Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy

Abstract Plasmonic gold nanoparticles are widely used in localized surface plasmon resonance (LSPR) sensing. When target molecules adsorb to the nanoparticles, they induce a shift in the LSPR scattering spectrum. In conventional LSPR sensing, this shift is monitored at the maximum of the LSPR scatte...

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Autores principales:	Kyeong Rim Ryu, Geun Wan Kim, Ji Won Ha
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c68161da6b0145dc9d1b0d27e43c97dc
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spelling	oai:doaj.org-article:c68161da6b0145dc9d1b0d27e43c97dc2021-12-02T16:04:35ZLocalized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy10.1038/s41598-021-92410-w2045-2322https://doaj.org/article/c68161da6b0145dc9d1b0d27e43c97dc2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92410-whttps://doaj.org/toc/2045-2322Abstract Plasmonic gold nanoparticles are widely used in localized surface plasmon resonance (LSPR) sensing. When target molecules adsorb to the nanoparticles, they induce a shift in the LSPR scattering spectrum. In conventional LSPR sensing, this shift is monitored at the maximum of the LSPR scattering peak. Herein, we describe the sensitivity of detecting chemisorption of 1-alkanethiols with different chain lengths (1-butanethiol and 1-haxanethiol) on single gold nanorods (AuNRs) of fixed diameter (25 nm) and three different aspect ratios under a total internal reflection scattering microscope. For single AuNRs of all sizes, the inflection point (IF) at the long-wavelength side (or low-energy side) of the LSPR scattering peak showed higher detection sensitivity than the traditionally used peak maximum. The improved sensitivity can be ascribed to the shape change of the LSPR peak when the local refractive index is increased by chemisorption. Our results demonstrate the usefulness of tracking the curvature shapes by monitoring the homogeneous LSPR IF at the red side of the scattering spectrum of single AuNRs.Kyeong Rim RyuGeun Wan KimJi Won HaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kyeong Rim Ryu Geun Wan Kim Ji Won Ha Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy
description	Abstract Plasmonic gold nanoparticles are widely used in localized surface plasmon resonance (LSPR) sensing. When target molecules adsorb to the nanoparticles, they induce a shift in the LSPR scattering spectrum. In conventional LSPR sensing, this shift is monitored at the maximum of the LSPR scattering peak. Herein, we describe the sensitivity of detecting chemisorption of 1-alkanethiols with different chain lengths (1-butanethiol and 1-haxanethiol) on single gold nanorods (AuNRs) of fixed diameter (25 nm) and three different aspect ratios under a total internal reflection scattering microscope. For single AuNRs of all sizes, the inflection point (IF) at the long-wavelength side (or low-energy side) of the LSPR scattering peak showed higher detection sensitivity than the traditionally used peak maximum. The improved sensitivity can be ascribed to the shape change of the LSPR peak when the local refractive index is increased by chemisorption. Our results demonstrate the usefulness of tracking the curvature shapes by monitoring the homogeneous LSPR IF at the red side of the scattering spectrum of single AuNRs.
format	article
author	Kyeong Rim Ryu Geun Wan Kim Ji Won Ha
author_facet	Kyeong Rim Ryu Geun Wan Kim Ji Won Ha
author_sort	Kyeong Rim Ryu
title	Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy
title_short	Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy
title_full	Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy
title_fullStr	Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy
title_full_unstemmed	Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy
title_sort	localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c68161da6b0145dc9d1b0d27e43c97dc
work_keys_str_mv	AT kyeongrimryu localizedsurfaceplasmonresonanceinflectionpointsforimproveddetectionofchemisorptionof1alkanethiolsundertotalinternalreflectionscatteringmicroscopy AT geunwankim localizedsurfaceplasmonresonanceinflectionpointsforimproveddetectionofchemisorptionof1alkanethiolsundertotalinternalreflectionscatteringmicroscopy AT jiwonha localizedsurfaceplasmonresonanceinflectionpointsforimproveddetectionofchemisorptionof1alkanethiolsundertotalinternalreflectionscatteringmicroscopy
_version_	1718385232027058176

Localized surface plasmon resonance inflection points for improved detection of chemisorption of 1-alkanethiols under total internal reflection scattering microscopy

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