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Open AccessReview

Advances in Plasmonic Sensing at the NIR—A Review

1
INESC TEC—Institute for Systems and Computer Engineering, Technology and Science, and Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
2
Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
3
Department of Physics, School of Science and Technology, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal
4
CINBIO, Universidade de Vigo, Campus Universitario Lagoas, Marcosende, 36310 Vigo, Spain
5
SERGAS-UVIGO, Galicia Sur Health Research Institute (IIS Galicia Sur), 36312 Vigo, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Sensors 2021, 21(6), 2111; https://doi.org/10.3390/s21062111
Received: 26 January 2021 / Revised: 4 March 2021 / Accepted: 12 March 2021 / Published: 17 March 2021
(This article belongs to the Special Issue Sensors: 20th Anniversary)
Surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) are among the most common and powerful label-free refractive index-based biosensing techniques available nowadays. Focusing on LSPR sensors, their performance is highly dependent on the size, shape, and nature of the nanomaterial employed. Indeed, the tailoring of those parameters allows the development of LSPR sensors with a tunable wavelength range between the ultra-violet (UV) and near infra-red (NIR). Furthermore, dealing with LSPR along optical fiber technology, with their low attenuation coefficients at NIR, allow for the possibility to create ultra-sensitive and long-range sensing networks to be deployed in a variety of both biological and chemical sensors. This work provides a detailed review of the key science underpinning such systems as well as recent progress in the development of several LSPR-based biosensors in the NIR wavelengths, including an overview of the LSPR phenomena along recent developments in the field of nanomaterials and nanostructure development towards NIR sensing. The review ends with a consideration of key advances in terms of nanostructure characteristics for LSPR sensing and prospects for future research and advances in this field. View Full-Text
Keywords: localized surface plasmon resonance; LSPR; SPR; near infra-red; NIR; optical fiber sensors; nanoparticles; plasmonics localized surface plasmon resonance; LSPR; SPR; near infra-red; NIR; optical fiber sensors; nanoparticles; plasmonics
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MDPI and ACS Style

S. S. dos Santos, P.; M. M. M. de Almeida, J.; Pastoriza-Santos, I.; C. C. Coelho, L. Advances in Plasmonic Sensing at the NIR—A Review. Sensors 2021, 21, 2111. https://doi.org/10.3390/s21062111

AMA Style

S. S. dos Santos P, M. M. M. de Almeida J, Pastoriza-Santos I, C. C. Coelho L. Advances in Plasmonic Sensing at the NIR—A Review. Sensors. 2021; 21(6):2111. https://doi.org/10.3390/s21062111

Chicago/Turabian Style

S. S. dos Santos, Paulo; M. M. M. de Almeida, José; Pastoriza-Santos, Isabel; C. C. Coelho, Luís. 2021. "Advances in Plasmonic Sensing at the NIR—A Review" Sensors 21, no. 6: 2111. https://doi.org/10.3390/s21062111

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