Plasmonic Nanohole Arrays on Top of Porous Silicon Sensors: A Win-Win Situation.

ABSTRACT: Label-free optical sensors are attractive candidates, for example, for detecting toxic substances and monitoring biomolecular interactions. Their performance can be pushed by the design of the sensor through clever material choices and integration of components. In this work, two porous materials, namely, porous silicon and plasmonic nanohole arrays, are combined in order to obtain increased sensitivity and dual-mode sensing capabilities. For this purpose, porous silicon monolayers are prepared by electrochemical etching and plasmonic nanohole arrays are obtained using a bottom-up strategy. Hybrid sensors of these two materials are realized by transferring the plasmonic nanohole array on top of the porous silicon. Reflectance spectra of the hybrid sensors are characterized by a fringe patt

SUBMITTER: Balderas-Valadez RF 

PROVIDER: S-EPMC10015452 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature