Temat: nanostructures - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Silicone nanostructures
Autorzy:: Nowakowska, Maria
Kępczyński, Mariusz
Kuźmicz, Danuta
Romek, Marek
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 2.

Tytuł:: Energy dependence of nanopillars formation on InSb semiconductor surfaces under gallium FIB and noble gas ions beam irradiation
Autorzy:: Wrana, Dominik
Jany, Benedykt
Pędrys, Roman
Nikiel, Marek
Krok, Franciszek
Trynkiewicz, Elżbieta
Szajna, Konrad
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 3.

Tytuł:: Formation of $ZrO_2$ with unusual morphology and Zr surface patterning via one-step anodization of zirconium in aqueous electrolyte
Autorzy:: Ryczek, Katarzyna
Kuciel, Tomasz
Zaraska, Leszek
Tynkevych, Olena
Opis:: A simple one-step anodization of Zr in aqueous electrolyte was employed for the fabrication of nanostructured $ZrO_{2}$ with various morphologies as well as for controllable nanostructuring of Zr metal surface. The Zr foils were anodized for various durations (10–30 min) at the constant potential from the range 10–50 V in an electrolyte containing $1 M (NH_{4})_{2}SO_{4}$ and 0.5% wt. NH4F at room temperature. The morphology of the obtained materials has been verified by SEM and AFM, and correlated in detail with anodizing conditions. Depending on the voltage applied during anodization, both nanotubular and nanoporous zirconia films with a thickness of up to 30 μm were successfully obtained. Moreover, the generation of nanostructured $ZrO_{2}$ with unusual morphology consisting of much larger channels/tubes within a “matrix” of narrower species was presented for the first time. Careful adjustment of anodizing conditions allowed for the formation of free-standing and mechanically stable zirconia films without the need for any post-treatment procedures like potential shock or cathodic polarization. Finally, the procedure of Zr anodization was also found to be an effective strategy for the generation of nanosized patterns with precisely defined morphologies on the metal surface.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 4.

Tytuł:: Nanotechnology in oncology - current state of knowledge
Autorzy:: Laskowska, Dorota
Ziółkowska, Ewa
Mitura, Katarzyna
Tematy:: nanotechnology
oncology
nanostructures
cancer treatment; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:: https://bibliotekanauki.pl/articles/286080.pdf Link otwiera się w nowym oknie
Opis:: Nanotechnology is an interdisciplinary area of science devoted to the production and testing of nanostructures - defined as forms of the matter organizations the size of which does not exceed 100 nm. It is a quickly developing area of science with many applications in different areas of life, for example in engineering, computing, medicine, pharmacy, andagriculture. One of the problems of contemporary oncology is the low specificity of applied therapies. Most currently used chemiopharmaceuticals have systemic effects which not only affect cancer cells but alsohealthy tissues. Complications after chemotherapy observed in many patients are bone marrow deficiency(neutropenin, thrombocytopenia, anemia), damageto the nervous system (neurotoxicity), myocardium(cardiotoxicity) and pulmonary parenchyma. Similarly, in radiotherapy, ionizing radiation destroys the healthy tissues in the irradiation field. The side effects of radiation therapy may include fatigue, skin reactions, and impairment of tissue and organ functions. According to studies, nanostructures are an opportunity to overcome these limitations. The most popular nanostructures used in medicine are liposomes, silver and gold nanoparticles, magnetic nanoparticles, carbonnanotubes, and dendrimers. The purpose of this article is to present the current state of knowledge on the use of available nanotechnology solutions in pharmacology and cancer treatment.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Gas sensors based on nanostructures of semiconductors ZnO and TiO2
Autorzy:: Pustelny, T.
Procek, M.
Maciak, E.
Stolarczyk, A.
Drewniak, S.
Urbańczyk, M.
Setkiewicz, M.
Gut, K.
Opilski, Z.
Tematy:: gas sensors
nanostructures
TiO2
ZnO; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/201719.pdf Link otwiera się w nowym oknie
Opis:: The paper presents a resistance structures with sensor layers based on nanostructures elaborated on the base of TiO2 and ZnO. The structures were tested concerning their sensitivities to the effects of nitrogen dioxide in the atmosphere of synthetic air. The TiO2 and ZnO nanostructures played the role of sensor layers. Investigations have proved that the elaborated resistance structures with TiO2 and ZnO layers are sensitive to the presence of NO2 in the atmosphere of synthetic air. The resistance of the structure amounted to about 20 in the case of ZnO structures and to about 200 in the case of TiO2 structures. The investigations confirmed that resistance structures with ZnO and TiO2, exposed to the effect of nitrogen dioxide in the atmosphere of synthetic air changes their resistances relatively fast. This indicates that such structures might be practically applied in sensors of nitrogen dioxide ensuring a short time of response.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Thin cobalt oxide films for catalysis deposited by plasma-enhanced metal-organic chemical vapor deposition
Autorzy:: Tyczkowski, Jacek
Kapica, Ryszard
Łojewska, Joanna
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 7.

