RF deposition of soft hydrogenated amorphous carbon coatings for adhesive interfaces on highly elastic polymer materials

Lackner, J.M.; Major, R.; Major, Ł.; Schöberl, Thomas; Waldhauser, W.

doi:10.1016/j.surfcoat.2009.02.012

Cited by 17 publications

(8 citation statements)

References 22 publications

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“…This fact, together with the lower self-bias applied during the deposition process, proves the sp 3 promoting properties of the microwave plasma (Kaczorowski and Niedzielski 2008). The sp 3 fraction and hydrogen content are well known to be the factors that determine the mechanical properties of carbon coatings; however, high sp 3 content may also affect the adhesion, causing the coating delamination (Lackner et al 2009;Robertson 2002). Higher concentration of sp 2 bonded carbon (graphite-like) obviously decreases the mechanical properties; however, ensures the good flexibility of the coating, which may be critical in this application (Ma et al 2007).…”

Section: Discussionmentioning

confidence: 93%

“…The etching parameters were optimised to guarantee the good adhesion of carbon coatings to PU substrates (Kaczorowski et al 2009). Combination of CVD (Chemical Vapour Deposition) and PVD (Physical Vapour Deposition) allows application of an additional Ti -TixCy gradient interlayer as stress absorbing buffer giving higher flexibility of the coating (Lackner et al 2009). In order to improve the adhesion of Ti interlayer to PU substrate, the etching process was conducted for 10 min in O2/Ar (50/50 ratio) atmosphere under the pressure of 1 Pa and negative r.f.…”

Section: Methodsmentioning

confidence: 99%

“…The hydrogenated (a-C:H) and non-hydrogenated (a-C) as well as tetrahedrally coordinated amorphous carbons (ta-C) are referred to as DLC (Robertson, 2002), whereas the sp 3 /sp 2 bonded carbon ratio are important factors influencing the biological response of DLC surfaces (Ma et al 2007). These coatings have become quite popular in biomedical applications, particularly in cardiovascular, orthopaedic and ophthalmic applications (Narayan 2005;Mitura et al 2006;Kleinen et al 2008;Fedel et al 2009;Lackner et al 2009;Asakawa et al 2011;Batory et al 2012;Batory et al 2014). They are also used in the modification of the surface of polyurethane presenting good flexibility, still maintaining high level of adhesion (Ohgoe et al 2004;Lackner et al 2009).…”

Section: Introductionmentioning

confidence: 99%

“…These coatings have become quite popular in biomedical applications, particularly in cardiovascular, orthopaedic and ophthalmic applications (Narayan 2005;Mitura et al 2006;Kleinen et al 2008;Fedel et al 2009;Lackner et al 2009;Asakawa et al 2011;Batory et al 2012;Batory et al 2014). They are also used in the modification of the surface of polyurethane presenting good flexibility, still maintaining high level of adhesion (Ohgoe et al 2004;Lackner et al 2009). These films demonstrate very high hemocompatibility and lack of cytotoxity (Matsumoto et al 2008;Lackner et al 2012).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Physicochemical and Biological Investigation of Different Structures of Carbon Coatings Deposited onto Polyurethane

Kaczorowski

Batory

Jakubowski

et al. 2016

Braz. arch. biol. technol.

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The aim of this study was to examine the thrombogenic properties of polyurethane that was surface modified with carbon coatings. Physicochemical properties of manufactured coatings were investigated using transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy and contact angle measurement methods. Samples were examined by the Impact-R method evaluating the level of platelets activation and adhesion of particular blood cell elements. The analysis of antimicrobial resistance against

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Section: Discussionmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Physicochemical and Biological Investigation of Different Structures of Carbon Coatings Deposited onto Polyurethane

Kaczorowski

Batory

Jakubowski

et al. 2016

Braz. arch. biol. technol.

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show abstract

“…An approach to reduce the friction under dry and starved lubrication conditions is to deposit DLC on rubber. A lot of studies, from deposition techniques to DLC composition on various rubber materials, such as nitrile butadiene rubber (NBR), hydrogenated nitrile butadiene rubber (HNBR), fluoroelastomer (FKM), and ethylene propylene diene monomer rubber (EPDM), has been done by a Japanese group of Nakahigashi [3,4], Takikawa et al [5][6][7], a Dutch group of Pei and Bui et al [8][9][10][11][12], and other researchers [13,14]. MoS 2 as a solid lubricant is mostly employed with hard surfaces (e.g., metals, ceramics) [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The Potential of Tribological Application of DLC/MoS2 Coated Sealing Materials

et al. 2018

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Abstract:The potential of the combination of hard and soft coating on elastomers was investigated. Diamond-like carbon (DLC), molybdenum disulfide (MoS 2 ) and composite coatings of these two materials with various DLC/MoS 2 ratios were deposited on four elastomeric substrates by means of the magnetron sputtering method. The microstructures, surface energy of the coatings, and substrates were characterized by scanning electron microscopy (SEM) and contact angle, respectively. The chemical composition was identified by X-ray Photoelectron Spectroscopy (XPS). A ball on disc configuration was used as the model test, which was performed under dry and lubricated conditions. Based on the results from the model tests, the best coating was selected for each substrate and subsequently verified in component-like test. There is not one coating that is optimal for all substrates. Many factors can affect the coatings performance. The topography and the rigidity of the substrates are the key factors. However, the adhesion between coatings and substrates, and also the coating processes, can impact significantly on the coatings performance.

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In vitro hemocompatibility of thin films materials for direct blood contact

Trembecka-Wójciga

Major

Lackner

et al. 2016

European Microscopy Congress 2016: Proceedings

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The main objective of the study was modified surface thin film materials deposited on polymer substrate constituting the microenvironment for the uptake and controlled differentiation of stem cells the controlled share caused by residual stress and optimized stiffness of the surface using the plasma methods. Plasma surface modification method generating a controlled part of residual stress in the coating affect the formation of the surface topography in the form of a nano‐ wrinkles similar to the niches in the tissue environment where stem cells are stored. Niches like structures can catch stem cells from blood flow and prevent their rapid differentiation. Topography and stiffness of the surface of the coating allow for targeted cellular differentiation. The properly formed full confluence of the endothelial cells effectively inhibits blood clotting processes. The challenge of the work was to develop the surfaces which would mobilize and activate stem and progenitor cells. The idea was to produce the surface containing the niche like structures, the most appropriate structure for the stem cells. The coatings were developed with controlled residual stresses participation, proper microstructure (Fig. 1) and mechanical properties. Controlled share of residual stress created nano‐wrinkles, similar to the niches where stem cells reside in the natural conditions. The creation of stress generated wrinkles did not lead to delaminating of the coating from the substrate. The coating adhered well to the substrate, and wrinkles provided the cellular microenvironment (Fig. 2). The microstructure and mechanical properties were the key factor that determined the controlled cellular differentiation. The differentiation of stem cells was carried out for endothelial cells formation. The following scientific problems were studied: the anchoring mechanisms of the coating to the polymeric substrate, the effect of ion methods for surface modification towards the microenvironment creation for the stem cells and blood‐ material interaction.

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RF deposition of soft hydrogenated amorphous carbon coatings for adhesive interfaces on highly elastic polymer materials

Cited by 17 publications

References 22 publications

Physicochemical and Biological Investigation of Different Structures of Carbon Coatings Deposited onto Polyurethane

Physicochemical and Biological Investigation of Different Structures of Carbon Coatings Deposited onto Polyurethane

The Potential of Tribological Application of DLC/MoS2 Coated Sealing Materials

In vitro hemocompatibility of thin films materials for direct blood contact

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