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Article

Sputter-Deposited Ag Nanoparticles on Electrospun PCL Scaffolds: Morphology, Wettability and Antibacterial Activity

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SSPT-PROMAS-MATAS, ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, S.S. 7 Appia, km 706, 72100 Brindisi, Italy
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SSPT-PROMAS-NANO, ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Piazzale E. Fermi, 1, Portici, 80055 Napoli, Italy
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SSPT-TECS-TEB, ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Via Anguillarese 301, 00123 Rome, Italy
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NANOFABER srl, Via Anguillarese 301, 00123 Rome, Italy
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SSPT-PROMAS-MATPRO, ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Via Anguillarese 301, 00123 Rome, Italy
*
Authors to whom correspondence should be addressed.
Academic Editor: Jean-François Berret
Coatings 2021, 11(3), 345; https://doi.org/10.3390/coatings11030345
Received: 23 February 2021 / Revised: 10 March 2021 / Accepted: 12 March 2021 / Published: 18 March 2021
(This article belongs to the Special Issue Antibacterial Surfaces, Thin Films, and Nanostructured Coatings)
Porous scaffolds made of biocompatible and environmental-friendly polymer fibers with diameters in the nano/micro range can find applications in a wide variety of sectors, spanning from the biomedical field to textiles and so on. Their development has received a boost in the last decades thanks to advances in the production methods, such as the electrospinning technique. Conferring antimicrobial properties to these fibrous structures is a primary requirement for many of their applications, but the addition of antimicrobial agents by wet methods can present a series of drawbacks. In this work, strong antibacterial action is successfully provided to electrospun polycaprolactone (PCL) scaffolds by silver (Ag) addition through a simple and flexible way, namely the sputtering deposition of silver onto the PCL fibers. SEM-EDS analyses demonstrate that the polymer fibers get coated by Ag nanoparticles without undergoing any alteration of their morphological integrity upon the deposition process. The influence on wettability is evaluated with polar (water) and non-polar (diiodomethane) liquids, evidencing that this coating method allows preserving the hydrophobic character of the PCL polymer. Excellent antibacterial action (reduction > 99.995% in 4 h) is demonstrated against Escherichia coli. The easy fabrication of these PCL-Ag mats can be applicable to the production of biomedical devices, bioremediation and antifouling systems in filtration, personal protective equipment (PPE), food packaging materials, etc. View Full-Text
Keywords: antimicrobial; polycaprolactone (PCL); silver nanoparticles; nanofibers; electrospinning; sputtering; antibacterial; antiviral; biomedical; bioremediation; antifouling antimicrobial; polycaprolactone (PCL); silver nanoparticles; nanofibers; electrospinning; sputtering; antibacterial; antiviral; biomedical; bioremediation; antifouling
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MDPI and ACS Style

Valerini, D.; Tammaro, L.; Vitali, R.; Guillot, G.; Rinaldi, A. Sputter-Deposited Ag Nanoparticles on Electrospun PCL Scaffolds: Morphology, Wettability and Antibacterial Activity. Coatings 2021, 11, 345. https://doi.org/10.3390/coatings11030345

AMA Style

Valerini D, Tammaro L, Vitali R, Guillot G, Rinaldi A. Sputter-Deposited Ag Nanoparticles on Electrospun PCL Scaffolds: Morphology, Wettability and Antibacterial Activity. Coatings. 2021; 11(3):345. https://doi.org/10.3390/coatings11030345

Chicago/Turabian Style

Valerini, Daniele, Loredana Tammaro, Roberta Vitali, Gloria Guillot, and Antonio Rinaldi. 2021. "Sputter-Deposited Ag Nanoparticles on Electrospun PCL Scaffolds: Morphology, Wettability and Antibacterial Activity" Coatings 11, no. 3: 345. https://doi.org/10.3390/coatings11030345

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