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Tytuł:
The structure optimization of implants materials of the surface layers by sol-gel coating
Autorzy:
Donesz, A.
Krzak-Roś, J.
Kochanowska, I.
Będziński, R.
Powiązania:
https://bibliotekanauki.pl/articles/956590.pdf
Data publikacji:
2011
Wydawca:
Politechnika Śląska. Katedra Biomechatroniki
Tematy:
implant
warstwa wierzchnia
zol-żel
surface layer
sol-gel
Opis:
This work presents the synthesis of fluorine- and chlorine-doped silica thin films on stainless steel (316L) prepared by the sol–gel method. Obtained materials were examined: structurally (SEM, roughness measurements), mechanically (four-point bending test) and biologically (in vitro). The results of the tests show that it is a possibility to synthesis by sol-gel method stable, continuous and biocompatible coating for materials used for implants.
Źródło:
Aktualne Problemy Biomechaniki; 2011, 5; 25-28
1898-763X
Pojawia się w:
Aktualne Problemy Biomechaniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of Oxidation Resistance of Mild Steel by SiO₂-Al₂O₃ Sol Gel Coating
Autorzy:
Kirtay, S.
Powiązania:
https://bibliotekanauki.pl/articles/1402548.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Fw
81.65.Kn
Opis:
SiO₂-Al₂O₃ sol gel coating solution was used for coating of mild steel substrate by dip coating technique with withdrawing speeds of 250, 500, 750 and 1000 mm/min. The coatings were subsequently heat treated at 200°C for 1 hour in order to improve their corrosion resistance properties. The coating sol was synthesised using Glycidoxypropyltrimethoxysilane (C₉H₂₀O₅Si) and Aluminium triisopropylate (C₉H₂₁O₃Al). The corrosion resistance of the both coated and uncoated samples was evaluated by the Tafel polarization in NaCl solution. Fourier transformed infrared (FTIR) and energy dispersive spectroscopy (EDS) analyses were used to identify the presence of various functional groups in the coating solution. A comparison of the corrosion resistance of the coated and uncoated mild steel is presented. Variation of corrosion potential $(E_\text{corr})$ has increased and corrosion current density (i_{corr}) has decreased in the coated samples. i_{corr} values of coated specimens, heat treated at 200°C, were 12 to 14 times smaller than those of uncoated specimen. The measured electrochemical parameters indicate that the corrosion resistance was improved by the coating.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-90-B-92
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary evaluation of selected biologic properties of TiO2 and SiO2 layers on metallic substrates
Autorzy:
Urbański, W.
Dragan, S.
Gębarowska, E.
Dzięgiel, P.
Krzak-Roś, J.
Miller, M.
Pezowicz, C.
Będziński, R.
Powiązania:
https://bibliotekanauki.pl/articles/284506.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
sol-gel coating
fibroblast
cytotoxicity
orthopaedic implant
Opis:
Despite of applying modern biomaterials during constructing long term orthopaedic implants, in clinical practice there are still present wide range of complications, particularly concerning matter of implant - tissue interactions. Since interaction between implant and living tissue depends mainly on biomaterial surface features, we decided to modify orthopaedic alloys to improve their biological properties. The object of this experiment was in vitro evaluation of selected biological properties, particularly cytotoxicity of titanium alloy and 316L stainless steel substrates coated with SiO2 or TiO2 thin films. The coatings were synthesized by sol-gel method. Each samples was placed into mouse fibroblast culture. The cultures in presence of tested materials were maintained for three days. We found no distinct toxic effect of tested biomaterials. We noticed increase of fibroblast proliferation in cultures with uncoated titanium and particularly SiO2 coated titanium plates.
Źródło:
Engineering of Biomaterials; 2010, 13, no. 96-98; 129-133
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical and Mechanical Characterization of Zirconium Based Sol-Gel Coatings on Glass
Autorzy:
Sitarz, M.
Drajewicz, M.
Jadach, R.
Długoń, E.
Leśniak, M.
Reben, M.
Wajda, A.
Gawęda, M.
Burtan-Gwizdała, B.
Powiązania:
https://bibliotekanauki.pl/articles/352458.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sol-gel coating
zirconium oxide
ellipsometry
Vickers hardness
Opis:
The basic factor limiting the use of glasses is their unsatisfactory mechanical strength. The improvement of the mechanical strength of glasses is usually obtained by applying their respective thin surface layers. The object of the research was glass coated with zirconium oxide. For the application of zirconium oxide layer, dip-coating method was used. The resulting materials were subjected to detailed examination of the microstructure (SEM), and mechanical tests (Vickers hardness and modulus of elasticity). In order to evaluate the optical characteristics, the tests were performed by UV/VIS. The thickness of the overlying layers were determined using the method of ellipsometry. The study showed that the obtained sol-gel layer of zirconium oxide (IV) on glasses influence the improvement of the mechanical properties. It has been shown that the applied layers have high adhesion to the substrate.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 4; 1747-1752
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Pure and Doped TiO₂ Thin Films Prepared by Sol-Gel Spin-Coating Method
Autorzy:
Çiçek Bezir, N.
