Plasma sprayed rutile titania-nanosilver antibacterial coatings

Gao, Jiang-Yun; Zhao, Chengjian; Zhou, Jingfang; Li, Chunxia; Shao, Yuchuan; Shi, Chao; Zhu, Yin

doi:10.1016/j.apsusc.2015.07.147

Cited by 10 publications

(4 citation statements)

References 34 publications

(45 reference statements)

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“…coli bacteria increased with an increase in silver nanoparticle concentration . Gao and coauthors reported that even an extremely low concentration of silver nanoparticles of 10 ppm resulted in strong antibacterial activity against both bacteria …”

Section: Resultsmentioning

confidence: 99%

Bioactive Coating on Ti Alloy with High Osseointegration and Antibacterial Ag Nanoparticles

Sobolev

Valkov

Kossenko

et al. 2019

ACS Appl. Mater. Interfaces

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Titanium alloys have advanced mechanical properties jointly with high biocompatibility that make them eminently suitable for biomedical applications such as dental and orthopedic implants. Improvement in their osseointegration with human bone can be achieved by the development of hydroxyapatite (HAp) on a Ti alloy surface using different methods of deposition. However, plasma electrolytic oxidation (PEO) treatment has been found to be one of the most promising techniques, due to the formation of high bonding between the bone and the Ti surface. Along with this high bonding, an antibacterial ability of the surface to prevent bacterial infection is also essential. Silver, which is a widely applicable antibacterial agent, was used in this work. First, a titanium oxide coating containing calcium and phosphorus and Ag nanoparticles was formed by PEO treatment. Then, Ti alloy was subjected to hydrothermal treatment to ensure a crystalline formation of HAp. Morphology and phase composition investigations detected the presence of HAp crystals in the coating along with antibacterial agents of silver nanoparticles. The biocompatibility and bioactivity of the created coating were examined by contact angle (CS) measurement and electrochemical impedance spectroscopy (EIS). It was shown that the coating was extensively grown after exposure of the alloy to simulated body fluid (SBF) solution for 7 days with no effect on the Ag nanoparticles. An antibacterial test using Staphylococcus aureus and Escherichia coli revealed that the coating containing Ag nanoparticles has more significant antibacterial effectiveness compared to a coating that does not contain silver.

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Section: Resultsmentioning

confidence: 99%

Bioactive Coating on Ti Alloy with High Osseointegration and Antibacterial Ag Nanoparticles

Sobolev

Valkov

Kossenko

et al. 2019

ACS Appl. Mater. Interfaces

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“…Titania nanostructured coatings and thin films have attracted extensive attention due to their numerous applications, such as self-cleaning [1,2], anti-bacterial [3][4][5], anti-fungal [6], photocatalysis [7][8][9], biomedical [10,11], air [12] and water [13,14] purification, etc. Various coatings methods have been used for depositing titania layer on substrates, such as sol-gel [15,16], thermal [17,18] and plasma spray [19,20], plasma electrolyte oxidation [21], physical [22] and chemical [23] vapour deposition, tape casting [24], etc. Electrophoretic deposition (EPD) is a colloidal processing technique which has been used for depositing wide range of materials onto the conductive substrates [25].…”

Section: Introductionmentioning

confidence: 99%

Effect of Tris and acetic acid on the stability of titania nanoparticles in different alcohols and their electrophoretic deposition process

Farrokhi-Rad

2018

PAC

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Tris (tris(hydroxymethyl)aminomethane) was used as the dispersant to enhance the colloidal stability of titania nanoparticles in different alcohols (methanol, ethanol, isopropanol and butanol). Acetic acid (AA) was also used to increase the ionization of Tris via acid-base reaction. The effect of Tris on the stability of suspensions in the absence as well as the presence of AA was investigated by different analysis, such as conductivity and zeta potential measurement as well as FTIR analysis. It was found that Tris is protonated and adsorbed on the titania nanoparticles. It enhances their zeta potential and thus colloidal stability. The optimum concentration of Tris increased with molecular weight of alcohol (0.1, 0.2, 0.3 and 0.6 g/l for methanolic, ethanolic, isopropanolic and butanolic suspensions, respectively). The optimum concentration of Tris decreased to 0.1 g/ l for all AA containing suspensions except the methanolic ones. Titania coating was obtained by electrophoretic deposition (EPD) performed at 60 V. The current density and in-situ kinetics of deposition were recorded during EPD. It was found that the kinetics of EPD is the fastest for the suspensions with the optimum concentration of Tris (the highest zeta potential). Calcium phosphate phases were formed on the surface of titania coating after its immersion for one week in SBF at 37.5°C.

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“…Silver has been identified as a material that is very harmful to a wide range of bacteria or even microbes. , It has been discussed that silver ions strongly interact with thiol groups of vital enzymes in microbes and therefore deactivate them . Research groups have studied the influence of the size, shape, and concentration of silver ions or even AgNPs on microbes and their permeability into the microbes. − Besides the direct impregnation of AgNPs, photoreduction reactions can be employed to synthesize nanoparticles in different media such as cells, emulsions, glasses, surfactants, polymer films, and so forth . Such synthesis ways might have a high importance because of their cost efficiency and high versatility.…”

Section: Introductionmentioning

confidence: 99%

Effect of Silver Nanoparticles on the Dielectric Properties and the Homogeneity of Plasma Poly(acrylic acid) Thin Films

2020

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For the first time, structure−electrochemical relationships of thin films of a plasma-polymerized acrylic acid/carbon dioxide AA/ CO 2 (75/25%) copolymer modified by implanted silver nanoparticles are discussed. The pulsed plasma polymerization of AA/CO 2 was utilized and adjusted to obtain a maximal amount of COOH groups forming an almost uncross-linked polymer structure. The prepared polymer layer is rinsed by a silver nitrate solution to impregnate Ag + ions. This step is followed by its reduction of Ag + with NaBH 4 as a chemical route in comparison to the reduction by sunlight as an ecofriendly photoreduction method. The chemical composition and morphology of the topmost surface layer of the AA/CO 2 polymer thin film were investigated by X-ray photoelectron spectroscopy and atomic force microscopy. Moreover, the molecular mobility, conductivity, and thermal stability of the polymer layer were analyzed using broadband dielectric spectroscopy. The dielectric properties of the AA/ CO 2 polymer thin film were studied in the presence of Ag + ions or Ag 0 . It was found that a cross-linked polymer layer with a smooth surface and high conductivity was obtained in the presence of Ag + / Ag 0 .

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Plasma sprayed rutile titania-nanosilver antibacterial coatings

Cited by 10 publications

References 34 publications

Bioactive Coating on Ti Alloy with High Osseointegration and Antibacterial Ag Nanoparticles

Bioactive Coating on Ti Alloy with High Osseointegration and Antibacterial Ag Nanoparticles

Effect of Tris and acetic acid on the stability of titania nanoparticles in different alcohols and their electrophoretic deposition process

Effect of Silver Nanoparticles on the Dielectric Properties and the Homogeneity of Plasma Poly(acrylic acid) Thin Films

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