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Wyszukujesz frazę "thin layers" wg kryterium: Temat


Tytuł:
Physiochemical and biological evaluation of thin CNTs layers
Autorzy:
Benko, A.
Przekora, A.
Nocuń, M.
Wesełucha-Birczyńska, A.
Ginalska, G.
Błażewicz, M.
Tematy:
EPD
MWCNTs
thin layers
biocompatibility
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:
https://bibliotekanauki.pl/articles/286004.pdf  Link otwiera się w nowym oknie
Opis:
Carbon nanotubes are nanometric-sized materiale which possess a set of interesting features that favor their applications in various fields of materials engineering, including biomedical applications. However, their usage as implants or in nanomedicine raises many questions, regarding their potential cytotoxicity, relative to their length, diameter, structure and functional groups, present on their outer walls. The given study presents a physiochemical and biological in vitro (in accordance with EN-ISO 10993-5) evaluation of thin carbon nanotubes films, deposited on the surface of titanium, by means of the EPD process. Experiments were carried out on commercially available, pre-functionalized with OH groups, multi-walled carbon nanotubes. The obtained material is proven to be biocompatible, with no cytotoxic effect on the human fetal osteoblast cell line. During the study, selectivity of the EPD process was proven - performed experiments revealed that the process favors deposition of CNTs with chosen set of features from the stock solution. Presented results point out that the EPD process can be successfully applied as a method for fractioning the CNTs, aimed to fabricate non-toxic layers that might be considered for various biomedical applications.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring vital functions of A-375 melanoma cell cultures via thin-film nickel capacitors
Autorzy:
Wilczyńska, Aleksandra
Kociubiński, Andrzej
Zarzeczny, Dawid
Szypulski, Maciej
Pigoń, Dominika
Małecka-Massalska, Teresa
Prendecka-Wróbel, Monika
Tematy:
ECIS
nickel
thin layers
melanoma
magnetron sputtering
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:
https://bibliotekanauki.pl/articles/1844972.pdf  Link otwiera się w nowym oknie
Opis:
This article deals in the constantly developing branch of microelectronic devices used in various fields of medicine, i.e. diagnostics and treatment of previously incurable human diseases. A method for assessing and monitoring the vital functions of living cells by measuring cellular impedance in real-time using the ECIS® system and a commercial culture substrate is presented. The goal was to develop a substrate significantly less expensive than a commercial substrate that would be suitable for multiple uses and compatible with the ECIS® measurement station. Moreover, thanks to the use of a material with electrochemical properties other than the biocompatible material (gold or platinum) it is possible to observe the cells behavior with regard to the toxic agent. For this purpose, a culture substrate with nickel comb capacitors was used. To make the electrodes, a thin metal layer was sputtered on polycarbonate plates in the magnetron sputtering process. Prior to the next stages, technological masks were designed so as to fit in the ECIS® measuring station. Subsequently, the microelectronic processes of photolithography and etching the metal layer were performed. Finally, the wells were glued onto the culture medium with a biocompatible adhesive. The completed substrates were transferred to the Department of Human Physiology, Medical University of Lublin, for the culture test on A-375 human melanoma cells. The results of the experiment determined the usefulness of the device for monitoring cell culture vital functions by means of impedance measurement.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser modified functional carbon-based coatings on titanium substrate for cardiac tissue integration and blood clotting inhibition
Autorzy:
Major, Roman
Ostrowski, Roman
Surmiak, Marcin
Trembecka-Wójciga, Klaudia
Lackner, Jurgen
Tematy:
thin layers
migration channels
laser ablation
microstructure
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:
https://bibliotekanauki.pl/articles/1844973.pdf  Link otwiera się w nowym oknie
Opis:
The work focused on developing functional coatings on titanium substrates that would facilitate the integration with the cardiac tissue and with a specific form of connective tissue like blood. Surface modifications consisted in the laser evaporation of part of the biocompatible layer, thus creating a suitable environment for a particular tissue. For the myocardium integration, the metal surface was refined by biohemocompatible coatings. Such surfaces were the starting point for further modifications in the form of channels. The channeled surfaces enabled a controlled cell migration and proliferation. The interaction of endothelial cells with the material was highly dependent on the surface characteristics such as: topography, microstructure or mechanical properties. The controlled cellular response was achieved by modifying the surface to obtain a network of wells or channels of different dimensions via the laser interference lithography. This technique determined a high resolution shape, size and distribution patterns. As a result, it was possible to control cells in the scale corresponding to biological processes. The surface periodization ensured the optimal flow of oxygen and nutrients within the biomaterial, which was of a key importance for the cell adhesion and proliferation. The work attempted at producing the surface networks mimicking natural blood vessels. To stimulate the formation of new blood vessel the finishing resorbable synthetic coatings were applied on the surface to act as a drug carrier. Therefore, the initial trial to introduce factors stimulating the blood vessels growth was performed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Manufacturing of thin nickel-rich alloy films on powder substrate using magnetron sputtering technique
Autorzy:
Bordolińska, Klaudia
Tematy:
ICP analysis
layer thickness
magnetron sputtering
thin layers
Pokaż więcej
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:
https://bibliotekanauki.pl/articles/1179518.pdf  Link otwiera się w nowym oknie
Opis:
The magnetron sputtering technology has been applied to obtain five kinds of thin, nickel-rich layers on tungsten powder substrate. Circular plates (30 mm in diameter) of pure nickel (99.9%), inconel 600 (72% Ni, 17% Cr, 10% Fe), inconel 601 (63% Ni, 25% Cr, 7.6% Fe), inconel c-276 (51% Ni, 16.5% Cr, 17% Mo) and incoloy H / HT (35% Ni, 23% Cr, 39.5% Fe) were used as sputtering targets. The nickel-based layers have been deposited on pure tungsten powder (2 g; fraction 20-50 µm). After 2 hours of sputtering, the produced layers have been dissolved in 2M HCl solution. The obtained solutions were then analyzed on Ni2+, Cr3+, Fe2+ or Mo2+ ions. The analysis data allows for evaluation of the thickness of the obtained coatings.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The method of moments in Jiles–Atherton model based magnetostatic modelling of thin layers
Autorzy:
Szewczyk, R.
