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Covalently Conjugated Gold–Porphyrin Nanostructures
Gold nanoparticles show important electronic and optical properties, owing to their size, shape, and electronic structures. Indeed, gold nanoparticles containing no more than 30–40 atoms are only luminescent, while nanometer-sized gold nanoparticles only show surface plasmon resonance. Therefore, it...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7558707/ https://www.ncbi.nlm.nih.gov/pubmed/32825720 http://dx.doi.org/10.3390/nano10091644 |
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author | Spitaleri, Luca Gangemi, Chiara M. A. Purrello, Roberto Nicotra, Giuseppe Trusso Sfrazzetto, Giuseppe Casella, Girolamo Casarin, Maurizio Gulino, Antonino |
author_facet | Spitaleri, Luca Gangemi, Chiara M. A. Purrello, Roberto Nicotra, Giuseppe Trusso Sfrazzetto, Giuseppe Casella, Girolamo Casarin, Maurizio Gulino, Antonino |
author_sort | Spitaleri, Luca |
collection | PubMed |
description | Gold nanoparticles show important electronic and optical properties, owing to their size, shape, and electronic structures. Indeed, gold nanoparticles containing no more than 30–40 atoms are only luminescent, while nanometer-sized gold nanoparticles only show surface plasmon resonance. Therefore, it appears that gold nanoparticles can alternatively be luminescent or plasmonic and this represents a severe restriction for their use as optical material. The aim of our study was the fabrication of nanoscale assembly of Au nanoparticles with bi-functional porphyrin molecules that work as bridges between different gold nanoparticles. This functional architecture not only exhibits a strong surface plasmon, due to the Au nanoparticles, but also a strong luminescence signal due to porphyrin molecules, thus, behaving as an artificial organized plasmonic and fluorescent network. Mutual Au nanoparticles–porphyrin interactions tune the Au network size whose dimension can easily be read out, being the position of the surface plasmon resonance strongly indicative of this size. The present system can be used for all the applications requiring plasmonic and luminescent emitters. |
format | Online Article Text |
id | pubmed-7558707 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-75587072020-10-26 Covalently Conjugated Gold–Porphyrin Nanostructures Spitaleri, Luca Gangemi, Chiara M. A. Purrello, Roberto Nicotra, Giuseppe Trusso Sfrazzetto, Giuseppe Casella, Girolamo Casarin, Maurizio Gulino, Antonino Nanomaterials (Basel) Article Gold nanoparticles show important electronic and optical properties, owing to their size, shape, and electronic structures. Indeed, gold nanoparticles containing no more than 30–40 atoms are only luminescent, while nanometer-sized gold nanoparticles only show surface plasmon resonance. Therefore, it appears that gold nanoparticles can alternatively be luminescent or plasmonic and this represents a severe restriction for their use as optical material. The aim of our study was the fabrication of nanoscale assembly of Au nanoparticles with bi-functional porphyrin molecules that work as bridges between different gold nanoparticles. This functional architecture not only exhibits a strong surface plasmon, due to the Au nanoparticles, but also a strong luminescence signal due to porphyrin molecules, thus, behaving as an artificial organized plasmonic and fluorescent network. Mutual Au nanoparticles–porphyrin interactions tune the Au network size whose dimension can easily be read out, being the position of the surface plasmon resonance strongly indicative of this size. The present system can be used for all the applications requiring plasmonic and luminescent emitters. MDPI 2020-08-21 /pmc/articles/PMC7558707/ /pubmed/32825720 http://dx.doi.org/10.3390/nano10091644 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 Spitaleri, Luca Gangemi, Chiara M. A. Purrello, Roberto Nicotra, Giuseppe Trusso Sfrazzetto, Giuseppe Casella, Girolamo Casarin, Maurizio Gulino, Antonino Covalently Conjugated Gold–Porphyrin Nanostructures |
title | Covalently Conjugated Gold–Porphyrin Nanostructures |
title_full | Covalently Conjugated Gold–Porphyrin Nanostructures |
title_fullStr | Covalently Conjugated Gold–Porphyrin Nanostructures |
title_full_unstemmed | Covalently Conjugated Gold–Porphyrin Nanostructures |
title_short | Covalently Conjugated Gold–Porphyrin Nanostructures |
title_sort | covalently conjugated gold–porphyrin nanostructures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7558707/ https://www.ncbi.nlm.nih.gov/pubmed/32825720 http://dx.doi.org/10.3390/nano10091644 |
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