Next Article in Journal
A Robotic Context Query-Processing Framework Based on Spatio-Temporal Context Ontology
Next Article in Special Issue
Selective Uropathogenic E. coli Detection Using Crossed Surface-Relief Gratings
Previous Article in Journal
Enhanced Gas-Sensing Performance of GO/TiO2 Composite by Photocatalysis
Previous Article in Special Issue
Indirect Microcontact Printing to Create Functional Patterns of Physisorbed Antibodies
Article Menu
Issue 10 (October) cover image

Export Article

Open AccessFeature PaperArticle

Design of an Aluminum/Polymer Plasmonic 2D Crystal for Label-Free Optical Biosensing

1
Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
2
Department of Photonics and Bioengineering (TFB), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(10), 3335; https://doi.org/10.3390/s18103335
Received: 14 September 2018 / Revised: 2 October 2018 / Accepted: 3 October 2018 / Published: 5 October 2018
(This article belongs to the Special Issue Label-free Optical Nanobiosensors)
  |  
PDF [4110 KB, uploaded 10 October 2018]
  |  

Abstract

A design study of a nanostructured two-dimensional plasmonic crystal based on aluminum and polymeric material for label-free optical biosensing is presented. The structure is formed of Al nanohole and nanodisk array layers physically separated by a polymeric film. The photonic configuration was analyzed through finite-difference time-domain (FDTD) simulations. The calculated spectral reflectance of the device exhibits a surface plasmon polariton (SPP) resonance feature sensitive to the presence of a modeled biolayer adhered onto the metal surfaces. Simulations also reveal that the Al disks suppress an undesired SPP resonance, improving the device performance in terms of resolution as compared to that of a similar configuration without Al disks. On the basis of manufacturability issues, nanohole diameter and depth were considered as design parameters, and a multi-objective optimization process was employed to determine the optimum dimensional values from both performance and fabrication points of view. The effect of Al oxidation, which is expected to occur in an actual device, was also studied. View Full-Text
Keywords: label-free optical biosensor; plasmon resonance biosensor; nanostructured surface; aluminum; design optimization; photonic modeling label-free optical biosensor; plasmon resonance biosensor; nanostructured surface; aluminum; design optimization; photonic modeling
Figures

Figure 1

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 (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Tramarin, L.; Angulo Barrios, C. Design of an Aluminum/Polymer Plasmonic 2D Crystal for Label-Free Optical Biosensing. Sensors 2018, 18, 3335.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top