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

Nanophotonics

article

Mingyang Su¹  Dianyuan Fan¹  Xueyu Chen¹  Linwei Tang¹  Bo Yang¹  Haijian Zou¹  Junmin Liu²  Ying Li¹  Shuqing Chen¹ 

[1] 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;College of New Materials and New Energies, Shenzhen Technology University

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

DOI  :  10.1515/nanoph-2020-0251

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 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】

CC BY