Silver effect on the tribological and antibacterial properties of a-C:Ag coatings

S. Domínguez-Meister; T. C. Rojas; J. E. Frías; J. C. Sánchez-López

doi:10.1016/j.triboint.2019.06.030

Silver effect on the tribological and antibacterial properties of a-C:Ag coatings

S. Domínguez-Meister
, T. C. Rojas
, J. E. Frías
, J. C. Sánchez-López^*

^*Corresponding author for this work

Instituto de Ciencia de Materiales de Sevilla (CSIC-US)
Instituto de Bioquímica Vegetal y Fotosíntesis (CSIC-Univ. Sevilla). Centro de Investigaciones Científicas Isla de la Cartuja

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

a-C:Ag coatings (1.2–23.4 at.% of Ag) were deposited using magnetron sputtering. Ag nanoparticles appear embedded in the carbon matrix or segregated to the column boundaries or surface. The silver doping has not promoted significant changes of the sp²/sp³ ratio although a decrease of the hardness is observed (from 17 to 7 GPa). The tribological behavior did not show a clear dependence on the silver concentration in unlubricated or lubricated conditions (fetal bovinum serum) against alumina or UHMWPE balls. Ag nanoparticle dispersion enhanced the bactericide behavior as determined by the released Ag⁺ ion in the fluid media. There is no clear effect of friction rubbing on the released silver indicating that diffusion and top segregation are prevalent mechanisms for its dissolution.

Original language	English
Article number	105837
Journal	Tribology International
Volume	140
DOIs	https://doi.org/10.1016/j.triboint.2019.06.030
Publication status	Published - Dec 2019
Externally published	Yes

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title = "Silver effect on the tribological and antibacterial properties of a-C:Ag coatings",

abstract = "a-C:Ag coatings (1.2–23.4 at.\% of Ag) were deposited using magnetron sputtering. Ag nanoparticles appear embedded in the carbon matrix or segregated to the column boundaries or surface. The silver doping has not promoted significant changes of the sp2/sp3 ratio although a decrease of the hardness is observed (from 17 to 7 GPa). The tribological behavior did not show a clear dependence on the silver concentration in unlubricated or lubricated conditions (fetal bovinum serum) against alumina or UHMWPE balls. Ag nanoparticle dispersion enhanced the bactericide behavior as determined by the released Ag+ ion in the fluid media. There is no clear effect of friction rubbing on the released silver indicating that diffusion and top segregation are prevalent mechanisms for its dissolution.",

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year = "2019",

month = dec,

doi = "10.1016/j.triboint.2019.06.030",

language = "English",

volume = "140",

journal = "Tribology International",

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T1 - Silver effect on the tribological and antibacterial properties of a-C:Ag coatings

AU - Domínguez-Meister, S.

AU - Rojas, T. C.

AU - Frías, J. E.

AU - Sánchez-López, J. C.

PY - 2019/12

Y1 - 2019/12

N2 - a-C:Ag coatings (1.2–23.4 at.% of Ag) were deposited using magnetron sputtering. Ag nanoparticles appear embedded in the carbon matrix or segregated to the column boundaries or surface. The silver doping has not promoted significant changes of the sp2/sp3 ratio although a decrease of the hardness is observed (from 17 to 7 GPa). The tribological behavior did not show a clear dependence on the silver concentration in unlubricated or lubricated conditions (fetal bovinum serum) against alumina or UHMWPE balls. Ag nanoparticle dispersion enhanced the bactericide behavior as determined by the released Ag+ ion in the fluid media. There is no clear effect of friction rubbing on the released silver indicating that diffusion and top segregation are prevalent mechanisms for its dissolution.

AB - a-C:Ag coatings (1.2–23.4 at.% of Ag) were deposited using magnetron sputtering. Ag nanoparticles appear embedded in the carbon matrix or segregated to the column boundaries or surface. The silver doping has not promoted significant changes of the sp2/sp3 ratio although a decrease of the hardness is observed (from 17 to 7 GPa). The tribological behavior did not show a clear dependence on the silver concentration in unlubricated or lubricated conditions (fetal bovinum serum) against alumina or UHMWPE balls. Ag nanoparticle dispersion enhanced the bactericide behavior as determined by the released Ag+ ion in the fluid media. There is no clear effect of friction rubbing on the released silver indicating that diffusion and top segregation are prevalent mechanisms for its dissolution.

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U2 - 10.1016/j.triboint.2019.06.030

DO - 10.1016/j.triboint.2019.06.030

M3 - Article

AN - SCOPUS:85068130953

SN - 0301-679X

VL - 140

JO - Tribology International

JF - Tribology International

M1 - 105837

ER -

Silver effect on the tribological and antibacterial properties of a-C:Ag coatings

Abstract

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