Black phosphorus (BP)–graphene guided-wave surface plasmon resonance (GWSPR) biosensor

Nanophotonics

Liu Junmin¹  Zou Haijian²  Tang Linwei²  Chen Xueyu²  Su Mingyang²  Yang Bo²  Fan Dianyuan²  Li Ying²  Chen Shuqing² 

[1] College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 507738, China;International Collaborative Laboratory of 2D Materials for Optoelectronics Science & Technology of Ministry of Education, Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China;

关键词: biosensor;    black phosphorus;    graphene;    hybrid structure;    surface plasmon resonance;   

DOI  :  10.1515/nanoph-2020-0251

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown