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Article

Covalently Conjugated Gold–Porphyrin Nanostructures

1
Department of Chemical Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
2
National Interuniversity Consortium of Materials Science and Technology (I.N.S.T.M., Research Unit (UdR) of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
3
National Research Council—Institute for Microelectronics and Microsystems (CNR-IMM), Strada VIII, 5, 95121 Catania, Italy
4
Department of Earth and Sea Sciences, University of Palermo, Via Archirafi 22, 90123 Palermo, Italy
5
Department of Chemical Sciences, University of Padova, Via Francesco Marzolo 1, 35131 Padova, Italy
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(9), 1644; https://doi.org/10.3390/nano10091644
Received: 6 June 2020 / Revised: 14 August 2020 / Accepted: 18 August 2020 / Published: 21 August 2020
(This article belongs to the Section Synthesis, Interfaces and 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 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. View Full-Text
Keywords: gold nanoparticle; porphyrin; surface plasmon resonance; luminescence; nanostructures gold nanoparticle; porphyrin; surface plasmon resonance; luminescence; nanostructures
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MDPI and ACS Style

Spitaleri, L.; Gangemi, C.M.A.; Purrello, R.; Nicotra, G.; Trusso Sfrazzetto, G.; Casella, G.; Casarin, M.; Gulino, A. Covalently Conjugated Gold–Porphyrin Nanostructures. Nanomaterials 2020, 10, 1644. https://doi.org/10.3390/nano10091644

AMA Style

Spitaleri L, Gangemi CMA, Purrello R, Nicotra G, Trusso Sfrazzetto G, Casella G, Casarin M, Gulino A. Covalently Conjugated Gold–Porphyrin Nanostructures. Nanomaterials. 2020; 10(9):1644. https://doi.org/10.3390/nano10091644

Chicago/Turabian Style

Spitaleri, Luca; Gangemi, Chiara M.A.; Purrello, Roberto; Nicotra, Giuseppe; Trusso Sfrazzetto, Giuseppe; Casella, Girolamo; Casarin, Maurizio; Gulino, Antonino. 2020. "Covalently Conjugated Gold–Porphyrin Nanostructures" Nanomaterials 10, no. 9: 1644. https://doi.org/10.3390/nano10091644

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