Evcin, A.
Kayali, R.
Özen, M.
Balyaci, G.
Powiązania:
https://bibliotekanauki.pl/articles/1031525.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.37.-d
68.55.-a
68.60.-p
78.20.-e
81.10.Dn
71.20.Be
Opis:
In this study, using spin-coating sol-gel method we fabricated TiO₂ thin films, doped with different concentrations (1, 2, and 3 mole %) of Ce, Dy, and Eu. Characterization of the prepared samples was performed by means of the X-ray diffraction, scanning electron microscopy, ultraviolet visible absorption, and differential thermal and thermo gravimetric analysis. X-ray diffraction measurements have shown that in Eu and Dy-doped samples crystal structure consists of mixed rutile and the dominant anatase phases, however the Ce doped samples consist of anatase phase only. Scanning electron microscopy images have revealed that while average thin film thickness of the Dy-doped samples decreases with increasing concentration of Dy, the average film thicknesses of samples doped with Ce and Eu increases with increasing concentrations of these dopants. Ultraviolet visible absorption spectroscopy measurements have shown that while absorbances of the samples doped by 1 and 2 mole % of the dopants have nearly similar properties, these properties differ from each other for 3 mole % of the dopants. Finally, differential thermal and thermo gravimetric analyses have shown that the chemical reactions and weight losses of the samples have occurred at the expected temperatures.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 620-624
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of ZnO thin film using sol-gel dip-coating technique and their characterization for optoelectronic applications
Autorzy:
Chaudhary, Preeti
Kumar, Vipin
Powiązania:
https://bibliotekanauki.pl/articles/1075562.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Band gap
SEM
XRD
ZnO
dip coating
Opis:
ZnO thin film with an aim to employ in opto-electronic applications was prepared using sol-gel dip-coating route and thereafter sintered at temperature 500 ºC. The film has been investigated by XRD pattern, SEM, UV-Vis and photoluminescence spectroscopy for physical and optical characterization of ZnO thin film. X-Ray diffraction pattern analysis reveals the polycrystalline nature with hexagonal wurtzite structure having orientation along the plane (002). Scanning electron micrograph shows symmetrical dense ZnO rod throughout the surface. The diffuse reflectance spectrum is studied in the range of wavelength 300-800 nm. A band gap of 3.21 eV is calculated using Kubelka-Munk function. PL spectrum shows strong peak at 380 nm due to oxygen vacancy of ZnO.
Źródło:
World Scientific News; 2019, 121; 59-66
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and Optical Properties of Sol-Gel Derived Dip-Coated CdO Thin Film
Autorzy:
Kumari, Renu
Kumar, Vipin
Powiązania:
https://bibliotekanauki.pl/articles/1159724.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Band gap
CdO
Sol-gel dip coating
Thin film
Opis:
In this paper CdO thin film has been prepared by sol-gel dip-coating method on glass substrate. The film was characterized by X-Ray diffraction, UV-Visible spectroscopy and photoluminescence spectroscopy for structural and optical properties of CdO thin film. The XRD pattern shows that film is polycrystalline in nature and has a cubical structure with orientation along (111) plane. The diffuse reflectance spectra for the film is studied in wavelength range 400-800 nm. The direct energy band gap of 2.50 eV is found for the film using modified Kubelka-Munk function. Photoluminescence spectra shows one sharp peak at 540 nm due to oxygen vacancy of cadmium oxide.
Źródło:
World Scientific News; 2018, 113; 210-217
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości antykorozyjne powłoki TiO2 otrzymywanej metodą zol-żel w zależności od pH środowiska i obecności białka osocza krwi
Anticorrosion properties of TiO2 sol-gel coating in relation to pH of solution and presence of serum protein
Autorzy:
Burnat, B.
Błaszczyk, T.
Leniart, A.
