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Easy and fast in situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles

Heterostructures of single- and few-layer black phosphorus (2D bP) functionalized with gold nanoparticles (Au NPs) have been recently reported in the literature, exploiting their intriguing properties and biocompatibility for catalytic, therapeutical and diagnostic applications. However, a deeper in...

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Autores principales: Moschetto, Salvatore, Ienco, Andrea, Manca, Gabriele, Serrano-Ruiz, Manuel, Peruzzini, Maurizio, Mezzi, Alessio, Brucale, Marco, Bolognesi, Margherita, Toffanin, Stefano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8383289/
https://www.ncbi.nlm.nih.gov/pubmed/34355729
http://dx.doi.org/10.1039/d1dt02123k
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author Moschetto, Salvatore
Ienco, Andrea
Manca, Gabriele
Serrano-Ruiz, Manuel
Peruzzini, Maurizio
Mezzi, Alessio
Brucale, Marco
Bolognesi, Margherita
Toffanin, Stefano
author_facet Moschetto, Salvatore
Ienco, Andrea
Manca, Gabriele
Serrano-Ruiz, Manuel
Peruzzini, Maurizio
Mezzi, Alessio
Brucale, Marco
Bolognesi, Margherita
Toffanin, Stefano
author_sort Moschetto, Salvatore
collection PubMed
description Heterostructures of single- and few-layer black phosphorus (2D bP) functionalized with gold nanoparticles (Au NPs) have been recently reported in the literature, exploiting their intriguing properties and biocompatibility for catalytic, therapeutical and diagnostic applications. However, a deeper insight on the structural and electronic properties at the interface of the 2D bP/Au NP heterostructure is still lacking. In this work, 2D bP is functionalized with Au nanoparticles (NPs) through in situ deposition–precipitation heterogeneous reaction. The smallest realized Au NPs have a diameter around 10 nm as revealed by atomic-force and scanning electron microscopy, and are partially positively charged as revealed by X-ray Photoelectron Spectroscopy (XPS). XPS, UV-vis and Raman spectroscopy, supported by density functional theory (DFT) calculations, confirmed that while the structural and electronic properties of 2D bP are overall preserved, a soft-pairing between P atoms at the surface of 2D bP and Au atoms at the surface of Au NPs occurs, leading to a partial charge transfer at the 2D bP/Au interface, with a positive charge being localized on the Au atoms directly bonded to 2D bP. DFT calculations also predicted a band gap lowering, by 0.8 eV, for phosphorene functionalized with a tetranuclear Au cluster. Larger effects are expected as the Au cluster nuclearity (and coverage) increases.
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spelling pubmed-83832892021-09-01 Easy and fast in situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles Moschetto, Salvatore Ienco, Andrea Manca, Gabriele Serrano-Ruiz, Manuel Peruzzini, Maurizio Mezzi, Alessio Brucale, Marco Bolognesi, Margherita Toffanin, Stefano Dalton Trans Chemistry Heterostructures of single- and few-layer black phosphorus (2D bP) functionalized with gold nanoparticles (Au NPs) have been recently reported in the literature, exploiting their intriguing properties and biocompatibility for catalytic, therapeutical and diagnostic applications. However, a deeper insight on the structural and electronic properties at the interface of the 2D bP/Au NP heterostructure is still lacking. In this work, 2D bP is functionalized with Au nanoparticles (NPs) through in situ deposition–precipitation heterogeneous reaction. The smallest realized Au NPs have a diameter around 10 nm as revealed by atomic-force and scanning electron microscopy, and are partially positively charged as revealed by X-ray Photoelectron Spectroscopy (XPS). XPS, UV-vis and Raman spectroscopy, supported by density functional theory (DFT) calculations, confirmed that while the structural and electronic properties of 2D bP are overall preserved, a soft-pairing between P atoms at the surface of 2D bP and Au atoms at the surface of Au NPs occurs, leading to a partial charge transfer at the 2D bP/Au interface, with a positive charge being localized on the Au atoms directly bonded to 2D bP. DFT calculations also predicted a band gap lowering, by 0.8 eV, for phosphorene functionalized with a tetranuclear Au cluster. Larger effects are expected as the Au cluster nuclearity (and coverage) increases. The Royal Society of Chemistry 2021-08-02 /pmc/articles/PMC8383289/ /pubmed/34355729 http://dx.doi.org/10.1039/d1dt02123k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Moschetto, Salvatore
Ienco, Andrea
Manca, Gabriele
Serrano-Ruiz, Manuel
Peruzzini, Maurizio
Mezzi, Alessio
Brucale, Marco
Bolognesi, Margherita
Toffanin, Stefano
Easy and fast in situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles
title Easy and fast in situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles
title_full Easy and fast in situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles
title_fullStr Easy and fast in situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles
title_full_unstemmed Easy and fast in situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles
title_short Easy and fast in situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles
title_sort easy and fast in situ functionalization of exfoliated 2d black phosphorus with gold nanoparticles
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8383289/
https://www.ncbi.nlm.nih.gov/pubmed/34355729
http://dx.doi.org/10.1039/d1dt02123k
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