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Optical Label-Free Sensors

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (30 November 2020) | Viewed by 4576

Special Issue Editors


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Guest Editor
1) Applied Physics and Materials Engineering, ETSI Industriales, Universidad Politécnica de Madrid., Universidad Politécnica de Madrid. José Gutiérrez Abascal 2, 28006 Madrid, Spain
2) Optics, Photonics and Biophotonics group. Center for Biomedical Technology. Campus de Montegancedo, Universidad Politécncia de Madrid. 28823 Pozuelo de Alarcón, Madrid, Spain
Interests: photonics; micro-nano fabrication; optical sensors

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Guest Editor
1. Department of Applied Physics and Materials Engineering, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, 28006 Madrid, Spain
2. Optics, Photonics and Biophotonics Group in the Center for Biomedical Technology (CTB), Universidad Politécnica de Madrid, 28223 Madrid, Spain
3. Group of Organ and Tissue On-a-Chip and In-Vitro Detection, Health Research Institute of the Hospital Clínico San Carlos, 28040 Madrid, Spain
Interests: micro-nanotechnology; optical biosensors; point-of-care devices; biofunctionalization; sensing surfaces; organs-on-chips
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Special Issue Information

Dear Colleagues,

Optical Label-Free Sensors is a research field which has focused growing interest since first devices, such as Surface Plasmon Resonance (SPR) based biosensors, emerged as an alternative for biodetection. Since then, biofunctionalization techniques, micro and nano fabrication processes, microfluidic devices and have contributed to develop highly integrable biosensors, with really low values of limit of detection (both for refractive index sensing and biodetection), hardly reachable with other sensing techniques, and also requiring really small values of sample for all the detection process.

In this special issue we will focus on recent advances on the optical biosensing field: New or improved platforms for optical sensing, optimized optical transducers, integrated devices, multiplexed detection units, biofunctionalization protocols for transducers and characterization of the performance of sensors are some examples of the sub topics covered in this special issue, no excluding other any other topic related

Dr. Rafael Casquel del Campo
Dr. María Fé Laguna Heras.
Guest Editors

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Keywords

  • Biosensors
  • Label-free refractive index sensing
  • biofucntionalization

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Published Papers (1 paper)

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Research

13 pages, 2139 KiB  
Article
Photothermal Effect in Plasmonic Nanotip for LSPR Sensing
by Muhammad Shemyal Nisar, Siyu Kang and Xiangwei Zhao
Sensors 2020, 20(3), 671; https://doi.org/10.3390/s20030671 - 25 Jan 2020
Cited by 11 | Viewed by 4173
Abstract
The influence of heat generation on the conventional process of LSPR based sensing has not been explored thus far. Therefore, a need exists to draw attention toward the heat generation issue during LSPR sensing as it may affect the refractive index of the [...] Read more.
The influence of heat generation on the conventional process of LSPR based sensing has not been explored thus far. Therefore, a need exists to draw attention toward the heat generation issue during LSPR sensing as it may affect the refractive index of the analyte, leading to incorrect sensory conclusions. This manuscript addresses the connection between the photo-thermal effect and LSPR. We numerically analyzed the heat performance of a gold cladded nanotip. The numerical results predict a change in the micro-scale temperature in the microenvironment near the nanotip. These numerical results predict a temperature increase of more than 20 K near the apex of the nanotip, which depends on numerous factors including the input optical power and the diameter of the fiber. We analytically show that this change in the temperature influences a change in the refractive index of the microenvironment in the vicinity of the nanotip. In accordance with our numerical and analytical findings, we experimentally show an LSPR shift induced by a change in the input power of the source. We believe that our work will bring the importance of temperature dependence in nanotip based LSPR sensing to the fore. Full article
(This article belongs to the Special Issue Optical Label-Free Sensors)
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