Powiązania:
https://bibliotekanauki.pl/articles/283972.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomateriały
TiO2
zol-żel
białko
korozja
metody elektrochemiczne
biomaterials
sol-gel
protein
corrosion
electrochemical methods
Opis:
Zbadano wpływ pH środowiska i obecności białka osocza krwi na właściwości antykorozyjne powłoki ditlenku tytanu TiO2. Powłokę TiO2 o strukturze amorficznej z krystalitami anatazu otrzymywano metodą zol-żel na powierzchni stopu biomedycznego M30NW. Badania korozyjne z wykorzystaniem metod elektrochemicznych przeprowadzono w temperaturze 37°C w roztworze 0.9 % NaCl (sól fizjologiczna) o pH 4.5 oraz 7.4. Wartości pH wybrane do badań pozwoliły przybliżyć 51 warunki naturalnie występujące w środowisku tkankowym (pH=7.4) oraz warunki stanu zapalnego, który może pojawić się w organizmie (pH=4.5). Aby jeszcze lepiej odwzorować środowisko tkankowe, do roztworu soli fizjologicznej dodano albuminę - białko występujące w osoczu krwi w największej ilości. Właściwości antykorozyjne powłoki TiO2 określono w oparciu o wyznaczone wartości potencjału korozyjnego Ecor, oporu polaryzacyjnego Rp, szybkości korozji CR, gęstości prądu w obszarze pasywnym i0.5 oraz potencjałów przebicia Eb i repasywacji Erep. Stwierdzono, że modyfikacja powierzchni stopu M30NW powłoką TiO2 powoduje zwiększenie odporności korozyjnej badanego stopu w roztworach NaCl o pH równym 4.5 i 7.4 - antykorozyjne działanie powłoki TiO2 widoczne jest zarówno w potencjale korozyjnym jak i przy polaryzacji anodowej. Dodatek albuminy ma niejednoznaczny wpływ na antykorozyjne właściwości powłoki TiO2 w potencjale korozyjnym. Natomiast przy polaryzacji anodowej wpływ białka zaznacza się jedynie w roztworze NaCl o pH 4.5 - albumina powoduje istotne zwiększenie potencjału przebicia dla stopu z powłoką TiO2.
In this study we investigated the influence of solution pH and serum protein on the anticorrosion properties of titanium dioxide TiO2 coating. This TiO2 coating with amorphous structure containing crystallites of anatase was obtained by the solgel method on the surface of M30NW biomedical alloy. Corrosion measurements using electrochemical methods were carried out in 0.9 % NaCl (physiological saline) solution at pH of 4.5 and 7.4. The pH values selected for the tests simulate both natural body conditions (pH=7.4) and inflammatory conditions which may occur in the body (pH=4.5). Much better simulation of tissue environment was achieved by adding of albumin – protein found in blood plasma in the greatest amount. Anticorrosion properties of TiO2 coating were determined on the basis of corrosion potential Ecor, polarization resistance Rp, corrosion rate CR, current density in the passive range i0.5 and also breakdown Eb and repasssivation potentials Erep. It was stated that modification of M30NW alloy surface by TiO2 coating cause increase in corrosion resistance of the investigated alloy in NaCl solutions both at pH of 4.5 and 7.4 - anticorrosive effect of TiO2 coating is evident both at corrosion potential and during the anodic polarization. The addition of albumin has an ambiguous effect on the anticorrosion properties of the TiO2 coating at the corrosion potential. Whereas during the anodic polarization the protein effect is visible only in NaCl solution at pH of 4.5 – albumin causes significant increase in the breakdown potential of the alloy coated by TiO2.
Źródło:
Engineering of Biomaterials; 2013, 16, no. 122-123 spec. iss.; 50-55
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Cd Doping on Structural and Some Optical Studies of Nano CuO Films Prepared by Sol–Gel Technique
Autorzy:
Kadhim, Raheem G.
Ban, Raheem Saleh Kzar
Powiązania:
https://bibliotekanauki.pl/articles/1182823.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cd
CuO
Sol–Gel Spin Coating Technique
Thin Film
Opis:
This research deals with the study of the structural and optical properties of CuO and Cd doped CuO nano films in thickness 100nm were deposited on a glass substrate using sol-gel spin coating technique. XRD results indicated that the films are polycrystalline and have monoclinic structure with a preferred orientation along ((111).) ̅ and the grain size increase with increasing concentration Cd. Data of AFM indicate that the surface of films is smooth. From SEM image observed the particles are smallest an even particle distribution on a smooth surface. The optical transition in the CuO and (Cd– doped CuO) thin films are observed to be allowed direct transition. The value of the optical energy gap decreases with increasing of (Cd) for all samples.
Źródło:
World Scientific News; 2017, 64; 69-83
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Ceramic Coating on Mechanical Properties of Stainless Steel
Autorzy:
Czekaj, D.
Lisińska-Czekaj, A.
Krzysztofowicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/353220.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stainless steel
X-ray analysis
microhardness
sol-gel ceramic coating
Opis:
Crystal structure and phase composition of stainless steel substrates (AISI 304 type) was studied and it was found that they adopted the cubic symmetry. The calculated elementary cell parameter for the mayor Fe-Ni phase (weight fraction 99%) was a = 3.593 Å, whereas the mean grain size was = 2932 Å. Morphology of the stainless steel substrate surface was studied with profilometry. Mechanical properties of the stainless steel substrates and stainless steel substrates coated with ceramic layer of barium strontium titanate were studied with microhardness tester. For measurements performed according to the Vickers method the average microhardness was found HV = 189 or HV = 186 for the “in-line” and “mapping” measurement pattern, respectively. The sol-gel method was used to coat the surface of the stainless steel substrate with a thin ceramic layer of the chemical composition Ba0.6 Sr0.4 TiO3 . It was found that the stainless steel substrate covered with sol-gel deposited ceramic coating exhibited the average hardness within the range HV = 217 up to HV = 235 for loading force F = 98 mN and F = 0.98 N, respectively. The Knopp method was also used and it was found that the stainless steel substrate with Ba0.6 Sr0.4 TiO3 coating exhibited hardness HK = 386.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 911-916
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural, morphological and photoluminescent properties of annealed ZnO thin layers obtained by the rapid sol-gel spin-coating method
Autorzy:
Sypniewska, Małgorzata
Szczesny, Robert
Popielarski, Paweł
Strzałkowski, Karol
Derkowska-Zielinska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/1818231.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
FTIR and Raman spectroscopies
photoluminescence
SEM
XRD
ZnO thin films
Opis:
ZnO thin layers were deposited on p-type silicon substrates by the sol-gel spin-coating method and, then, annealed at various temperatures in the range of 573-873 K. Photoluminescence was carried out in the temperature range of 20-300 K. All samples showed two dominant peaks that have UV emissions from 300 nm to 400 nm and visible emissions from 400 nm to 800 nm. Influence of temperature on morphology and chemical composition of fabricated thin layers was examined by XRD, SEM, FTIR, and Raman spectroscopy. These measurements indicate that ZnO structure is obtained for samples annealed at temperatures above 573 K. It means that below this temperature, the obtained thin films are not pure zinc oxide. Thus, annealing temperature significantly affected crystallinity of the thin films.
Źródło:
Opto-Electronics Review; 2020, 28, 4; 182--190
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural, morphological and photoluminescent properties of annealed ZnO thin layers obtained by the rapid sol-gel spin-coating method
Autorzy:
Sypniewska, Małgorzata
Szczesny, Robert
Popielarski, Paweł
Strzalkowski, Karol
Derkowska-Zielinska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/1818237.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
FTIR and Raman spectroscopies
photoluminescence
SEM
XRD
ZnO thin films
Opis:
ZnO thin layers were deposited on p-type silicon substrates by the sol-gel spin-coating method and, then, annealed at various temperatures in the range of 573-873 K. Photoluminescence was carried out in the temperature range of 20-300 K. All samples showed two dominant peaks that have UV emissions from 300 nm to 400 nm and visible emissions from 400 nm to 800 nm. Influence of temperature on morphology and chemical composition of fabricated thin layers was examined by XRD, SEM, FTIR, and Raman spectroscopy. These measurements indicate that ZnO structure is obtained for samples annealed at temperatures above 573 K. It means that below this temperature, the obtained thin films are not pure zinc oxide. Thus, annealing temperature significantly affected crystallinity of the thin films.
Źródło:
Opto-Electronics Review; 2020, 28, 4; 182--190
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Preheating Temperature on Microstructure and Optical Properties of ZnO Thin Films Prepared by Sol-Gel Spin Coating Technique
Autorzy:
Ji, Qiang-min
Wang, Ya-li
Gao, Xiao-yong
Gao, Hui
Zhai, Yao-fei
Powiązania:
https://bibliotekanauki.pl/articles/1398971.pdf
Data publikacji:
2016-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Et
78.55.-m
Opis:
Highly-oriented ZnO thin films prepared by using low-cost technique such as sol-gel technique are of much importance to ZnO-based white light-emitting diodes. The chose of proper preheating temperature in sol-gel technique is still critical for highly-oriented ZnO thin film so far. The mechanisms for the preheating in the formation of ZnO thin film and for the reactions involved in the sol solution have not been clearly stated yet. Thus, in this work, the highly-oriented ZnO thin films were prepared on glass substrates by using sol-gel spin-coating technique. The sol solution was prepared by using the two-step method rather than usual one-step method, which facilitates the understanding of the mechanism for the reactions involved in the sol solution. The effect of the preheating temperature on the microstructure and the optical properties of the films were in particular investigated. The mechanisms for the preheating in the formation of the films and for the reactions involved in the sol solution prepared by the two-step method were also proposed in terms of the experimental results. The preheating not only enhances the volatilization of the solvent 2-methoxyethanol and the decomposition of the residual organic species, but also results into the formation of small number of ZnO particles. The preheating temperature of 300°C is most favorable for the highly-oriented ZnO thin film. Increasing the preheating temperature results into the blue shift of the absorption edges of the films. This can be explained by using the quantum-size effect. The photoluminescence spectra of the films show an UV emission at the near-band edge and a broad green-yellow emission at 470-620 nm. The former is closely related to the excitons, while the latter is to the intrinsic defect species in the film.