Tytuł:: Nanoporous anodic titania observed at the bottom side of the oxide layer
Autorzy:: Kapusta-Kołodziej, Joanna
Sulka, Grzegorz
Zaraska, Leszek
Opis:: The morphology and pore arrangement of nanoporous anodic TiO 2 arrays, prepared in the electrochemical cells with different sample alignments by the three-step self-organized anodic oxidation of titanium, were investigated at the bottom side of oxide layers. The quantitative analyses of pore spacing (cell size), pore density and pore arrangement were performed on the basis of FE-SEM bottom view images. The results show that the type of sample alignment and anodizing potential influence the pore spacing, pore density and pore arrangement. On the contrary, the anodizing temperature has a little effect on nanoporous anodic titanium dioxide (ATO) layers. Quantitative information on the nanopore arrangement, based on Delaunay triangulations, is also provided. The cells, which are not six-fold coordinated by neighboring cells, were recognized as defects and the percentage of defects, defined as a ratio between the number of defective pores and number of all pores on the analyzed surface was calculated for all the samples. A quite poor hexagonal arrangement with a relatively high percentage of defective pores (above 30%) was found for all studied anodizing conditions. However, the least percentage of defective pores suggesting the best nanopore arrangement was obtained for the potential of 60 V and 50 V at 10 ◦ C and 20 ◦ C, respectively.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 8.

Tytuł:: Application of scanning shear-force microscope for fabrication of nanostructures
Autorzy:: Sikora, A.
Gotszalk, T.
Sankowska, A.
Rangelow, I. W.
Tematy:: AFM
nanostructures fabrication
shear force microscopy; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/308832.pdf Link otwiera się w nowym oknie
Opis:: In view of the rapid growth of interest in AFM technique in surface property investigation and local surface modification we describe here an AFM microscope with optical tip oscillation detection. The modular shear-force/tunneling microscope for surface topography measurement and nanoanodisation is described. The measurement instrument presented here is based on the fiber Fabry-Perot interferometer for the measurement of the conductive microtip oscillation that is used as nano e-beam for local surface anodisation. An advantage of this system is that quantitative measurements of tip vibration amplitude are easily performed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Anodic growth of $TiO_2$ nanopore arrays at various temperatures
Autorzy:: Brzózka, Agnieszka
Sulka, Grzegorz
Kapusta-Kołodziej, Joanna
Jaskuła, Marian
Opis:: Nanoporous anodic titanium oxide (ATO) layers with different cell sizes, pore diameters and the thicknesses are successfully grown by three-step self-organized anodization in ethylene glycol containing 0.38 wt% of NH4F and 1.79 wt% of H2O at applied potential differences ranging from 30 V to 70 V at various electrolyte temperatures. A relatively high growth speed (about 40 μm h−1) of nanopore arrays is achieved at 30 °C under the potential difference of 70 V. The morphology and the structure of ATO layers are directly affected by anodizing conditions, especially temperature and potential difference. It was found that the oxide thickness and the cell size are linearly dependent on anodizing potential difference. On the other hand, the anodizing temperature in the range of 10–30 °C does not affect the cell size in ATO films. Analyses of the pore diameter, pore circularity and regularity of the pore arrangement suggests that nanoporous anodic titania with the best pore arrangement can be formed in a controlled manner by anodization performed at 50 V and 20 °C. Surprisingly, below and above this critical potential difference and temperature, pore diameters are smaller and obtained ATO structures are less regular. At higher anodizing temperatures, the regularity of pore arrangement observed at the surface and the pore diameter are considerably affected by the precipitated hydrous titanium dioxide.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 10.

Tytuł:: Nanoscale wear evolution on a polystyrene/poly (n-butyl methacrylate) blend
Autorzy:: Gnecco, Enrico
Ma, Chengfu
Khaksar, Hesam
Janiszewska, Natalia
Awsiuk, Kamil
Budkowski, Andrzej
Opis:: We have investigated the formation of surface nanostructures caused by early-stage wear of polystyrene (PS) and poly(n-butyl methacrylate) (PnBMA) thin films as pure materials, or mixed in the form of a 1:1 blend. To this end, atomic force microscopy (AFM) was used to repeatedly scratch the sample surfaces, measure the accompanying friction forces, and image the resulting features. In the very first stage ordered ripples are formed in all cases. As the process goes on, hillocks are nucleated on the crests of the ripples, and progressively released in the form of nanoplastics while the ripples become wider and less regular. On the blend surface the more compliant PnBMA presents more corrugated ripple structures and larger friction oscillations than PS in the beginning, but the scenario becomes again more complex as the wear test is repeated and the original ‘rim and hole’ geometry of the blend is disrupted. Quite noticeably, the wear damage is reduced if the surfaces are scraped forth and back and not only in one direction. The influence of the scan pattern (distance between scan lines) and of the normal force (well below and above the force threshold of about 50 nN leading to surface ripples in the first stage) have been also addressed.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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