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Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions †

Copper-chitosan (Cu-CS) nanoantimicrobials are a novel class of bioactive agents, providing enhanced and synergistic efficiency in the prevention of biocontamination in several application fields, from food packaging to biomedical. Femtosecond laser pulses were here exploited to disrupt a Cu solid t...

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Autores principales: Sportelli, Maria Chiara, Volpe, Annalisa, Picca, Rosaria Anna, Trapani, Adriana, Palazzo, Claudio, Ancona, Antonio, Lugarà, Pietro Mario, Trapani, Giuseppe, Cioffi, Nicola
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5295196/
https://www.ncbi.nlm.nih.gov/pubmed/28336840
http://dx.doi.org/10.3390/nano7010006
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author Sportelli, Maria Chiara
Volpe, Annalisa
Picca, Rosaria Anna
Trapani, Adriana
Palazzo, Claudio
Ancona, Antonio
Lugarà, Pietro Mario
Trapani, Giuseppe
Cioffi, Nicola
author_facet Sportelli, Maria Chiara
Volpe, Annalisa
Picca, Rosaria Anna
Trapani, Adriana
Palazzo, Claudio
Ancona, Antonio
Lugarà, Pietro Mario
Trapani, Giuseppe
Cioffi, Nicola
author_sort Sportelli, Maria Chiara
collection PubMed
description Copper-chitosan (Cu-CS) nanoantimicrobials are a novel class of bioactive agents, providing enhanced and synergistic efficiency in the prevention of biocontamination in several application fields, from food packaging to biomedical. Femtosecond laser pulses were here exploited to disrupt a Cu solid target immersed into aqueous acidic solutions containing different CS concentrations. After preparation, Cu-CS colloids were obtained by tuning both Cu/CS molar ratios and laser operating conditions. As prepared Cu-CS colloids were characterized by Fourier transform infrared spectroscopy (FTIR), to study copper complexation with the biopolymer. X-ray photoelectron spectroscopy (XPS) was used to elucidate the nanomaterials’ surface chemical composition and chemical speciation of the most representative elements. Transmission electron microscopy was used to characterize nanocolloids morphology. For all samples, ξ-potential measurements showed highly positive potentials, which could be correlated with the XPS information. The spectroscopic and morphological characterization herein presented outlines the characteristics of a technologically-relevant nanomaterial and provides evidence about the optimal synthesis parameters to produce almost monodisperse and properly-capped Cu nanophases, which combine in the same core-shell structure two renowned antibacterial agents.
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spelling pubmed-52951962017-03-21 Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions † Sportelli, Maria Chiara Volpe, Annalisa Picca, Rosaria Anna Trapani, Adriana Palazzo, Claudio Ancona, Antonio Lugarà, Pietro Mario Trapani, Giuseppe Cioffi, Nicola Nanomaterials (Basel) Article Copper-chitosan (Cu-CS) nanoantimicrobials are a novel class of bioactive agents, providing enhanced and synergistic efficiency in the prevention of biocontamination in several application fields, from food packaging to biomedical. Femtosecond laser pulses were here exploited to disrupt a Cu solid target immersed into aqueous acidic solutions containing different CS concentrations. After preparation, Cu-CS colloids were obtained by tuning both Cu/CS molar ratios and laser operating conditions. As prepared Cu-CS colloids were characterized by Fourier transform infrared spectroscopy (FTIR), to study copper complexation with the biopolymer. X-ray photoelectron spectroscopy (XPS) was used to elucidate the nanomaterials’ surface chemical composition and chemical speciation of the most representative elements. Transmission electron microscopy was used to characterize nanocolloids morphology. For all samples, ξ-potential measurements showed highly positive potentials, which could be correlated with the XPS information. The spectroscopic and morphological characterization herein presented outlines the characteristics of a technologically-relevant nanomaterial and provides evidence about the optimal synthesis parameters to produce almost monodisperse and properly-capped Cu nanophases, which combine in the same core-shell structure two renowned antibacterial agents. MDPI 2016-12-30 /pmc/articles/PMC5295196/ /pubmed/28336840 http://dx.doi.org/10.3390/nano7010006 Text en © 2016 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
Sportelli, Maria Chiara
Volpe, Annalisa
Picca, Rosaria Anna
Trapani, Adriana
Palazzo, Claudio
Ancona, Antonio
Lugarà, Pietro Mario
Trapani, Giuseppe
Cioffi, Nicola
Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions †
title Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions †
title_full Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions †
title_fullStr Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions †
title_full_unstemmed Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions †
title_short Spectroscopic Characterization of Copper-Chitosan Nanoantimicrobials Prepared by Laser Ablation Synthesis in Aqueous Solutions †
title_sort spectroscopic characterization of copper-chitosan nanoantimicrobials prepared by laser ablation synthesis in aqueous solutions †
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5295196/
https://www.ncbi.nlm.nih.gov/pubmed/28336840
http://dx.doi.org/10.3390/nano7010006
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