Źródło:
Acta Physica Polonica A; 2016, 129, 6; 1191-1196
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Five-Layered ZrO₂ and Single-Layered Ce, Eu, and Dy-Doped ZrO₂ Thin Films Prepared by Sol-Gel Spin Coating Method
Autorzy:
Çiçek Bezir, N.
Evcin, A.
Kayali, R.
Özen, M.
Esen, K.
Powiązania:
https://bibliotekanauki.pl/articles/1031178.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.37.-d
68.55-a
68.60-p
78.20.-e
81.10.Dn
71.20.Be
Opis:
In order to investigate the influence of the number of layers on the properties of ZrO₂ thin films, we prepared one pure ZrO₂ film sample with five layers and Ce, Eu, and Dy-doped ZrO₂ samples with single layer, by spin-coating sol gel-method. The crystal structures of thin films were determined using X-ray diffraction, morphology of the samples was analyzed by scanning electron microscopy, and the optical properties of the samples were determined by ultraviolet/visible absorbance measurements. The results of these measurements have shown that the concentration of the dopants and the thickness of thin film layers play a vital role in the physical, chemical, and optical properties of the pure and doped ZrO₂ thin films.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 612-616
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of transparent polysiloxane coatings on a glass support via the sol-gel dip coating technique and the effect of their hydrophobization with hexamethyldisilazane
Autorzy:
Chodkowski, Michał
Terpiłowski, Konrad
Pasieczna-Patkowska, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/1450109.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
silica
coating
hydrophobization
wettability
HMDS
bubbler
Opis:
This study aimed at synthesis, preparation, and physicochemical properties investigation of undoped polysiloxane-based coatings deposited on the glass supports. The other goal was to test the effectiveness of their hydrophobization with hexamethyldisilazane at an elevated temperature using a bubbler. The coatings were obtained in a sol-gel process by acid-assisted hydrolysis of tetraethoxysilane and they were applied to the glass supports using the dip coating technique with various withdrawal speeds. The synthesized composition was scanned using TurbiscanLAB and its particle size was determined by means of the dynamic light scattering technique. The obtained surfaces were examined based on the water wettability measurements, photoacoustic spectroscopy, and transmittance measurements. It was found that the stability of the sol did not change during the dip-coating. Smooth, homogeneous, uniform, hydrophobic, and transparent coatings on the glass supports were obtained. Their wettability was determined by the contact angle in the range from 83.5 to 95.2 degrees and very low contact angle hysteresis. The hydrophobic effect obtained by modification with hexamethyldisilazane appears to be permanent – the contact angles do not change significantly after 7 days. The synthesized sol composition appears to be a good starting point for its chemical and physical modification for hydrophobicity increase and surface properties modification. Moreover, the hydrophobization of the coatings with hexamethyldisilazane at an elevated temperature using the bubbler did not have the desired effect.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 76-88
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of fluorine and tungsten co-doping on optical, electrical and structural properties of tin (IV) oxide thin films prepared by sol–gel spin coating method
Autorzy:
Keskenler, E F
Turgut, G
Aydin, S.
Dogan, S
Duzgun, B
Powiązania:
https://bibliotekanauki.pl/articles/175016.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
tin (IV) oxide (SnO2)
fluorine (F) and tungsten (W) co-doping
sol-gel
Opis:
Fluorine and tungsten co-doped tin (IV) oxide (WFTO) thin films have been prepared first time by a sol–gel spin coating method. The effect of F and W co-dopant ratio on optical, electrical and structural properties of SnO2 was investigated. It was found that the optical properties of the films were obviously affected by the co-dopant ratio. When the F:W co-dopant ratio increases from 0.25:0.25 to 0.75:0.50, the transmittance in the short wavelengths slightly increases and transmittance edge shifts towards shorter wavelength. With an increase in the co-dopant ratio, the reduction and red shifts in the optical transmittance edge are very obvious at all wavelengths. Transmittance values at 550 nm for the films have varied between 79.64% and 50.20%. The indirect and direct band gap values for WFTO-1, WFTO-2, WFTO-3 and WFTO-4 samples were calculated to be 3.73, 3.79, 3.48, 3.40 eV and 4.03, 4.04, 3.98, 3.97 eV, respectively. The crystal structure of the films has been investigated by X-ray diffraction patterns. It has been observed that WFTO-1 and WFTO-2 samples have (111) preferential orientation corresponding to SnO2 cubic phase. This orientation almost disappears and changes to tetragonal phase (110) orientation for WFTO-3 and WFTO-4. To the best of our knowledge, this is the first cubic structure observation for SnO2 grown by the sol–gel technique. The electrical properties were also changed with co-doping ratio. The best optical, electrical and structural properties were obtained for mole ratio 0.75:0.50 (F:W).
