ZnO and Bi-metallic (Ag–Au) Layers Based Surface Plasmon Resonance (SPR) Biosensor with BaTiO₃ and Graphene for Biosensing Applications

Abstract

In this work, a novel design of Zinc Oxide (ZnO) and bi-metallic (Ag–Au) layers based surface plasmon resonance (SPR) biosensor with barium titanate (BaTiO₃) and graphene is proposed. The proposed structure consists of SF10 glass prism, ZnO, Ag, Au, BaTiO₃, and graphene as a top layer for biomolecules adsorption. Here, the performance of this structure is studied and analysed for sensitivity along with the accuracy of detection and quality parameter for the shift in refractive index (RI) from 1.33 (sensing medium) to 1.45 and our reported results show that addition of bimetallic (Ag–Au) layers along with BaTiO₃, improve the sensitivity of the proposed structure to 14.85% for the same RI range compared to last reported MoS₂-graphene-based SPR sensor. Here at $\lambda =632.8\text{nm},$ maximum sensitivity is reported as 116.67 degree/RIU while the accuracy of detection and the quality parameter are obtained as 4.54 and 37.87 RIU⁻¹ respectively. These high-performance parameters of the design make this structure suitable for biosensing applications.

KEYWORDS:

• BaTiO₃
• Bimetallic
• Biosensor
• Sensitivity
• Surface plasmon resonance
• ZnO

ACKNOWLEDGEMENTS

The authors thank the ECE Department, Malaviya National Institute of Technology, India for all necessary support to accomplish this research work.

Additional information

Notes on contributors

N. Mudgal

N Mudgal was born in Rajasthan, India. He received the BE degree in electronics and communication engineering from University of Rajasthan, Jaipur in 2008 and MTech degree in digital communication engineering from Rajasthan Technical University, Kota. He is currently working toward the PhD degree at MNIT, Jaipur, India. His current research interest is optical sensors.

Ankur Saharia

Ankur Saharia is currently pursuing doctorate in the field of integrated photonics from Malaviya National Institute of Technology, Jaipur. He has done BE and MTech (Malaviya National Institute of Technology) in the field of electronics and communication. He has experience of teaching undergraduate students of more than 7 years. He has various publications in the field of integrated photonics. Email: [email protected]

Ankit Agarwal

Ankit Agarwal, received BE degree in electronics and communication engineering from University of Rajasthan and MTech degree in electronics and communication engineering from JIIT, Noida in 2009 and 2012, respectively. In 2013 he Joined SKITMG College, Jaipur as an assistant professor. He has published more than 23 research papers in different international conferences and journals. He is the reviewer of IEEE Electronics and Aerospace Magazine, International Journal of Wireless Information Networks, IEEE Access, IEEE Signal Processing Magazine and many more. He is also the life member of different professional societies. Email: [email protected]

G. Singh

G Singh received PhD degree in electronics and communication engineering. He is currently the professor in the Department of ECE of MNIT Jaipur. In past, He worked as visiting researcher/professor for various periods with HW University, Edinburgh, UEF Joensuu, Finland and KEIO University, Japan. He is a global orator and delivered talks at various universities in India/abroad including the Germany, UK, Japan, Ukraine, Belarus, China, Italy, Poland, France, Portugal and USA. His current researches of interest are optical switches, optical logic gates and circuits, non-linear optics, photonic crystal fibres, nano photonics, nano-structured materials. Email: [email protected]