Multi-scale characterization and biological evaluation of composite surface layers produced under glow discharge conditions on NiTi shape memory alloy for potential cardiological application

Chlanda, Adrian; Witkowska, Justyna; Morgiel, J.; Nowińska, Katarzyna; Choińska, Emilia; Święszkowski, Wojciech; Wierzchoń, T.

doi:10.1016/j.micron.2018.07.009

Cited by 15 publications

(14 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Obtained SEM data were further verified using atomic force microscopy. It is worth to note that AFM has proven to be a powerful visualization technique for a wide range of nanomaterials and nanoscale changes in the materials [51–53], including qualitative and quantitative analysis of nanopowders [54]. AFM allowed for 3D topography reconstruction and phase-contrast acquisition yielding for deeper insight into nanoscale features of the tested materials.…”

Section: Resultsmentioning

confidence: 99%

Characterization and influence of hydroxyapatite nanopowders on living cells

Oberbek

Bolek

Chlanda

et al. 2018

Beilstein J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

Nanomaterials, such as hydroxyapatite nanoparticles show a great promise for medical applications due to their unique properties at the nanoscale. However, there are concerns about the safety of using these materials in biological environments. Despite a great number of published studies of nanoobjects and their aggregates or agglomerates, the impact of their physicochemical properties (such as particle size, surface area, purity, details of structure and degree of agglomeration) on living cells is not yet fully understood. Significant differences in these properties, resulting from different manufacturing methods, are yet another problem to be taken into consideration. The aim of this work was to investigate the correlation between the properties of nanoscale hydroxyapatite from different synthesis methods and biological activity represented by the viability of four cell lines: A549, CHO, BEAS-2B and J774.1 to assess the influence of the nanoparticles on immune, reproductive and respiratory systems.

show abstract

Section: Resultsmentioning

confidence: 99%

Characterization and influence of hydroxyapatite nanopowders on living cells

Oberbek

Bolek

Chlanda

et al. 2018

Beilstein J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…37 With the addition of a carbon coating (C:N:H) there was a significant decrease in the number of adhered platelets and aggregates when compared to Nitinol coated in just titanium oxide. 37 However, this study was conducted in vitro, and thus, future in vivo studies looking at stent thrombosis are necessary.…”

Section: Coronary Stentsmentioning

confidence: 97%

“…However, most of these modifications have been tested in vitro or ex vivo and further studies in vivo will be necessary to determine their benefit in reducing restenosis and thrombosis. A promising example of one of the surface modifications is treatment of Nitinol in glow‐discharge low‐temperature plasma, which allowed for better control of the crystalline structure of titanium oxide on the surface during manufacturing 37 . With the addition of a carbon coating (C:N:H) there was a significant decrease in the number of adhered platelets and aggregates when compared to Nitinol coated in just titanium oxide 37 .…”

Section: Cardiovascular Applications For Shape Memory Materialsmentioning

confidence: 99%

“…A promising example of one of the surface modifications is treatment of Nitinol in glow‐discharge low‐temperature plasma, which allowed for better control of the crystalline structure of titanium oxide on the surface during manufacturing 37 . With the addition of a carbon coating (C:N:H) there was a significant decrease in the number of adhered platelets and aggregates when compared to Nitinol coated in just titanium oxide 37 . However, this study was conducted in vitro, and thus, future in vivo studies looking at stent thrombosis are necessary.…”

Section: Cardiovascular Applications For Shape Memory Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Smart materials in cardiovascular implants: Shape memory alloys and shape memory polymers

2020

View full text Add to dashboard Cite

Smart materials have intrinsic properties that change in a controlled fashion in response to external stimuli. Currently, the only smart materials with a significant clinical impact in cardiovascular implant design are shape memory alloys, particularly Nitinol. Recent prodigious progress in material science has resulted in the development of sophisticated shape memory polymers. In this article, we have reviewed the literature and outline the characteristics, advantages, and disadvantages of shape memory alloys and shape memory polymers which are relevant to clinical cardiovascular applications, and describe the potential of these smart materials for applications in coronary stents and transcatheter valves.

show abstract

“…Oxide layers can be produced primarily by electrochemical oxidation, gas oxidation or low-temperature glow discharge plasma [6,12,[16][17][18]. They are also used as interlayers for coatings (e.g., carbon layers such as C:N:H; in other words, amorphous hydrogenated nitrogen-containing carbon characterized by good hemocompatibility [19] or hydroxyapatite coatings for bone implants [16,20]. TiO 2 titanium oxide, in particular the polymorphic variant of TiO 2 titanium oxide (i.e., rutile with a nanocrystalline structure), increases biocompatibility when in contact with vascular endothelial cells [20,21].…”

Section: Introductionmentioning

confidence: 99%

Formation of Nitrogen Doped Titanium Dioxide Surface Layer on NiTi Shape Memory Alloy

et al. 2021

Self Cite

View full text Add to dashboard Cite

NiTi shape memory alloys are increasingly being used as bone and cardiac implants. The oxide layer of nanometric thickness spontaneously formed on their surface does not sufficiently protect from nickel transition into surrounding tissues, and its presence, even in a small amount, can be harmful to the human organism. In order to limit this disadvantageous phenomenon, there are several surface engineering techniques used, including oxidation methods. Due to the usually complex shapes of implants, one of the most prospective methods is low-temperature plasma oxidation. This article presents the role of cathode sputtering in the formation of a titanium dioxide surface layer, specifically rutile. The surface of the NiTi shape memory alloy was modified using low-temperature glow discharge plasma oxidation processes, which were carried out in two variants: oxidation using an argon + oxygen (80% vol.) reactive atmosphere and the less chemically active argon + air (80% vol.), but with a preliminary cathode sputtering process in the Ar + N2 (1:1) plasma. This paper presents the structure (STEM), chemical composition (EDS, SIMS), surface topography (optical profilometer, Atomic Force Microscopy—AFM) and antibacterial properties of nanocrystalline TiO2 diffusive surface layers. It is shown that prior cathodic sputtering in argon-nitrogen plasma almost doubled the thickness of the produced nitrogen-doped titanium dioxide layers despite using air instead of oxygen. The (TiOxNy)2 diffusive surface layer showed a high level of resistance to E. coli colonization in comparison with NiTi, which indicates the possibility of using this surface layer in the modification of NiTi implants’ properties.

show abstract

Multi-scale characterization and biological evaluation of composite surface layers produced under glow discharge conditions on NiTi shape memory alloy for potential cardiological application

Cited by 15 publications

References 44 publications

Characterization and influence of hydroxyapatite nanopowders on living cells

Characterization and influence of hydroxyapatite nanopowders on living cells

Smart materials in cardiovascular implants: Shape memory alloys and shape memory polymers

Formation of Nitrogen Doped Titanium Dioxide Surface Layer on NiTi Shape Memory Alloy

Contact Info

Product

Resources

About