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The Correlation Between Elastic Properties and AFM Images of Nanocoatings on Polymers

100%
Gümüş S., Polat Ş., Lackner J., Waldhauser W.
Acta Physica Polonica A
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2015
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vol. 127
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issue 4
1142-1144
EN
In a biomimetic approach for designing implants, both the physical properties (such as topography, elasticity, roughness, hydrophilicity, charges etc.) and the chemical structure of the artificial biomaterial should be considered, since they affect the adhesion of proteins in the nanometer-scale and of the cells in micro-scale at the interface. In this case, surface modification of biomaterials plays a major role because of the expectations from the material surface. These may be realized by changing the surface chemistry, physically or chemically, or by coating it with a material having a certain chemical composition. In this study, surface properties like topography and roughness, and mechanical properties like elastic modulus and hardness are determined for nanocoated materials.
2
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Study of Gas Permeation Through Thin ta-C:H Films

100%
Lackner J., Waldhauser W., Kahn M.
Acta Physica Polonica A
|
2015
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vol. 127
|
issue 4
1236-1239
EN
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 the investigation of the film thickness influence on the gas permeation barrier of ultra-thin, cytocompatible tetrahedral amorphous carbon (ta-C:H) films on polyimide (PI) foils. Plasma-activated chemical vapor deposition (direct deposition from an ion source) was applied to deposit these diamond-like carbon films. The results indicate high barrier to hydrogen gas permeation by all film thicknesses (<0.2% H₂ permeation compared to uncoated PI). While the thickness of the ta-C:H layers has minor influence, the number of layers, realized by one- or double-side deposition strongly impacts the barrier effect. Finally, tests under tensile stresses showed minor impact in the elasto-plastic deformation regime, but the expected strong increase of gas permeation after exceeding the tensile strength and film fracture.
3
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Microscale interpretation of tribological phenomena in Ti/TiN soft-hard multilayer coatings on soft austenite steel substrates

100%
Kot M., Lackner J., Major L.
Bulletin of the Polish Academy of Sciences: Technical Sciences
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2011
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issue 3
4
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Polish Artificial Heart - new coatings, technology, diagnostics

88%
Major B., Sarna J., Kustosz R., Major R., Lackner J.
Bulletin of the Polish Academy of Sciences: Technical Sciences
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2010
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issue 2
5
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Mechanisms for self-assembling topography formation in low-temperature vacuum deposition of inorganic coatings on polymer surfaces

76%
Lackner J., Waldhauser W., Major B., Alamanou A., Teichert C., Schmied F., Major L.
Bulletin of the Polish Academy of Sciences: Technical Sciences
|
2010
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issue 2
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