Źródło:
Optica Applicata; 2013, 43, 4; 663-677
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of calcination temperature on optical and structural properties of TiO2 thin films prepared by means of sol-gel and spin coating
Autorzy:
Tański, T.
Matysiak, W.
Kosmalska, D.
Lubos, A.
Powiązania:
https://bibliotekanauki.pl/articles/201456.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
TiO2 thin films
spin coating
optical properties
structural properties
calcination
sol-gel
titanium dioxide
Cienkie warstwy TiO2
właściwości optyczne
właściwości strukturalne
kalcynacja
zol-żel
dwutlenek tytanu
Opis:
In this study, ceramic TiO2 thin films were prepared on glass substrates using sol-gel and spin-coating methods from the TNBT/ AcOH/ EtOH/ H2O solution. The obtained coatings were subjected to drying at room temperature and were then calcined in the air at different temperatures in a range of 400–600°C in order to obtain clean TiO2   layers. The surface morphology and chemical composition were characterized with the use of a scanning electron microscope (SEM) and an energy dispersive spectrometer (EDX). Research has shown the presence of elements in the TiO2   and the influence of temperatures on layer thickness. Analysis of optical properties and energy gap width of the prepared coatings was determined by means of spectra analysis of absorbance as a function of radiation energy obtained with the use of the UV-VIS spectrophotometer. The obtained spectra of the layers are characterized by a shift of absorption lines towards the visible light wavelengths and the obtained values of band gaps decrease as the calcination temperature rises. The obtained and developed results of TiO2   thin films testify to the wide application possibilities of the layers in elements which use photocatalytic processes such as self-cleaning surfaces, solar cells, pollution removing membranes and optoelectronic components.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 2; 151-156
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural and Optical Properties of CuO Doped (Li) Thin Films Prepared by Sol-Gel Technique
Autorzy:
Kadhim, Raheem G.
Kzar, Kzar
Powiązania:
https://bibliotekanauki.pl/articles/1188084.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CuO
Li
Sol-gel
spin coating
x-ray diffraction
UV- Visible
Opis:
CuO and (Li–doped CuO) thin films have been prepared on glass substrates by sol-gel method using spin coating technique. X-ray diffraction (XRD) results reveal that the deposited CuO and (Li– doped CuO) thin films monoclinic crystal structure and the grain size increase with increasing concentration Li. The optical transition in the CuO and (Li– doped CuO) thin films are observed to be allowed direct transition. The value of the optical energy gap decreases with increasing of (Li) for all samples.
Źródło:
World Scientific News; 2016, 56; 56-66
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of GZO/IZO Dual-Layer as an Electron Transport Layer in Dye-Sensitized Solar Cell
Autorzy:
Manzari Tavakoli, M. H.
Ahmadi, M.
Sabet, M.
Powiązania:
https://bibliotekanauki.pl/articles/353232.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual-layer
sol-gel
spin coating
thin film
GIZO
solar cell
Opis:
GZO/IZO semiconductor thin films were prepared on the ITO substrate via sol-gel spin coating method for using in the dye-sensitized solar cells (DSSCs). For this purpose, GZO and IZO thin films were optimized by the percentage of doping gallium and indium in zinc oxide and were studied their electrical, optical and structural properties. After that, the layers with the best performance were selected for use in the DSSCs. The concentration of all solutions for spin coating processes was 0.1 M and zinc oxide has been doped with gallium and indium, with different doping percentages (0, 0.5, 1, 2 and 4 volume percentage). So, by studying the properties of the fabricated thin films, it was found the films with 0.5%GZO and 0.5%IZO have the best performance and hence, the optimized dual-layer (0.5% GZO/0.5% IZO (GIZO)) were prepared and studied their electrical and optical properties. The synthesized optimized dual-layer film was successfully used as the working electrode for dye-sensitized solar cells. The sample with 0.5%IZO shows the 9.1 mA/cm2 short-circuit current density, 0.52 V open circuit voltage, 63% fill factor and 2.98% efficiency.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1609-1614
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical resistance of SiO2 layers obtained by the sol–gel technique on a glass substrate
Autorzy:
Nocuń, M
Środa, M
Ciecińska, M
Powiązania:
https://bibliotekanauki.pl/articles/173238.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sol-gel
antireflection coating
sintering parameters
Opis:
The paper analyses the influence of heat treatment parameters on SiO2 coatings obtained by the sol–gel technique. Their adhesion to the glass substrate and corrosion resistance were studied. The changes in thickness and porosity with the firing temperature and time of sintering for the systems of 1, 2 and 3 layers in case of SiO2 layers were studied. It was shown that the sufficient durability of the SiO2 coating on the glass substrate can be achieved only by the appropriate selection of thermal treatment parameters. The results confirmed that higher sintering temperature is required for multilayer systems, as compared with a one-layer system.
