Ultrasensitive biosensing based on plasmonic nanostructures

P. Venugopalan; N. S. Susan Mousavi; A. Dabirian; S. Kumar

doi:10.1117/12.2541278

31 December 2019 Ultrasensitive biosensing based on plasmonic nanostructures

P. Venugopalan, N. S. Susan Mousavi, A. Dabirian, S. Kumar

Proceedings Volume 11201, SPIE Micro + Nano Materials, Devices, and Applications 2019; 112011A (2019) https://doi.org/10.1117/12.2541278
Event: ANZCOP, 2019, Melbourne, Australia

Abstract

Hafnium-doped zinc oxide (HZO) has been recently demonstrated to be implemented as a transparent conducting oxide (TCO) material in photovoltaic applications but its plasmonic properties are left untouched. In this work, we systematically investigate the plasmonic properties of gold nanoparticle (Au NP) arrays on thin HZO film, for different ratios of Hf dopants to Zinc oxide (ZnO) film. A localized surface plasmon resonant (LSPR) mode and two Bragg modes (due to the coupling of plasmon modes inside the film to array periodicity) are observed in the proposed structure. Resonant excitation of these modes produces large field enhancement at the surface of the NPs as well as Au NP/HZO film interface and was observed with FDTD simulations. The optimized plasmonic structure will be fabricated on quartz crystal microbalance (QCM) using laser interference lithography, based on the plasmonic resonant position and the SERS (surface enhanced Raman scattering) intensity, and it will be integrated to a microfluidic device in the configuration of the lab-on-a-chip concept for biosensing applications.

Citation Download Citation

P. Venugopalan, N. S. Susan Mousavi, A. Dabirian, and S. Kumar "Ultrasensitive biosensing based on plasmonic nanostructures", Proc. SPIE 11201, SPIE Micro + Nano Materials, Devices, and Applications 2019, 112011A (31 December 2019); https://doi.org/10.1117/12.2541278

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available