Mechanical properties evaluation of fluor-doped diamond-like carbon coatings by nanoindentation

Trippe, S.C.; Mansano, Ronaldo Domingues; Costa, F.M.; Silva, Rui

doi:10.1016/j.tsf.2003.08.069

Cited by 26 publications

(13 citation statements)

References 19 publications

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“…Dopants in DLC layers modify the hardness, coefficient of friction, surface roughness, adhesion, and even biocompatibility and biomedical properties. For example, the hemocompatibility of implants can be improved by doping of DLC with phosphorus [3], fluorine [4,5], nitrogen [6,7], silicon [8,9] and silver [10]. Their biocompatibility was found to be better than that of low-temperature isotropic carbon [3,7,10].…”

Section: Doping Of Dlc Layersmentioning

confidence: 99%

Chromium-doped DLC for implants prepared by laser-magnetron deposition

Jelínek

Kocourek

Zemek

et al. 2015

Materials Science and Engineering: C

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Section: Doping Of Dlc Layersmentioning

confidence: 99%

Chromium-doped DLC for implants prepared by laser-magnetron deposition

Jelínek

Kocourek

Zemek

et al. 2015

Materials Science and Engineering: C

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“…sited on the surface of the flownsequently decreases cross-linking, which leads to new, more open structural arrangements that can lead to a decrease in the density of a film [29][30][31]. The addition of fluorine also results in a decrease in the hardness and stress of a film [29,30].…”

Section: Hemolysis Testmentioning

confidence: 99%

Improved Hemolytic Performance of Blood Pump with Fluorine-Doped Hydrogenated Amorphous Carbon Coating

Ohgoe

Hiratsuka²,

Sumikura³

et al. 2013

ACES

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Fluorine-doped hydrogenated amorphous carbon (a-C:H:F) film was deposited on a flow-straightener, impeller and diffuser surface (SUS 304) of an enclosed-impeller type flow blood pump using the ionization deposition method with a source gas of C₆F₅H. The surface characteristics of the a-C:H:F film were examined using atomic force microscopy, X-ray photoelectron spectroscopy, and measurements of surface roughness, friction and surface potential. The a-C:H:F film tends to increase surface roughness and the negative surface charge. In addition, the surface energy and friction decrease with fluorine dopant in the a-C:H film. To estimate the hemolytic performance of a blood pump with the a-C:H:F film coating, the amount of hemolysis was measured using a mock circulatory system (in vitro test) with 500 mL of pig blood containing sodium citrate. In vitro test was conducted for 180 min with the blood flow and pump head maintained at 5 L/min and 100 mmHg, respectively. The a-C:H:F film coating reduced the amount of hemolysis and improved the hemolytic performance. Decreasing the surface energy and negative surface charge of the a-C:H:F film contributes to the improvement of the hemolytic performance. The a-C:H:F film coating is thus expected to be utilized in medical technology as a surface coating technology for artificial heart blood pumps.

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“…CF 4 , CHF 3 , etc.) [Trippe et al, 2004;Jiang & Ning, 2006;Guerino et al, 2007] or by directly sputtering a PTFE target [Gonon & Sylvestre, 2002;Tang et al, 2005]. Instead, more work can be found in the literature about PECVD.…”

Section: Fluorine Incorporationmentioning

confidence: 99%