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Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions

Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions


Title: Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions
Author: Carney, Daniel
Svavarsson, Halldor   orcid.org/0000-0002-1729-4098
Hemmati, Hafez
Fannin, Alexander
Yoon, Jae
Magnusson, Robert
Date: 2019-02-21
Language: English
Scope: 897
University/Institute: Háskólinn í Reykjavík
Reykjavik University
School: Tæknisvið (HR)
School of Technology (RU)
Department: Verkfræðideild (HR)
Department of Engineering (RU)
Series: Sensors;19(4)
ISSN: 1424-8220
DOI: 10.3390/s19040897
Subject: Electrical and Electronic Engineering; Analytical Chemistry; Atomic and Molecular Physics, and Optics; Biochemistry; Refractometer; Plasmonic sensors; Biosensors; Nanocups; Periodic structures; Surface plasmon resonance; Gas detectors; Sensors; Rafmagnsverkfræði; Rafeindaverkfræði; Efnafræði; Atómfræði; Sameindafræði; Lífefnafræði; Rafgas; Litrófsgreining; Nanótækni
URI: https://hdl.handle.net/20.500.11815/2081

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Citation:

Carney, D. J., Svavarsson, H. G., Hemmati, H., Fannin, A., Yoon, J. W., & Magnusson, R. (2019). Refractometric Sensing with Periodic Nano-Indented Arrays: Effect of Structural Dimensions. Sensors, 19(4), 897. https://doi.org/10.3390/s19040897

Abstract:

Fabrication and sensor application of a simple plasmonic structure is described in this paper. The sensor element consists of nano-patterned gold film brought about from two-dimensional periodic photoresist templates created by holographic laser interference lithography. Reflectance spectroscopy revealed that the sensor exhibits significant refractive index sensitivity. A linear relationship between shifts in plasmonic resonances and changes in the refractive index were demonstrated. The sensor has a bulk sensitivity (SB) of 880 nm/refractive index unit and work under normal incidence conditions. This sensitivity exceeded that of many common types of plasmonic sensors with more intricate structures. A modeled spectral response was used to study the effect of its geometrical dimensions on plasmonic behavior. A qualitative agreement between the experimental spectra and modeled ones was obtained.

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©2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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