灵敏度达到最大值148.2°/RIU。