Synthesis of silver/copper nanoparticles and their metalmetal bonding property

Kobayashi, Yoshio; Shirochi, T.; Yasuda, Yusuke; Morita, Toshiaki

doi:10.2298/jmmb120927025k

Cited by 16 publications

(10 citation statements)

References 15 publications

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“…The Young`s modulus is a crucial parameter, as it ensures a strong connection between the implant and the bone [3]. The materials to bone regeneration should have a value of Young`s modulus similar or lower that of a natural human bone (15)(16)(17)(18)(19)(20) [12,13]. Poor mechanical properties caused the fast dissolution of the coatings in a physiological environment [31].…”

Section: Fig 2 Sem Images (With Different Magnifications) and Eds Smentioning

confidence: 99%

“…There are some reports on possible adverse e effects of both alloying elements of the Ti6Al4V: vanadium may provoke cytological responses and neurogenic disorders, and aluminum softens bone, do damage to nerve cells and disturbance of the function of enzymes [7][8][9][10]. The titanium alloy Ti13Zr13Nb possesses no harmful elements (aluminum and vanadium), is characterized by relatively low Young modulus (~ 80 GPa ) [8] compared to Ti6Al4V (~110 GPa) [11] and is more mechanically compatible with the bone (15)(16)(17)(18)(19)(20) [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…The post-surgery treatment after implantation is carried out by an administration of antibiotics. To provide antibacterial properties of the hydroxyapatite coatings, the doping of nanosilver or nanocopper nanoparticles with similar bactericidal effects as antibiotics was investigated [6,19,20]. The bactericidal action of silver was proven for Escherichia coli, Staphylococcus aureus, Staphylococcus albus, Candida albicans and Pseudomonas aeruginosa [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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The Properties of Nanosilver – Doped Nanohydroxyapatite Coating On the Ti13zr13Nb Alloy

Bartmański

2017

Advances in Materials Science

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The aim of this research was to study the properties of nanohydroxyapatite (nanoHAp) and nanohydroxyapatite, doped with nanosilver (nanoHAp/nanoAg), coatings obtained by an electrophoretic deposition process. The suspensions was prepared by dispersing 0.1 g of HAp nanopowder for nanoHAp coatings and 0.1 g of nanoHAp and 0.025 g nanoAg for nanoHAp/nanoAg coatings. The deposition was carried out for 1 min at 50 V voltage followed by drying at room temperature for 24 h and heating at 800°C for 1 h in vacuum. The thickness of the nanoHAp and nanoHAp/nanoAg coatings was found as of about 5 µm. The corrosion behavior tests made by potentiodynamic methods brought out slightly higher values of corrosion current for nanoHAp coatings and nanoHAp/nanoAg coatings as compared to the reference Ti13Zr13Nb specimen. The nanohardness of the nanoHAp coatings achieved 0.020 ± 0.004 GPa and of the nanoHAp/nanoAg coatings 0.026 ± 0.012 GPa. Nanoscratch test of the nanoHAp and nanoHAp/nanoAg coatings revealed an increased Critical Friction (mN) in the presence of nanosilver particles. The wettability angles decreased for nanoHAp/nanoAg coatings comparing to pure nanoHAp coatings on titanium alloy.

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Section: Fig 2 Sem Images (With Different Magnifications) and Eds Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Properties of Nanosilver – Doped Nanohydroxyapatite Coating On the Ti13zr13Nb Alloy

Bartmański

2017

Advances in Materials Science

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“…Dimples accompanied with sharp tips appear on the surfaces of the copper discs bonded with the Ag 0 Cu 100 and the Ag 25 Cu 75 nanoparticles. Metallic materials often form such dimples in strongly bonded regions when they are separated with shear stress (Yan et al 2013;Kobayashi et al 2013b). These observations of dimples support the existence of strong bonding.…”

Section: Bonding In Hydrogen Gasmentioning

confidence: 99%

Metal–metal bonding using silver/copper nanoparticles

et al. 2015

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A method for producing nanoparticles composed of silver and copper and a metal-metal bonding technique using the silver/copper nanoparticles are proposed. The method consists of three steps. First, copper oxide nanoparticles are produced by mixing Cu(NO 3 ) 2 aqueous solution and NaOH aqueous solution. Second, copper metal nanoparticles are fabricated by reducing the copper oxide nanoparticles with hydrazine in the presence of poly(vinylpyrrolidone) (PVP). Third, silver/copper nanoparticles are synthesized by reducing Ag ? ions with hydrazine in the presence of the copper metal nanoparticles. Initial concentrations in the final silver/copper particle colloid, composed of 0.0075 M Cu 2? , 0.0025 M Ag ? , 1.0 g/L PVP, and 0.6 M hydrazine, produced silver/copper nanoparticles with an average size of 49 nm and a crystal size of 16.8 nm. Discs of copper metal were successfully bonded by the silver/copper nanoparticles under annealing at 400°C and pressurizing at 1.2 MPa for 5 min in not only hydrogen gas but also nitrogen gas. The shear force required to separate the bonded discs was 22.3 MPa for the hydrogen gas annealing and 14.9 MPa for the nitrogen gas annealing (namely, 66.8 % of that for hydrogen gas annealing).

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“…The standard procedure for obtaining AgNPs is a chemical reduction of Ag I salts into metallic Ag 0 , which easily aggregate forming metallic clusters . This is made by using appropriate reducing agents which act also as colloidal suspension stabilizers (usually trisodium citrate, sodium borohydride, glucose, chitosan, hydrazine).…”

Section: Introductionmentioning

confidence: 99%

Biopolymers from Composted Biowaste as Stabilizers for the Synthesis of Spherical and Homogeneously Sized Silver Nanoparticles for Textile Applications on Natural Fibers

et al. 2015

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The use of bio-based substances (BBS) obtained from composted biowaste as stabilizers for the production of silver nanoparticles (AgNPs) in substitution to citrate is investigated herein, evaluating the functionalization of natural fibers for textile antibacterial applications. The results obtained evidenced that BBS can substitute citrate as reducing/stabilizing agent in the synthesis, inducing a geometrical control (in shape and size) of the AgNPs. Two different substrates were selected (wool and cotton) and two dip-coating deposition techniques investigated. The release of AgNPs from the supports in water was evaluated under two different experimental conditions: 1) soaking (static conditions) for 7 and 15 days, simulating the contact with sweat, and 2) centrifugation (dynamic conditions), simulating a washing machine treatment. A wide physicochemical characterization was carried out to evaluate the effects of BBS on the morphology and stability of AgNPs suspensions as well as the functionalization effectiveness.

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Synthesis of silver/copper nanoparticles and their metalmetal bonding property

Cited by 16 publications

References 15 publications

The Properties of Nanosilver – Doped Nanohydroxyapatite Coating On the Ti13zr13Nb Alloy

The Properties of Nanosilver – Doped Nanohydroxyapatite Coating On the Ti13zr13Nb Alloy

Metal–metal bonding using silver/copper nanoparticles

Biopolymers from Composted Biowaste as Stabilizers for the Synthesis of Spherical and Homogeneously Sized Silver Nanoparticles for Textile Applications on Natural Fibers

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