Tematy:
Jiles–Atherton model
magnetostatic
thin layers
method of moments
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/140580.pdf  Link otwiera się w nowym oknie
Opis:
The method of moments enables effective magnetostatic modelling of thin layers, where thickness of the layer should be considered. This paper presents the non-linear extension for this method of modelling. An initial magnetization curve, necessary for modelling, was reconstructed from saturation hysteresis loops on the basis of the Jiles–Atherton model. Finally, the set of non-linear equations was stated, and an example of solution for a square-shaped magnetic thin layer is presented.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface modification of polypropylene nonwoven with composite metallic layers
Autorzy:
Reszka, K.
Dobruchowska, E.
Koprowska, J.
Wiśniewski, B.
Tematy:
polymer fibres
polypropylene
surface
magnetron
deposition
thin layers
SEM
EDS
Pokaż więcej
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Powiązania:
https://bibliotekanauki.pl/articles/242954.pdf  Link otwiera się w nowym oknie
Opis:
Polymer fibres have the great potential for application due to their large surface area relative to volume, incomparably large length relative to the cross-section, high strength and ease of forming the nonwovens in thermal processing. Due to the specific properties of textiles, they are applied, among others in the manufacture of filters, sensors, biomedical devices and protective clothing. This study was aimed to evaluate the surface morphology of polypropylene nonwoven modified with metallic layers CuSn, CuZnNi, NiCuFe, deposited by the magnetron sputtering technique. There was also carried out a qualitative and quantitative analysis of deposited thin layers and their compositions were compared with compositions of targets used for magnetrons. The surface morphology was tested using the metallographic optical microscope with a CF160 optical system and the scanning electron microscope adapted to work in an environmental mode. A study of composition was based on a microanalysis using the energy dispersive X-ray radiation deriving from the excited atoms (EDS).
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superstructure transformations in high-temperature intermetallic nanolayers : atomistic simulation
Autorzy:
Abdank-Kozubski, Rafał
Goyhenex, Christine
Kozłowski, Mirosław
Wydawca:
Trans Tech Publications
Opis:
Superstructure transformation processes in intermetallics have beenstudied at the atomistic scale using Monte Carlo algorithms within two dis-tinct models: two-body interactions Ising-like system and Analytic Bond-Order Potentials. The transformation from "in-plane" to "off-plane" L10 vari-ant in [001]-oriented FePt nano-layers was observed and analysed by analyt-ical calculations providing clear explanation of the origin of the process, aswell as by "rigid-lattice" and "off-lattice" Monte Carlo simulations showingthe kinetics of the superstructure transformation.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Scanning acoustic microscopy for non-destructive tests of electronic components
Autorzy:
Sutor, A.
Winkler, G.
Bischoff, G.
Tematy:
scanning acoustic microscopy
printed circuit boards
thick film
thin layers
microelectronic packages
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Elektronowej
Powiązania:
https://bibliotekanauki.pl/articles/378445.pdf  Link otwiera się w nowym oknie
Opis:
Scanning acoustic microscopy (SAM) is an attractive tool in the non-destructive inspection of printed circuit boards, thick film, thin layers and microelectronic packages. For example it permits to detect subsurface delaminations, cracks and pores (air bubbles) for different materials: metals, plastics, ceramics or composites. The examples of different electronic components and circuits observed in SONOSCAN D-9000 ultrasonic microscope with frequencies of transducers between 10 Mhz and MHz and 230 MHz are presented in this paper.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of metal surfaces coated with europium-doped titanium dioxide by laser induced breakdown spectroscopy
Autorzy:
Głogocka, D.
Noculak, A.
Pucińska, J.
Jopek, W.
Podbielska, H.
Langner, M.
Przybyło, M.
Tematy:
europ
tytan
LIBS
jakość
kompozycja
cienkie warstwy
europium
titanum
quality
composition
thin layers
Pokaż więcej
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/306866.pdf  Link otwiera się w nowym oknie
Opis:
The surface passivation with titanium sol-gel coatings is a frequently used technique to control the adsorption of selected biological macromolecules and to reduce the exposure of the bulk material to biological matter. Due to the increasing number of new coating-preparation methods and new gel compositions with various types of additives, the quality and homogeneity determination of the surface covering is a critical factor affecting performance of any implanted material. While coating thickness is easy to determine, the homogeneity of the surface distribution of coating materials requires more elaborate methodologies. In the paper, the laser induced breakdown spectroscopy (LIBS) based method, capable to quantitate the homogeneity and uniformity of the europium in titanium dioxide sol-gel coatings on stainless steel surfaces prepared with two different procedures: spin-coating and dip-coating, is presented. The emission intensity of titanium has been used to determine the coating thickness whereas the relative values of europium and titanium emission intensities provide data on the coating homogeneity. The obtained results show that the spin-coating technique provides better surface coverage with titanium dioxide. However, when the surface coating compositions were compared the dip-coating technique was more reliable.
Dostawca treści:
Biblioteka Nauki
Artykuł

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