Chu, S.; Liang, Y.; Lu, M.; Yuan, H.; Han, Y.; Masson, J.-F.; Peng, W. Mode-Coupling Generation Using ITO Nanodisk Arrays with Au Substrate Enabling Narrow-Band Biosensing. Biosensors2023, 13, 649.
Chu, S.; Liang, Y.; Lu, M.; Yuan, H.; Han, Y.; Masson, J.-F.; Peng, W. Mode-Coupling Generation Using ITO Nanodisk Arrays with Au Substrate Enabling Narrow-Band Biosensing. Biosensors 2023, 13, 649.
Chu, S.; Liang, Y.; Lu, M.; Yuan, H.; Han, Y.; Masson, J.-F.; Peng, W. Mode-Coupling Generation Using ITO Nanodisk Arrays with Au Substrate Enabling Narrow-Band Biosensing. Biosensors2023, 13, 649.
Chu, S.; Liang, Y.; Lu, M.; Yuan, H.; Han, Y.; Masson, J.-F.; Peng, W. Mode-Coupling Generation Using ITO Nanodisk Arrays with Au Substrate Enabling Narrow-Band Biosensing. Biosensors 2023, 13, 649.
Abstract
Metal plasmonic nanostructures have promising applications in biosensing due to their ability to facilitate light-matter interaction. However, the damping of the metal leads to a wide full width at half maximum (FWHM) spectrum and results which restricts its sensing capabilities. In this research, we present a novel non-full-metal nanostructure, namely indium-tin oxide (ITO)-Au nanodisk arrays consisting of top ITO nanodisk arrays and a bottom gold layer, and compare the coupling mode with the full-metal nanodisk arrays. The FWHM of proposed ITO-Au nanodisk array reduces to one fifth of that all metal nanodisk arrays, which is generated mode-coupling by surface plasmon modes at metal interfaces with magnetic resonance mode. Furthermore, the thickness variation of nanodisks has no impact on the sensing performance of this ITO-based nanostructure, ensuring excellent tolerance during preparation. We fabricated both structures by using template transfer and vacuum deposition techniques and calibrated their sensing performances by detect Immunoglobulin G (IgG) protein molecules. Both theoretical and experimental results demonstrate that ITO-Au nanodisk arrays provide an effective solution for biosensing applications.
Keywords
ITO nanodisk; nanostructure; coupling mode; biosensing; narrow band
Subject
Physical Sciences, Optics and Photonics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
