Use of diamond-like carbon with tungsten (W-DLC) films as biocompatible material

Mansano, Ronaldo Domingues; Ruas, Ronaldo; Mousinho, Ana Paula; Zambom, L.S.; Pinto, Terezinha de Jesus Andreoli; Amoedo, L.H.; Massi, M.

doi:10.1016/j.surfcoat.2007.10.012

Cited by 21 publications

(10 citation statements)

References 18 publications

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“…Recently many researchers have adopted different methodologies to resolve this problem, for example, by doping and/or introducing interlayer between the film and the substrate. Among these methodologies, doping with metallic or non-metallic elements like Ti, Cr, W, Ni, Si, Ag and Co into the DLC matrix has shown promising outcome not only in reducing the internal stress, but also in enhancing the adhesion strength [3], improving the wear resistance [4], reducing the friction coefficient [5], increasing the biocompatibility [6] and other properties of DLC thin film. Recently, it was found that this is mainly due to the presence of metal carbide clusters in the amorphous DLC host matrix.…”

Section: Introductionmentioning

confidence: 99%

Reactive biased target ion beam deposited W–DLC nanocomposite thin films — Microstructure and its mechanical properties

Bharathy

Yang

Kiran

et al. 2012

Diamond and Related Materials

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Tungsten incorporated diamond like carbon (W-DLC) nanocomposite thin films with variable fractions of tungsten were deposited by using reactive biased target ion beam deposition technique. The influence of tungsten incorporation on the microstructure, surface topography, mechanical and tribological properties of the DLC were studied using X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, Atomic force microscope (AFM), transmission electron microscopy (TEM), nano-indentation and nano-scratch tests. The amount of W in films gets increases with increasing target bias voltage and most of the incorporated W reacts with carbon to form WC nanoclusters. Using TEM and FFT pattern, it was found that spherical shaped WC nanoclusters were uniformly dispersed in the DLC matrix and attains hexagonal (W 2 C) crystalline structure at higher W concentration. On the other hand, the incorporation of tungsten led to increase the formation of C-sp 2 hybridized bonding in DLC network and which is reflected in the hardness and elastic modulus of W-DLC films. Moreover, W-DLC films show very low friction coefficient and increased adhesion to the substrate than the DLC film, which could be closely related to its unique nanostructure of the W incorporated thin films.

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Section: Introductionmentioning

confidence: 99%

Reactive biased target ion beam deposited W–DLC nanocomposite thin films — Microstructure and its mechanical properties

Bharathy

Yang

Kiran

et al. 2012

Diamond and Related Materials

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show abstract

“…However, an earlier study performed on Cr-doped DLC films revealed that the presence of chromium did not have a considerable negative effect on the adhesion, proliferation, and viability of human osteoblast-like Saos-2 cells in cultures on these films [30]. Similarly, the DLC films enhanced with tungsten showed no considerable cytotoxicity in vitro [31].…”

Section: Discussionmentioning

confidence: 80%

The Effect of Various Surface Treatments of Ti6Al4V on the Growth and Osteogenic Differentiation of Adipose Tissue-Derived Stem Cells

et al. 2020

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The physical and chemical properties of the material surface, especially its roughness and wettability, have a crucial effect on the adhesion, proliferation, and differentiation of cells. The aim of this study is to select the most appropriate surface modifications of Ti6Al4V implants for pre-colonization of the implants with adipose tissue-derived stem cells (ASCs) in order to improve their osseointegration. We compared the adhesion, growth, and osteogenic differentiation of rat ASCs on Ti6Al4V samples modified by methods commonly used for preparing clinically used titanium-based implants, namely polishing (PL), coating with diamond-like carbon (DLC), brushing (BR), anodizing (AND), and blasting (BL). The material surface roughness, measured by the Ra and Rq parameters, increased in the following order: PL < DLC ˂ BR ˂ AND ˂ BL. The water drop contact angle was in the range of 60–74°, with the exception of the DLC-coated samples, where it was only 38°. The cell number, morphology, mitochondrial activity, relative fluorescence intensity of osteogenic markers RUNX2, type 1 collagen, and osteopontin, the calcium consumption by the cells and the alkaline phosphatase activity depended on the surface roughness rather than on the surface wettability of the materials. Materials with a surface roughness of several tens of nanometers (Ra 60–70 nm), i.e., the BR and AND samples, supported a satisfactory level of cell proliferation. At the same time, they achieved the highest level of osteogenic cell differentiation. These surface modifications therefore seem to be most suitable for pre-colonization of Ti6Al4V implants with stem cells pre-differentiated toward osteoblasts, and then for implanting them into the bone tissue.

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“…Local cytopathologic effects only seemed when particle concentration increased to very high rates (>50 mg/ml) [52]. Besides, diamond-like carbon with tungsten films was produced by using magnetron sputtering coating and this coating was claimed to have higher chemical resistance, lower roughness, and higher biocompatibility in contrast to common DLC films [53]. Supporting these studies, our investigations exhibited that W-Ge coatings had greater cellular spreading, attachment, and biocompatibility properties compared to each metal's unique feature.…”

Section: Resultsmentioning

confidence: 99%

Tribological, biocompatibility, and antibiofilm properties of tungsten–germanium coating using magnetron sputtering

Kurt

Arslan

Yazıcı

et al. 2021

J Mater Sci: Mater Med

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In this study, borosilicate glass and 316 L stainless steel were coated with germanium (Ge) and tungsten (W) metals using the Magnetron Sputtering System. Surface structural, mechanical, and tribological properties of uncoated and coated samples were examined using SEM, X-ray diffraction (XRD), energy-dispersive spectroscopy, and tribometer. The XRD results showed that WGe2 chemical compound observed in (110) crystalline phase and exhibited a dense structure. According to the tribological analyses, the adhesion strength of the coated deposition on 316 L was obtained 32.8 N, and the mean coefficient of friction was around 0.3. Biocompatibility studies of coated metallic biomaterials were analyzed on fibroblast cell culture (Primary Dermal Fibroblast; Normal, Human, Adult (HDFa)) in vitro. Hoescht 33258 fluorescent staining was performed to investigate the cellular density and chromosomal abnormalities of the HDFa cell line on the borosilicate glasses coated with germanium–tungsten (W–Ge). Cell viabilities of HDFa cell line on each surface (W–Ge coated borosilicate glass, uncoated borosilicate glass, and cell culture plate surface) were analyzed by using (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) cytotoxicity assay. The antibiofilm activity of W–Ge coated borosilicate glass showed a significant reduction effect on Staphylococcus aureus (ATCC 25923) and Pseudomonas aeruginosa (ATCC 27853) adherence compared to control groups. In the light of findings, tungsten and germanium, which are some of the most common industrial materials, were investigated as biocompatible and antimicrobial surface coatings and recommended as bio-implant materials for the first time.

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Use of diamond-like carbon with tungsten (W-DLC) films as biocompatible material

Cited by 21 publications

References 18 publications

Reactive biased target ion beam deposited W–DLC nanocomposite thin films — Microstructure and its mechanical properties

Reactive biased target ion beam deposited W–DLC nanocomposite thin films — Microstructure and its mechanical properties

The Effect of Various Surface Treatments of Ti6Al4V on the Growth and Osteogenic Differentiation of Adipose Tissue-Derived Stem Cells

Tribological, biocompatibility, and antibiofilm properties of tungsten–germanium coating using magnetron sputtering

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