Temat: pulsed laser ablation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Migration channels produced by laser ablation for substrate endothelialization
Autorzy:: Major, R.
Maksymow, K.
Marczak, J.
Lackner, J.
Kot, M.
Major, B.
Powiązania:: https://bibliotekanauki.pl/articles/201285.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: inorganic coatings
pulsed laser ablation
tissue scaffold
endothelial cells migration
Opis:: Seeding of cells on functional, biocompatible scaffolds is a crucial step in achievement the desired engineered tissue. In the present study, a pulsed laser modification onto inorganic substrate was made to promote endothelium cells migration and spread. Presented scaffolds were fabricated on carbon and titanium based coatings. Fabricated films provided very good mechanical properties together with a chemical stability preservation. The substrate modification consisted of grid-like template fabrication of micrometer size meshes. The microstructure analysis of laser traces revealed the grain size increase in the zone of laser beam interaction, which exerts an influence on a surface topography. Endothelium cells locomotion was observed within 10 day time period. As a result it was shown that the modified area enhanced cells adhesion with a preferred static behavior. The performed research work improved our understanding on the pulsed laser ablation process and template size influence on cells spatial arrangement. It constituted an important step towards fabrication of inorganic, biocompatible scaffolds for successful substrate endothelialization.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 2; 337-342
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Desorption/ablation of lithium fluoride induced by extreme ultraviolet laser radiation
Autorzy:: Blejchař, T.
Nevrlý, V.
Vašinek, M.
Dostál, M.
Kozubková, M.
Dlabka, J.
Stachoň, M.
Juha, L.
Bitala, P.
Zelinger, Z.
Pira, P.
Wild, J.
Powiązania:: https://bibliotekanauki.pl/articles/146227.pdf
Data publikacji:: 2016
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: desorption
fluid dynamics
lithium fluoride
numerical simulation
plume expansion
pulsed laser ablation
Opis:: The availability of reliable modeling tools and input data required for the prediction of surface removal rate from the lithium fluoridetargets irradiated by the intense photon beams is essential for many practical aspects. This study is motivated by the practical implementation of soft X-ray (SXR) or extreme ultraviolet (XUV) lasers for the pulsed ablation and thin fi lm deposition. Specifically, it is focused on quantitative description of XUV laser-induced desorption/ablation from lithium fluoride, which is a reference large band-gap dielectric material with ionic crystalline structure. Computational framework was proposed and employed here for the reconstruction of plume expansion dynamics induced by the irradiation of lithium fluoridetargets. The morphology of experimentally observed desorption/ablation craters were reproduced using idealized representation (two-zone approximation) of the laser fluence profile. The calculation of desorption/ablation rate was performed using one-dimensional thermomechanic model (XUV-ABLATOR code) taking into account laser heating and surface evaporation of the lithium fluoridetarget occurring on a nanosecond timescale. This step was followed by the application of two-dimensional hydrodynamic solver for description of laser-produced plasma plume expansion dynamics. The calculated plume lengths determined by numerical simulations were compared with a simple adiabatic expansion (blast-wave) model. The availability of reliable modeling tools and input data required for the prediction of surface removal rate from the lithium fluoridetargets irradiated by the intense photon beams is essential for many practical aspects. This study is motivated by the practical implementation of soft X-ray (SXR) or extreme ultraviolet (XUV) lasers for the pulsed ablation and thin fi lm deposition. Specifically, it is focused on quantitative description of XUV laser-induced desorption/ablation from lithium fluoride, which is a reference large band-gap dielectric material with ionic crystalline structure. Computational framework was proposed and employed here for the reconstruction of plume expansion dynamics induced by the irradiation of lithium fluoridetargets. The morphology of experimentally observed desorption/ablation craters were reproduced using idealized representation (two-zone approximation) of the laser fluence profile. The calculation of desorption/ablation rate was performed using one-dimensional thermomechanic model (XUV-ABLATOR code) taking into account laser heating and surface evaporation of the lithium fluoridetarget occurring on a nanosecond timescale. This step was followed by the application of two-dimensional hydrodynamic solver for description of laser-produced plasma plume expansion dynamics. The calculated plume lengths determined by numerical simulations were compared with a simple adiabatic expansion (blast-wave) model.
Źródło:: Nukleonika; 2016, 61, 2; 131-138
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Ocena wpływu wybranych parametrów impulsowej wiązki laserowej na wydajność procesu ablacji tytanu
Evaluation of the impact of selected parameters of pulsed laser beam on the efficiency of titanium ablation processes
Autorzy:: Bujak, J.
Powiązania:: https://bibliotekanauki.pl/articles/256935.pdf
Data publikacji:: 2006
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: impulsowa wiązka laserowa
ablacja laserowa
wydajność
titanium
ablation process
pulsed laser beam
laser radiation
efficiency
Opis:: Na podstawie przeprowadzonych badań określono wpływ podstawowych parametrów wiązki promieniowania laserowego (gestość energii, czestość repetycji impulsów) na wydajność procesu ablacji tytanu. Wydajność procesu ablacji laserowej oceniano poprzez wyznaczenie objetości materiału odparowanego podczas jednego impulsu akcji laserowej. W ramach wykonanych badań określono optymalne wartości gęstości energii wiązki i częstości repetycji impulsów dla przeprowadzenia procesu ablacji badanego materiału.
On the basis of the studies carried out an influence of basic parameters of laser radiation (energy density, pulse repetition rate) on the efficiency of the ablation process of titanium target was determined. The process efficiency was evaluated by estimation of the evaporated material volume during a single laser radiation pulse. In the course of research most favourable values of the laser fluence and pulse repetition rate for the ablation process of the investigated material were determined.
Źródło:: Problemy Eksploatacji; 2006, 3; 65-73
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

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