Increased Biocompatibility and Bioactivity after Energetic PVD Surface Treatments

Mändl, S.

doi:10.3390/ma2031341

Cited by 19 publications

(9 citation statements)

References 277 publications

(319 reference statements)

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“… Surface topography after ion bombardment: (a) Si surface, 1200 eV Ar + , 15° off-normal; the arrow indicates the projected ion beam direction. (b) Ge surface, 2000 eV Xe + , 20° off-normal [ 164 ]. …”

Section: Selected Applicationsmentioning

confidence: 99%

Thin Film Deposition Using Energetic Ions

2010

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One important recent trend in deposition technology is the continuous expansion of available processes towards higher ion assistance with the subsequent beneficial effects to film properties. Nowadays, a multitude of processes, including laser ablation and deposition, vacuum arc deposition, ion assisted deposition, high power impulse magnetron sputtering and plasma immersion ion implantation, are available. However, there are obstacles to overcome in all technologies, including line-of-sight processes, particle contaminations and low growth rates, which lead to ongoing process refinements and development of new methods. Concerning the deposited thin films, control of energetic ion bombardment leads to improved adhesion, reduced substrate temperatures, control of intrinsic stress within the films as well as adjustment of surface texture, phase formation and nanotopography. This review illustrates recent trends for both areas; plasma process and solid state surface processes.

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Section: Selected Applicationsmentioning

confidence: 99%

Thin Film Deposition Using Energetic Ions

2010

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“…It depends on the following parameters: initial particle size, initial phase, dopant concentration, reaction atmosphere and annealing temperature [ 26 , 27 ]. The TiO 2 films can be synthesized by different methods such as sol-gel, thermal spraying and physical vapor deposition [ 11 , 28 , 29 , 30 ]. In addition, the direct current (DC) reactive magnetron sputtering method is used to control the composition and structure of TiO 2 films, and it provides a strong substrate adhesion and large area with uniform thickness.…”

Section: Introductionmentioning

confidence: 99%

Biocompatibility and Surface Properties of TiO2 Thin Films Deposited by DC Magnetron Sputtering

et al. 2014

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We present the study of the biocompatibility and surface properties of titanium dioxide (TiO2) thin films deposited by direct current magnetron sputtering. These films are deposited on a quartz substrate at room temperature and annealed with different temperatures (100, 300, 500, 800 and 1100 °C). The biocompatibility of the TiO2 thin films is analyzed using primary cultures of dorsal root ganglion (DRG) of Wistar rats, whose neurons are incubated on the TiO2 thin films and on a control substrate during 18 to 24 h. These neurons are activated by electrical stimuli and its ionic currents and action potential activity recorded. Through X-ray diffraction (XRD), the surface of TiO2 thin films showed a good quality, homogeneity and roughness. The XRD results showed the anatase to rutile phase transition in TiO2 thin films at temperatures between 500 and 1100 °C. This phase had a grain size from 15 to 38 nm, which allowed a suitable structural and crystal phase stability of the TiO2 thin films for low and high temperature. The biocompatibility experiments of these films indicated that they were appropriated for culture of living neurons which displayed normal electrical behavior.

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“…However, conformality, defect density and adhesion aspects have to be considered when choosing a suitable method for surface modification. Plasma immersion ion implantation technique (PI3) is one possibility where synergy effects from simultaneous improvements in topology, tribology and corrosion behaviour can be obtained for biomaterials [25]- [27]. The present study describes the surface modification of F-799 CoCr alloy using oxygen PI3.…”

Section: Introductionmentioning

confidence: 99%

Nanomodificated Surface CoCr Alloy for Corrosion Protection of MoM Prosthesis

Dı́az¹,

Mändl²,

Pereiro³

et al. 2015

JBNB

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Problems in metal-on-metal (MoM) hip replacement systems still persist due to high wear rates, low corrosion resistance and release of toxic ions and nanoparticles. As a consequence of these effects, failure, infections, loosening or bone resorption is the typical problems in the hip prosthesis. In order to reduce failure due to corrosion and/or releasing ions and particles, this study presents some works in a novel nanoscale surface modification of cobalt-chromium alloy (CoCr) for obtaining improved surface conditions in these alloys for these applications. Improving corrosion resistant of these alloys and achieving a low wear rate are possible to reduce the total released ions and particles released from the surface of this material. According to it, three different treatments using oxygen at temperatures of 300˚C, 350˚C and 400˚C were carried out by plasma immersion ion implantation technique (PI3). X-ray diffraction (XRD) analysis shows an increase in the formation of chromium oxides in the outer surface of the CoCr alloy. It allows improving in corrosion resistant in CoCr alloys. Moreover, total quantity of released Co, Cr and Mo ions have been reduced. Wear rate studies showed a very similar behaviour after the treatments in relation to untreated CoCr alloy and release rate from the treated surface of CoCr alloys was reduced in comparison with untreated CoCr alloy.

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Increased Biocompatibility and Bioactivity after Energetic PVD Surface Treatments

Cited by 19 publications

References 277 publications

Thin Film Deposition Using Energetic Ions

Thin Film Deposition Using Energetic Ions

Biocompatibility and Surface Properties of TiO2 Thin Films Deposited by DC Magnetron Sputtering

Nanomodificated Surface CoCr Alloy for Corrosion Protection of MoM Prosthesis

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