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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...

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Autores principales: Spitaleri, Luca, Gangemi, Chiara M. A., Purrello, Roberto, Nicotra, Giuseppe, Trusso Sfrazzetto, Giuseppe, Casella, Girolamo, Casarin, Maurizio, Gulino, Antonino
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
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.
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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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