LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face
We report on a new localized surface plasmon resonance (LSPR)-based optical fiber (OF) architecture with a potential in sensor applications. The LSPR-OF system is fabricated by immobilizing gold nanoparticles (GNPs) in a hydrogel droplet polymerized on the fiber end face. This design has several adv...
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doaj-26702b50fb5540419ff2243b1194e3c82020-11-24T22:04:12ZengMDPI AGSensors1424-82202017-11-011712272310.3390/s17122723s17122723LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End FaceHarald Ian Muri0Dag Roar Hjelme1Department of Electronic Systems, Norwegian University of Science and Technology, Gunnerus gate 1, 7012 Trondheim, NorwayDepartment of Electronic Systems, Norwegian University of Science and Technology, Gunnerus gate 1, 7012 Trondheim, NorwayWe report on a new localized surface plasmon resonance (LSPR)-based optical fiber (OF) architecture with a potential in sensor applications. The LSPR-OF system is fabricated by immobilizing gold nanoparticles (GNPs) in a hydrogel droplet polymerized on the fiber end face. This design has several advantages over earlier designs. It dramatically increase the number nanoparticles (NP) available for sensing, it offers precise control over the NP density, and the NPs are positioned in a true 3D aqueous environment. The OF-hydrogel design is also compatible with low-cost manufacturing. The LSPR-OF platform can measure volumetric changes in a stimuli-responsive hydrogel or measure binding to receptors on the NP surface. It can also be used as a two-parameter sensor by utilizing both effects. We present results from proof-of-concept experiments exploring the properties of LSPR and interparticle distances of the GNP-hydrogel OF design by characterizing the distribution of distances between NPs in the hydrogel, the refractive index of the hydrogel and the LSPR attributes of peak position, amplitude and linewidth for hydrogel deswelling controlled with pH solutions.https://www.mdpi.com/1424-8220/17/12/2723reflection-based FO systemssmart hydrogelLSPR couplingnanoplasmonicspoint dipole modelMie scatteringproof-of-conceptinterparticle distance distributionpH sensor |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Harald Ian Muri Dag Roar Hjelme |
spellingShingle |
Harald Ian Muri Dag Roar Hjelme LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face Sensors reflection-based FO systems smart hydrogel LSPR coupling nanoplasmonics point dipole model Mie scattering proof-of-concept interparticle distance distribution pH sensor |
author_facet |
Harald Ian Muri Dag Roar Hjelme |
author_sort |
Harald Ian Muri |
title |
LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face |
title_short |
LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face |
title_full |
LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face |
title_fullStr |
LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face |
title_full_unstemmed |
LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face |
title_sort |
lspr coupling and distribution of interparticle distances between nanoparticles in hydrogel on optical fiber end face |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2017-11-01 |
description |
We report on a new localized surface plasmon resonance (LSPR)-based optical fiber (OF) architecture with a potential in sensor applications. The LSPR-OF system is fabricated by immobilizing gold nanoparticles (GNPs) in a hydrogel droplet polymerized on the fiber end face. This design has several advantages over earlier designs. It dramatically increase the number nanoparticles (NP) available for sensing, it offers precise control over the NP density, and the NPs are positioned in a true 3D aqueous environment. The OF-hydrogel design is also compatible with low-cost manufacturing. The LSPR-OF platform can measure volumetric changes in a stimuli-responsive hydrogel or measure binding to receptors on the NP surface. It can also be used as a two-parameter sensor by utilizing both effects. We present results from proof-of-concept experiments exploring the properties of LSPR and interparticle distances of the GNP-hydrogel OF design by characterizing the distribution of distances between NPs in the hydrogel, the refractive index of the hydrogel and the LSPR attributes of peak position, amplitude and linewidth for hydrogel deswelling controlled with pH solutions. |
topic |
reflection-based FO systems smart hydrogel LSPR coupling nanoplasmonics point dipole model Mie scattering proof-of-concept interparticle distance distribution pH sensor |
url |
https://www.mdpi.com/1424-8220/17/12/2723 |
work_keys_str_mv |
AT haraldianmuri lsprcouplinganddistributionofinterparticledistancesbetweennanoparticlesinhydrogelonopticalfiberendface AT dagroarhjelme lsprcouplinganddistributionofinterparticledistancesbetweennanoparticlesinhydrogelonopticalfiberendface |
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