Abstract In this paper, two exclusive surface plasmon resonance (SPR) biosensors are proposed numerically utilizing the newly emerged transition metal dichalcogenides (e.g. PtSe2) composed with 2D materials (e.g. Graphene, MoS2 and WS2) onto the traditional SPR biosensors. The performance of the sensors is investigated using the technique of attenuated total reflection (ATR) in terms of sensitivity, figure of merit (FOM) and quality factor (QF). Among those sensors, it has been noticed that the Ag/PtSe2/WS2 and Au/PtSe2/WS2 structures, respectively, show very high sensitivity of 194 deg/RIU and 187 deg/RIU which are 1.67 and 1.37 times higher than that of the conventional silver (Ag) and gold (Au) based sensors, respectively, with comparable FOM and QF. The thickness of Ag/Au is considered 50 nm and the number of layers of WS2 is adjusted to 4 and 2 for Ag and Au based sensors, respectively. In both cases, an optimized thickness of 2 nm is used for PtSe2. Such impressive performances of the proposed biosensors will pave a way for their use in future medical diagnostics and biomedical detection applications.

中文翻译：

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采用 PtSe2 和 2D 材料异质结构的 SPR 生物传感器的灵敏度增强

摘要 在本文中，在传统的SPR 生物传感器上，利用由二维材料（例如石墨烯、MoS2 和WS2）组成的新出现的过渡金属二硫属化物（例如PtSe2），在数值上提出了两种独特的表面等离子体共振（SPR）生物传感器。使用衰减全反射 (ATR) 技术在灵敏度、品质因数 (FOM) 和品质因数 (QF) 方面研究传感器的性能。在这些传感器中，人们注意到 Ag/PtSe2/WS2 和 Au/PtSe2/WS2 结构分别显示出非常高的灵敏度，分别为 194 deg/RIU 和 187 deg/RIU，分别是后者的 1.67 和 1.37 倍。分别具有可比 FOM 和 QF 的传统银 (Ag) 和金 (Au) 基传感器。Ag/Au 的厚度被认为是 50 nm，对于基于 Ag 和 Au 的传感器，WS2 的层数分别调整为 4 和 2。在这两种情况下，PtSe2 都使用了 2 nm 的优化厚度。所提出的生物传感器的这种令人印象深刻的性能将为它们在未来的医学诊断和生物医学检测应用中的使用铺平道路。