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Photothermal Effect in Plasmonic Nanotip for LSPR Sensing

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 conclu...

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Detalles Bibliográficos
Autores principales: Nisar, Muhammad Shemyal, Kang, Siyu, Zhao, Xiangwei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7039235/
https://www.ncbi.nlm.nih.gov/pubmed/31991744
http://dx.doi.org/10.3390/s20030671
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author Nisar, Muhammad Shemyal
Kang, Siyu
Zhao, Xiangwei
author_facet Nisar, Muhammad Shemyal
Kang, Siyu
Zhao, Xiangwei
author_sort Nisar, Muhammad Shemyal
collection PubMed
description 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.
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spelling pubmed-70392352020-03-09 Photothermal Effect in Plasmonic Nanotip for LSPR Sensing Nisar, Muhammad Shemyal Kang, Siyu Zhao, Xiangwei Sensors (Basel) Article 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. MDPI 2020-01-25 /pmc/articles/PMC7039235/ /pubmed/31991744 http://dx.doi.org/10.3390/s20030671 Text en © 2020 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/).
spellingShingle Article
Nisar, Muhammad Shemyal
Kang, Siyu
Zhao, Xiangwei
Photothermal Effect in Plasmonic Nanotip for LSPR Sensing
title Photothermal Effect in Plasmonic Nanotip for LSPR Sensing
title_full Photothermal Effect in Plasmonic Nanotip for LSPR Sensing
title_fullStr Photothermal Effect in Plasmonic Nanotip for LSPR Sensing
title_full_unstemmed Photothermal Effect in Plasmonic Nanotip for LSPR Sensing
title_short Photothermal Effect in Plasmonic Nanotip for LSPR Sensing
title_sort photothermal effect in plasmonic nanotip for lspr sensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7039235/
https://www.ncbi.nlm.nih.gov/pubmed/31991744
http://dx.doi.org/10.3390/s20030671
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