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Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays
[Image: see text] We present a versatile approach to produce macroscopic, substrate-supported arrays of plasmonic nanoparticles with well-defined interparticle spacing and a continuous particle size gradient. The arrays thus present a “plasmonic library” of locally noncoupling plasmonic particles of...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2014
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4287417/ https://www.ncbi.nlm.nih.gov/pubmed/25137554 http://dx.doi.org/10.1021/nn503493c |
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author | Müller, Mareen B. Kuttner, Christian König, Tobias A. F. Tsukruk, Vladimir V. Förster, Stephan Karg, Matthias Fery, Andreas |
author_facet | Müller, Mareen B. Kuttner, Christian König, Tobias A. F. Tsukruk, Vladimir V. Förster, Stephan Karg, Matthias Fery, Andreas |
author_sort | Müller, Mareen B. |
collection | PubMed |
description | [Image: see text] We present a versatile approach to produce macroscopic, substrate-supported arrays of plasmonic nanoparticles with well-defined interparticle spacing and a continuous particle size gradient. The arrays thus present a “plasmonic library” of locally noncoupling plasmonic particles of different sizes, which can serve as a platform for future combinatorial screening of size effects. The structures were prepared by substrate assembly of gold-core/poly(N-isopropylacrylamide)-shell particles and subsequent post-modification. Coupling of the localized surface plasmon resonance (LSPR) could be avoided since the polymer shell separates the encapsulated gold cores. To produce a particle array with a broad range of well-defined but laterally distinguishable particle sizes, the substrate was dip-coated in a growth solution, which resulted in an overgrowth of the gold cores controlled by the local exposure time. The kinetics was quantitatively analyzed and found to be diffusion rate controlled, allowing for precise tuning of particle size by adjusting the withdrawal speed. We determined the kinetics of the overgrowth process, investigated the LSPRs along the gradient by UV–vis extinction spectroscopy, and compared the spectroscopic results to the predictions from Mie theory, indicating the absence of local interparticle coupling. We finally discuss potential applications of these substrate-supported plasmonic particle libraries and perspectives toward extending the concept from size to composition variation and screening of plasmonic coupling effects. |
format | Online Article Text |
id | pubmed-4287417 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-42874172015-01-13 Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays Müller, Mareen B. Kuttner, Christian König, Tobias A. F. Tsukruk, Vladimir V. Förster, Stephan Karg, Matthias Fery, Andreas ACS Nano [Image: see text] We present a versatile approach to produce macroscopic, substrate-supported arrays of plasmonic nanoparticles with well-defined interparticle spacing and a continuous particle size gradient. The arrays thus present a “plasmonic library” of locally noncoupling plasmonic particles of different sizes, which can serve as a platform for future combinatorial screening of size effects. The structures were prepared by substrate assembly of gold-core/poly(N-isopropylacrylamide)-shell particles and subsequent post-modification. Coupling of the localized surface plasmon resonance (LSPR) could be avoided since the polymer shell separates the encapsulated gold cores. To produce a particle array with a broad range of well-defined but laterally distinguishable particle sizes, the substrate was dip-coated in a growth solution, which resulted in an overgrowth of the gold cores controlled by the local exposure time. The kinetics was quantitatively analyzed and found to be diffusion rate controlled, allowing for precise tuning of particle size by adjusting the withdrawal speed. We determined the kinetics of the overgrowth process, investigated the LSPRs along the gradient by UV–vis extinction spectroscopy, and compared the spectroscopic results to the predictions from Mie theory, indicating the absence of local interparticle coupling. We finally discuss potential applications of these substrate-supported plasmonic particle libraries and perspectives toward extending the concept from size to composition variation and screening of plasmonic coupling effects. American Chemical Society 2014-08-19 2014-09-23 /pmc/articles/PMC4287417/ /pubmed/25137554 http://dx.doi.org/10.1021/nn503493c Text en Copyright © 2014 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Müller, Mareen B. Kuttner, Christian König, Tobias A. F. Tsukruk, Vladimir V. Förster, Stephan Karg, Matthias Fery, Andreas Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays |
title | Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays |
title_full | Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays |
title_fullStr | Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays |
title_full_unstemmed | Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays |
title_short | Plasmonic Library Based on Substrate-Supported Gradiential Plasmonic Arrays |
title_sort | plasmonic library based on substrate-supported gradiential plasmonic arrays |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4287417/ https://www.ncbi.nlm.nih.gov/pubmed/25137554 http://dx.doi.org/10.1021/nn503493c |
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