Źródło:
Optica Applicata; 2015, 45, 1; 125-134
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie grubości warstw materiału uzyskanego podczas przejścia zol-żel (metodą dip-coating) na podłożach wyciąganych z wodnych roztworów spoiw koloidalnych
Comparison of layer thickness on materials produced by sol-gel transition on substrates removed from aqueous solutions of colloidal binders
Autorzy:
Wawrylak, M.
Leśniewski, W.
Szczepaniak-Lalewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/391490.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
przejście zol-żel
spoiwa koloidalne
odlewnicze formy ceramiczne
pomiary grawimetryczne
dip-coating
sol-gel transition
colloidal binders
casting ceramic moulds
gravimetric measurement
dip coating
Opis:
W artykule zaprezentowano metodę badania przejścia zol-żel, w której płytki odpowiedniego podłoża są wyciągane z wodnego spoiwa koloidalnego ze stałą prędkością. Grubość naniesionej warstwy jest związana z wielkością cząstek występujących w spoiwie. Przydatność technologiczna spoiw koloidalnych ograniczona agregacją cząstek jest trudna do oceny bez dostępu do specjalistycznych urządzeń pomiarowych. Opracowanie prostej metody umożliwiającej szybką ocenę parametrów użytkowych spoiwa koloidalnego może znaleźć zastosowanie w praktyce przemysłowej.
This paper presents the method of investigating the sol-gel transition by constant speed removal of plates, made of suitable substrate, from an aqueous colloidal binder. The thickness of the deposited colloidal binder layer depends on the particle sizes in the binder. The processing feasibility of colloidal binders reduced by aggregation of particles is difficult to evaluate without access to special measuring equipment. Development of a simple method for prompt evaluation of performance parameters in colloidal binders may have industrial applications.
Źródło:
Prace Instytutu Odlewnictwa; 2014, T. 54, nr 4, 4; 43-50
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ceramic nanomaterials based on the barium and titanium compounds, prepared by the sol - gel method, for elecrotechnical applications
Nanomateriały ceramiczne na bazie związków tytanu i baru przygotowane za pomocą metody zol-żel do zastosowań w elektrotechnice
Autorzy:
Kogut, K.
Zboromirska-Wnukiewicz, B.
Kasprzyk, K.
Powiązania:
https://bibliotekanauki.pl/articles/352906.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
związki tytanu
związki baru
zanurzanie
przenikalność elektryczna
zol-żel
barium titanate
dip coating
electric permittivity
sol-gel
spin coating
Opis:
This paper describes the sol - gel method barium and titanium compounds materials obtaining, which their physicochemical parameters could be competitive with the materials obtained by classic methods. Additionally dielectric thin layers was obtained with the use of spin and dip coaters. Based on selected precursor elements which form appropriate crystal net, the capacitance construction was created. Dielectric in this contraction was a barium titanate with high electrical permittivity and small grain size. The optimal dry, calcinations and sintering temperature of the dielectric with base was determined. On that capacitor the microscopic analysis with the use of scanning electron microscope (SEM) was carried out. The thickness of the dielectric layer and electrical parameters use by impedance analyzer Solatron SI 1260 was carried out. The capacitance, dielectric loss and electrical permittivity was carried out, cooperative influence of the frequency and temperature on the measurements was determined. The best results had a samples sintered in the 1000°C. The electrical permittivity for measurements in few Hertz for the samples with the base of nickel and BaTiO3 layer coated by spin and dip coaters, in the room temperature and measurements for few Hertz, amount to 4700. The electrical capacity for low frequency was about 3,2ź10-8F.
