Diamond-like carbon coatings for biomedical applications

Mitura, E.; Mitura, S.; Niedzielski, P.; Haś, Z.; Wolowiec, Remigiusz; Jakubowski, Andrzej; Szmidt, J.; Sokołowska, A.; Louda, Petr; Marciniak, J.; Koczy, B.

doi:10.1016/0925-9635(94)90295-x

Cited by 67 publications

(28 citation statements)

References 5 publications

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“…Carbon films (mainly diamond-like carbon -DLC) fabricated on medical implants by radio frequency plasma enhanced chemical vapor deposition (RF PECVD) have become one of the most intensively investigated options [4][5][6][7][8]. In this technique, the self-bias voltage of the substrate determines the structure and properties of the fabricated films.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Thermal Stresses in Carbon Films Obtained by the Rf Pecvd Method on the Surface of a Cannulated Screw / Analiza Numeryczna Naprezen Cieplnych W Warstwie Weglowej Otrzymanej W Procesie Rf Pecvd Na Powierzchni Wkreta Kostnego

Sawicki¹,

Dudek²,

Kaczmarek³

et al. 2013

Archives of Metallurgy and Materials

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For many years, research on carbon films has been stimulated by the need to simultaneously optimize their biological and mechanical properties and by the challenges related to their deposition on medical implants. The residual mechanical stress occurring inside deposited films is the most important mechanical parameter which leads to the total destruction of these films by cracking and peeling. In the present work, we systematically studied the effect of ion bombardment during the process of radio frequency plasma enhanced chemical vapor deposition (RF PECVD) by monitoring the temperature distribution on a cannulated screw using the infrared technique. The obtained experimental and finite element modeling (FEM) results show that stresses in carbon films deposited on a cannulated screw are quite inhomogeneous and depend on the geometry of the sample and the relative position of the studied contact area between the substrate/film interface and the surface of the film.Keywords: RF PECVD, thermography, carbon films, residual stresses, finite element modeling Od wielu lat prowadzone są badania mające na celu zredukowanie naprężeń, w węglowych warstwach stosowanych na implanty medyczne, bez pogorszenia własności mechanicznych i biologicznych. Niemniej jednak poznanie mechanizmów wywołujących naprężenia wymaga szczegółowej analizy numerycznej. Wysoka wartość naprężeń mechanicznych występujących w osadzanych warstwach prowadzi poprzez pękanie i odwarstwienie do ich całkowitego zniszczenia, co znacząco organiczna praktyczne wykorzystanie warstw węglowych. W prezentowanej pracy, przeanalizowano wpływ bombardowania jonów podczas procesu plazmochemicznego (RF PECVD) na rozkład temperatury na powierzchni śruby ortopedycznej przy użyciu kamery termowizyjnej. Przeprowadzone eksperymenty i uzyskane rezultaty modelowania (MES) pokazały, że naprężenia w warstwach węglowych osadzonych na śrubie ortopedycznej są niejednorodne i zależą od rzeczywistej powierzchni styku pomiędzy podłożem a powłoką jak i geometrii samej próbki.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Thermal Stresses in Carbon Films Obtained by the Rf Pecvd Method on the Surface of a Cannulated Screw / Analiza Numeryczna Naprezen Cieplnych W Warstwie Weglowej Otrzymanej W Procesie Rf Pecvd Na Powierzchni Wkreta Kostnego

Sawicki¹,

Dudek²,

Kaczmarek³

et al. 2013

Archives of Metallurgy and Materials

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“…The combination of high wear and corrosion resistance with bioinert character is a reason for selecting DLC as surface finishing on biomedical instruments or implants [1,2].…”

Section: Introductionmentioning

confidence: 99%

Diamond-like carbon coatings with Ca-O-incorporation for improved biological acceptance

Dorner-Reisel

Schürer

Irmer

et al. 2002

Analytical and Bioanalytical Chemistry

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Diamond-like carbon (DLC) coatings were modified by doping the thin films with Ca-O compounds. Raman spectroscopy indicates growth of sp(2)-hybridised, ordered regions in size and/or number within the amorphous carbon-hydrogen network as a result of the Ca-O-incorporation. CaCO(3) was identified by X-ray induced photoelectron spectroscopy. Proliferation and morphology of L929 mouse fibroblasts reveal improved biocompatibility of Ca-O-modified DLC.

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“…However, physical and chemical influences on their biocompatibility have not yet been fully solved, as described in a review on about 90 different DLC materials [19]. Nevertheless, the cytotoxicity of DLC materials is very low with no in vitro effects on mouse macrophages, human fibroblasts, monocytes, osteoblasts [20,21] even under in vivo conditions in subcutaneous, bone and muscle tissue in guinea pig [22], sheep and rat models [23]). Doping DLC films with fluorine is favorable and results in antithrombotic effects and the suppression of platelet activation [24].…”

Section: Introductionmentioning

confidence: 99%

Gas Permeation, Mechanical Behavior and Cytocompatibility of Ultrathin Pure and Doped Diamond-Like Carbon and Silicon Oxide Films

et al. 2013

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Protective ultra-thin barrier films gather increasing economic interest for controlling permeation and diffusion from the biological surrounding in implanted sensor and electronic devices in future medicine. Thus, the aim of this work was a benchmarking OPEN ACCESSCoatings 2013, 3 269 of the mechanical oxygen permeation barrier, cytocompatibility, and microbiological properties of inorganic ~25 nm thin films, deposited by vacuum deposition techniques on 50 µm thin polyetheretherketone (PEEK) foils. Plasma-activated chemical vapor deposition (direct deposition from an ion source) was applied to deposit pure and nitrogen doped diamond-like carbon films, while physical vapor deposition (magnetron sputtering in pulsed DC mode) was used for the formation of silicon as well as titanium doped diamond-like carbon films. Silicon oxide films were deposited by radio frequency magnetron sputtering. The results indicate a strong influence of nanoporosity on the oxygen transmission rate for all coating types, while the low content of microporosity (particulates, etc.) is shown to be of lesser importance. Due to the low thickness of the foil substrates, being easily bent, the toughness as a measure of tendency to film fracture together with the elasticity index of the thin films influence the oxygen barrier. All investigated coatings are non-pyrogenic, cause no cytotoxic effects and do not influence bacterial growth.

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Diamond-like carbon coatings for biomedical applications

Cited by 67 publications

References 5 publications

Numerical Analysis of Thermal Stresses in Carbon Films Obtained by the Rf Pecvd Method on the Surface of a Cannulated Screw / Analiza Numeryczna Naprezen Cieplnych W Warstwie Weglowej Otrzymanej W Procesie Rf Pecvd Na Powierzchni Wkreta Kostnego

Numerical Analysis of Thermal Stresses in Carbon Films Obtained by the Rf Pecvd Method on the Surface of a Cannulated Screw / Analiza Numeryczna Naprezen Cieplnych W Warstwie Weglowej Otrzymanej W Procesie Rf Pecvd Na Powierzchni Wkreta Kostnego

Diamond-like carbon coatings with Ca-O-incorporation for improved biological acceptance

Gas Permeation, Mechanical Behavior and Cytocompatibility of Ultrathin Pure and Doped Diamond-Like Carbon and Silicon Oxide Films

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