Effect of Particle Size on Silver Nanoparticle Deposition onto Dielectric Barrier Discharge (DBD) Plasma Functionalized Polyamide Fabric

Vu, Nguyen Cong; Zille, Andrea; Oliveira, Fernando Ribeiro; Carneiro, Noémia; Souto, A. Pedro

doi:10.1002/ppap.201200089

Cited by 51 publications

(44 citation statements)

References 71 publications

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“…[ 64] Results of agar disk diffusion tests to evaluate the antibacterial efficiency of the coatings are shown in Figure 9: while no growth inhibition area can be observed around the uncoated PE and pPAA coated PE samples, a clear zone with no bacterial growth can be clearly detected around the AgNPs/pPAA coated PE samples, similarly to what previously reported also by Sadeghnejad et al; [65] this behavior is indicative of the action Ag ions, probably released from Figure 6. XPS survey spectrum collected for the AgNPs/pPAA coating.…”

Section: Resultssupporting

confidence: 74%

Co‐Deposition of Plasma‐Polymerized Polyacrylic Acid and Silver Nanoparticles for the Production of Nanocomposite Coatings Using a Non‐Equilibrium Atmospheric Pressure Plasma Jet

Liguori

Traldi

Toccaceli

et al. 2015

Plasma Processes & Polymers

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A single step process for the deposition of nanocomposite coatings with silver nanoparticles (AgNPs) embedded in a plasma-polymerized polyacrylic acid (pPAA) matrix and performed using a non-equilibrium atmospheric pressure plasma jet is presented. Acrylic acid (AA) and AgNPs dispersed in ethanol (EtOH) are used as precursors and are separately injected in the plasma region directly; Ar is used as plasma gas and also as carrier gas for both precursors. Scanning electron microscopy (SEM) and ATR-FTIR analysis show the deposition of a micrometric pPAA coating on the polyethylene (PE) film used as substrate; AgNPs embedded in the polymeric matrix are visible in SEM pictures and their presence is confirmed by XPS and EDS analysis. X-ray photoelectron spectroscopy (XPS) also highlights a high retention of carboxylic groups in the pPAA chemical structure and the surface oxidation of AgNPs. Preliminary results of the antibacterial activity of the co-deposited coatings are presented.

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Section: Resultssupporting

confidence: 74%

Co‐Deposition of Plasma‐Polymerized Polyacrylic Acid and Silver Nanoparticles for the Production of Nanocomposite Coatings Using a Non‐Equilibrium Atmospheric Pressure Plasma Jet

Liguori

Traldi

Toccaceli

et al. 2015

Plasma Processes & Polymers

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“…Comprehensive investigations of functionalised textiles in the scientific literature have shown that textiles can be functionalised with well-defined NPs under laboratory conditions (Zhang et al, 2012;Nguyen Khanh et al, 2013). However, it is reasonable to assume that upscaling of functionalization methodologies to the industrial level may result in different outcomes from those achievable under well-controlled laboratory conditions.…”

Section: Discussionmentioning

confidence: 99%

Silver speciation and release in commercial antimicrobial textiles as influenced by washing

et al. 2014

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“…Usually, with an increase in nanoparticle size, the specific surface area and free energy decrease, which should lead to an increase in the contact angle. 9,42 However, several other factors such as surface charge, roughness, and nanoparticle distribution and mass concentration control the contact angle on a fibrous material surface. 43 In contrast to the contact angle, the surface free energy of the plasma-treated PA66 exhibited a certain dependency on the size of the deposited AgNPs.…”

Section: Deconvolution Analysis Of Xps Spectra At Day 30mentioning

confidence: 99%

Size and Aging Effects on Antimicrobial Efficiency of Silver Nanoparticles Coated on Polyamide Fabrics Activated by Atmospheric DBD Plasma

Zille

Fernandes

Francesko

et al. 2015

ACS Appl. Mater. Interfaces

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114

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This work studies the surface characteristics, antimicrobial activity, and aging effect of plasma-pretreated polyamide 6,6 (PA66) fabrics coated with silver nanoparticles (AgNPs), aiming to identify the optimum size of nanosilver exhibiting antibacterial properties suitable for the manufacture of hospital textiles. The release of bactericidal Ag(+) ions from a 10, 20, 40, 60, and 100 nm AgNPs-coated PA66 surface was a function of the particles' size, number, and aging. Plasma pretreatment promoted both ionic and covalent interactions between AgNPs and the formed oxygen species on the fibers, favoring the deposition of smaller-diameter AgNPs that consequently showed better immediate and durable antimicrobial effects against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria. Surprisingly, after 30 days of aging, a comparable bacterial growth inhibition was achieved for all of the fibers treated with AgNPs <100 nm in size. The Ag(+) in the coatings also favored the electrostatic stabilization of the plasma-induced functional groups on the PA66 surface, thereby retarding the aging process. At the same time, the size-related ratio (Ag(+)/Ag(0)) of the AgNPs between 40 and 60 nm allowed for the controlled release of Ag(+) rather than bulk silver. Overall, the results suggest that instead of reducing the size of the AgNPs, which is associated with higher toxicity, similar long-term effects can be achieved with larger NPs (40-60 nm), even in lower concentrations. Because the antimicrobial efficiency of AgNPs larger than 30 nm is mainly ruled by the release of Ag(+) over time and not by the size and number of the AgNPs, this parameter is crucial for the development of efficient antimicrobial coatings on plasma-treated surfaces and contributes to the safety and durability of clothing used in clinical settings.

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Effect of Particle Size on Silver Nanoparticle Deposition onto Dielectric Barrier Discharge (DBD) Plasma Functionalized Polyamide Fabric

Cited by 51 publications

References 71 publications

Co‐Deposition of Plasma‐Polymerized Polyacrylic Acid and Silver Nanoparticles for the Production of Nanocomposite Coatings Using a Non‐Equilibrium Atmospheric Pressure Plasma Jet

Co‐Deposition of Plasma‐Polymerized Polyacrylic Acid and Silver Nanoparticles for the Production of Nanocomposite Coatings Using a Non‐Equilibrium Atmospheric Pressure Plasma Jet

Silver speciation and release in commercial antimicrobial textiles as influenced by washing

Size and Aging Effects on Antimicrobial Efficiency of Silver Nanoparticles Coated on Polyamide Fabrics Activated by Atmospheric DBD Plasma

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