Nanocomposite film with antimicrobial activity based on gold nanoparticles, chitosan and aminopropylsilane

Virgili, Anike H.; Laranja, Daniela Comparsi; Malheiros, Patrícia da Silva; Pereira, Marcelo Barbalho; Costa, Tânia Maria Haas; Menezes, Eliana Weber de

doi:10.1016/j.surfcoat.2021.127086

Cited by 29 publications

(13 citation statements)

References 48 publications

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“…The antimicrobial effect observed for E. coli was greater than for S. aureus . All samples containing CS showed excellent antimicrobial effect [ 106 , 107 , 108 , 109 ]. This study shows, on the one hand, that CS would be effective against more than one type of microorganism, filamentous fungi, as well as bacteria, but in the case of bacteria a greater activity against Gram-negative.…”

Section: Chitosan (Cs)mentioning

confidence: 99%

Two Fascinating Polysaccharides: Chitosan and Starch. Some Prominent Characterizations for Applying as Eco-Friendly Food Packaging and Pollutant Remover in Aqueous Medium. Progress in Recent Years: A Review

2021

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The call to use biodegradable, eco-friendly materials is urgent. The use of biopolymers as a replacement for the classic petroleum-based materials is increasing. Chitosan and starch have been widely studied with this purpose: to be part of this replacement. The importance of proper physical characterization of these biopolymers is essential for the intended application. This review focuses on characterizations of chitosan and starch, approximately from 2017 to date, in one of their most-used applications: food packaging for chitosan and as an adsorbent agent of pollutants in aqueous medium for starch.

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Section: Chitosan (Cs)mentioning

confidence: 99%

Two Fascinating Polysaccharides: Chitosan and Starch. Some Prominent Characterizations for Applying as Eco-Friendly Food Packaging and Pollutant Remover in Aqueous Medium. Progress in Recent Years: A Review

2021

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“…In this case, AgNPs accumulate on the bacterial membrane, thus causing bacteria cell death and the high antibacterial activity of the formed coatings [ 15 , 22 ]. Recently, high antibacterial activity was also reported for CS–AuNP–aminopropylsilane composites [ 23 ]. Another approach includes the introduction of metallic ions with the antibacterial effect, e.g., copper(II) ions, within the CS matrix [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Anodic Electrodeposition of Chitosan–AgNP Composites Using In Situ Coordination with Copper Ions

et al. 2021

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Chitosan is an attractive material for biomedical applications. A novel approach for the anodic electrodeposition of chitosan–AgNP composites using in situ coordination with copper ions is proposed in this work. The surface and cross-section morphology of the obtained coating with varying concentrations of AgNPs were evaluated by SEM, and surface functional groups were analyzed with FT-IR spectroscopy. The mechanism of the formation of the coating based on the chelation of Cu(II) ions with chitosan was discussed. The antibacterial activity of the coatings towards Staphylococcus epidermidis ATCC 35984/RP62A bacteria was analyzed using the live–dead approach. The presented results indicate that the obtained chitosan–AgNP-based films possess some limited anti-biofilm-forming properties and exhibit moderate antibacterial efficiency at high AgNP loads.

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“…Its structure comprises glucosamine and N-acetylglucosamine unit residues, and it exhibits properties such as biocompatibility, biodegradability, and low toxicity [ 1 , 2 , 3 , 4 ]. Additionally, CS is soluble in aqueous acidic media and demonstrates a good film-forming ability [ 5 , 6 ]. The proper combination of such properties allows for the formation of CS–metal nanoparticle bionanocomposites.…”

Section: Introductionmentioning

confidence: 99%

“…The proper combination of such properties allows for the formation of CS–metal nanoparticle bionanocomposites. Among CS-based nanocomposites, CS/gold nanoparticles (CS/AuNPs) are attractive biocomposites because of their great potential in biomedicine [ 5 , 6 , 7 , 8 , 9 ] and in different biosensor [ 10 , 11 , 12 , 13 , 14 , 15 ] for detecting protein [ 16 ], fetoprotein [ 17 , 18 ] and DNA glucose [ 16 , 19 , 20 , 21 ], etc. Several methods have been employed to fabricate Au nanoparticles in a wide variety of shapes and dimensions [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…As CS in solution is protonated and positively charged, it can be adsorbed onto the surfaces of Au nanoparticles because of the interaction between the amino groups in CS and Au nanoparticles [ 2 , 25 ]. Moreover, a previous study [ 5 ] demonstrated that CS stabilizes AuNPs not only in solutions but also in solid films. Such stabilizing and protecting properties of CS for Au nanoparticles can be used to further construct biosensors.…”

Section: Introductionmentioning

confidence: 99%

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Relaxation Phenomena in Chitosan-Au Nanoparticle Thin Films

et al. 2021

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Chitosan–gold nanoparticle (CS/AuNP) thin films were synthesized through the chemical reduction of HAuCl4 in sodium citrate/chitosan solutions. The dielectric and dynamic mechanical behaviors of CS/AuNP films have been investigated as a function of moisture and HAuCl4 content. Two relaxation processes in the nanocomposites have been observed. The α-relaxation process is related to a glass transition in wet CS/AuNP films. However, in dry composites (with 0.2 wt% of moisture content), the glass transition vanished. A second relaxation process was observed from 70 °C to the onset of thermal degradation (160 °C) in wet films and from 33 °C to the onset of degradation in dry films. This relaxation is identified as the σ-relaxation and may be related to the local diffusion process of ions between high potential barriers in disordered systems. The α- and σ-relaxation processes are affected by the HAuCl4 content of the solutions from which films were obtained because of the interaction between CS, sodium succinate, and gold nanoparticles. With about 0.6 mM of HAuCl4, the conductivity of both wet and dry films sharply increased by six orders, corresponding to the percolation effect, which may be related to the appearance of a conductivity pathway between AuNPs, HAuCl4, and NaCl.

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Nanocomposite film with antimicrobial activity based on gold nanoparticles, chitosan and aminopropylsilane

Cited by 29 publications

References 48 publications

Two Fascinating Polysaccharides: Chitosan and Starch. Some Prominent Characterizations for Applying as Eco-Friendly Food Packaging and Pollutant Remover in Aqueous Medium. Progress in Recent Years: A Review

Two Fascinating Polysaccharides: Chitosan and Starch. Some Prominent Characterizations for Applying as Eco-Friendly Food Packaging and Pollutant Remover in Aqueous Medium. Progress in Recent Years: A Review

Anodic Electrodeposition of Chitosan–AgNP Composites Using In Situ Coordination with Copper Ions

Relaxation Phenomena in Chitosan-Au Nanoparticle Thin Films

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