W pracy przedstawiono metode zol – żel otrzymywania materiałów na bazie związków tytanu i baru, których właściwości fizykochemiczne mogą być konkurencyjne dla materiałów uzyskiwanych metodami klasycznymi. Dodatkowo wykorzystując urządzenia typu spin i dip coater uzyskano cienkie warstwy dielektryczne. Na podstawie wytypowanych prekursorów pierwiastków tworzących odpowiednia sieć krystaliczna, wykonano układ pojemnosciowy, w którym dielektryk stanowił tytanian baru o wysokiej wartości przenikalności elektrycznej i niewielkich rozmiarach ziaren. Wyznaczono optymalna temperature suszenia, kalcynacji i wypalania dielektryku wraz z podłożem. Na przygotowanym elemencie stanowiącym rodzaj kondensatora wykonano analize mikroskopowa za pomocą elektronowego mikroskopu skaningowego oraz przeprowadzono pomiary grubości nałożonych warstw jak i pomiary właściwości elektrycznych wykorzystując analizator impedancji Solatron SI 1260. Wyznaczono pojemność elektryczną, współczynnik strat dielektrycznych, przenikalność elektryczną materiału, określając jednocześnie wpływ częstotliwości i temperatury na wyniki pomiaru. Stwierdzono, że najlepszymi wynikami charakteryzowały się próbki wypalane w temperaturze 1000 C. Wartość przenikalności przy częstotliwości pojedynczych herców dla próbek o podłożu ze stali kwasoodpornej z cienką warstwą BaTiO3 wypalanych w 1000 C, przy temperaturze pomiarowej 40-50 C, wynosiła ok. 300 zaś w podwyższonych temperaturach pomiaru przenikalność osiągała wartość rzędu 14000. Dla próbek gdzie podłoże stanowił nikiel a warstwa BaTiO3 nakładana była za pomocą metod spin coatingu i powolnego zanurzania, już w temperaturze pokojowej przy pojedynczych hercach zmierzona wartość przenikalności elektrycznej osiągała wartości rzędu 4700. Pojemność elektryczna przy pomiarze dla niskich częstotliwości osiągała wartości rzędu 3,2x10-8F.
Źródło:
Archives of Metallurgy and Materials; 2011, 56, 4; 1057-1057
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ chropowatości podłoża na topografię warstw TiO2 i SiO2 nakładanych metodą zol-żel
Influence of substrate roughness on TiO2 and SiO2 coating topography coated by funcional sol-gel derived layers
Autorzy:
Będziński, R.
Filipiak, J.
Pezowicz, C.
Krzak-Roś, J.
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/285966.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
implanty
ortopedia
metoda zol-żel
implants
orthopaedics
sol-gel method
Źródło:
Engineering of Biomaterials; 2008, 11, no. 81-84; 87-89
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of the Properties of Ti6Al7Nb Titanium Alloy in Terms of the Type of Surface Modification
Autorzy:
Woźniak, A.
Bialas, O.
Adamiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/353294.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
titanium alloys
sol-gel method
ZrO2 coating
EIS
AFM
Opis:
The paper presents the influence of ZrO2 coating on Ti6Al7Nb titanium alloy depending on the method of deposition. The coatings were made by sol-gel method and atomic layer deposition (ALD). Wettability tests, pitting corrosion assessment and electrochemical impedance spectroscopy (EIS) were carried out in the paper. Complementary macro- and microscopic observations, roughness analysis by profilometric method and atomic force microscopy (AFM) were made. Based on the results obtained, it can be concluded that the type of method of depositing the layer on the surface of the material has a significant influence on its properties and that it should be taken into account during the process of the material improvement. Drawing on the findings presented, it can be inferred that roughness has a significant impact upon the surface wetttability of the tested surfaces and their related corrosion resistance. The obtainment of hydrophobic surfaces is for smaller rougidity values.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 735-741
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cost-effective titania layers over 100 nm thick : effect of annealing on the structural, morphological, and optical properties
Autorzy:
Zięba, Magdalena
Tyszkiewicz, Cuma
Gondek, Ewa
Wojtasik, Katarzyna
Nizioł, Jacek
Dorosz, Dominik
Starzyk, Bartłomiej
Szymczak, Patryk
Pakieła, Wojciech
Rogoziński, Roman
Karasiński, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/27315694.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
sol-gel
titania layer
dip-coating
surface roughness
optical properties
Opis:
Titania dioxide (TiO₂) layers were synthesized via the acid-catalysed sol-gel route using titania (IV) ethoxide, and then annealed at temperatures varying in the range of 150-700 °C. The research concerned the effect of annealing temperature on the structure of TiO₂ layers, their surface morphology, and their optical properties. Further, X-ray diffractometry, and Raman spectroscopy were used to determine the structure of TiO₂ layers. Scanning electron and atomic force microscopy were used to study the surface morphology of TiO₂ layers. Transmittance, reflectance, absorption edge, and optical homogeneity were investigated by UV-VIS spectrophotometry, while the refractive index and thicknesses of TiO₂ layers were measured using a monochromatic ellipsometer. Chromatic dispersion characteristics of the complex refractive index were determined using spectroscopic ellipsometry. Structural studies have shown that the TiO₂ layers annealed at temperatures up to 300 °C are amorphous, while those annealed at temperatures exceeding 300 °C are polycrystalline containing only anatase nanocrystals with sizes increasing from 6 to 20 nm with the increase of the annealing temperature. Investigations on the surface morphology of TiO₂ layers have shown that the surface roughness increases with the increase in annealing temperature. Spectrophotometric investigations have shown that TiO₂ layers are homogeneous and the width of the indirect optical band gap varies with annealing temperature from 3.53 eV to 3.73 eV.
Źródło:
Opto-Electronics Review; 2023, 31, 4; art. no. e147913
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
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