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Wyświetlanie 1-15 z 77
Tytuł:
Applicability of equivalent diode models to modeling various thin-film photovoltaic (PV) modules in a wide range of temperature and irradiance conditions
Autorzy:
Prorok, M.
Werner, B.
Żdanowicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/378411.pdf
Data publikacji:
2006
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Elektronowej
Tematy:
thin-film photovoltaic
CuInGaSe2
Opis:
In the paper results of fitting of current-voltage (I-V) curves acquired in a wide range of irradiances and temperatures with use of equivalent either single (SEM) or double (DEM) diode model as applied to several commercial thin-film photovoltaic (PV) modules are presented. It is shown that like in case of crystalline silicon PV modules also for CIGS (CuInGaSe2) as well as CdTe thin-film modules both models may be reliably applied whereas in case a-Si (amorphous silicon), whether it is single or multi-junction structure, obtained results can not be accepted as being credible.
Źródło:
Electron Technology : Internet Journal; 2005-2006, 37/38, 6; 1-4
1897-2381
Pojawia się w:
Electron Technology : Internet Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of finite-size argon thin film coating single wall carbon nanotube
Autorzy:
Kośmider, M.
Dendzik, Z.
Żurek, S.
Górny, K.
Powiązania:
https://bibliotekanauki.pl/articles/1964139.pdf
Data publikacji:
2009
Wydawca:
Politechnika Gdańska
Tematy:
nanotube
molecular dynamics
cluster
thin film
Opis:
The structure and the dynamics of the argon thin film coating (15,4) and (12,12) carbon nanotubes have been studied in a series of molecular dynamic simulations. In the studied temperature regime, the argon atoms in the thin film were well localized. Structural changes and diffusion process inside the argon layers were not been observed. The influence of the chirality and the radius of the nanotube to the cluster properties is also reported.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2009, 13, 3; 187-197
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The optical parameters of TiO2 antireflection coating prepared by atomic layer deposition method for photovoltaic application
Autorzy:
Szindler, Marek
Szindler, Magdalena M.
Powiązania:
https://bibliotekanauki.pl/articles/1835965.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
thin film
atomic layer deposition
titanium dioxide
Opis:
Titanium dioxide thin films have been deposited on silicon wafers substrates by an atomic layer deposition (ALD) method. There optical parameters were investigated by spectroscopic ellipsometry and UV/VIS spectroscopy. A material with a refractive index of 2.41 was obtained. Additionally, in a wide spectral range it was possible to reduce the reflection from the silicon surface below 5%. The Raman spectroscopy method was used for structural characterization of anatase TiO2 thin films. Their uniformity and chemical composition are confirmed by a scanning electron microscope (SEM) energy dispersive spectrometer (EDS).
Źródło:
Optica Applicata; 2020, 50, 4; 663-670
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vitro hemocompatibility of thin films materials for direct blood contact
Autorzy:
Trembecka-Wójciga, K.
Major, R.
Lackner, J. M.
Plutecka, H.
Powiązania:
https://bibliotekanauki.pl/articles/285250.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hemocompatibility
thin film
protein adsorption
shear stresses
Opis:
When designing new biomaterials for tissue contact devices it is important to consider their architecture as it affects different cell response. Surface modification of tubular structures requires the use of different techniques than in the case of flat samples. Similarly, analytical techniques also need to be adapted to the specific shape of substrate. For blood contacting devices this issue is critical because of shear forces generated by fluid flow and responsible for blood components activation. This necessitates the use of diagnostic techniques dedicated for material analysis in dynamic conditions in order to simulate physiological conditions. In the frame of the work, the flat samples as well as tube like elements were considered. The flat samples were prepared for basic research. Based on the results of the basic research the thin coatings were selected for the internal side of the tube like elements which have been analysed in contact with blood using blood flow simulator. The cross section of the coating-substrate interaction was tested using transmission electron microscopy. The attachment of cells to coatings was determined by radial flow chamber. Hemocompatible analysis was carried out in two ways. The quality of the blood after the dynamic test was analysed using flow cytometry. In this case the aggregates formation, platelet consumption and apoptosis derived microparticles were considered. The amount of cells adhered to the materials surfaces was determined by confocal laser microscopy.
Źródło:
Engineering of Biomaterials; 2015, 18, 132; 2-8
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CdO thin films Grown by Chemical Spray Pyrolysis and Effect of Substrate type on its Optical Properties
Autorzy:
Abood, Mohmood Muwafaq
Jabbar, Wasmaa Abdulsattar
Daroysh, Hassan Hadi
Qader, Kameran Yasseen
Al-Baidhany, Ismaeel A.
Hussin, Hadi Ahmed
Jasim, Marwah Nasif
Powiązania:
https://bibliotekanauki.pl/articles/1194135.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CdO
Optical properties
Thin Film
energy gap
Opis:
Cadmium oxide (CdO) thin films were formed by chemical spray pyrolysis technique for different substrate type (glass, quartz, ITO). Absorption spectra were recorded from UV-Visible spectrophotometer in the range of 300-900 nm. The absorbance increased when the glass substrate replaced to quartz or ITO substrate, also this behavior for absorption coefficient and extinction coefficient. While the refractive index tack unstable behavior. The energy gap decreased from 2.4 eV for CdO thin film deposited on glass substrate to 2.36 eV for CdO thin film deposited on ITO substrate.
Źródło:
World Scientific News; 2016, 57; 41-47
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of atomic layer deposition technological parameters on optical properties and morphology of Al2O3 thin films
Autorzy:
Dobrzanski, L. A.
Szindler, M.
Hajduk, B.
Kotowicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/173801.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
thin film
aluminum oxide
atomic layer deposition
Opis:
This paper presents some results of investigations on aluminum oxide Al2O3 thin films prepared by the atomic layer deposition method on polished monocrystalline silicon. It has been described how the technological parameters of the deposition process, like the number of cycles and substrate temperature, influenced the optical properties and morphology of prepared thin films. Their physical and optical properties like thickness, uniformity and refractive index have been investigated with spectroscopic ellipsometry, atomic force microscopy and UV/vis optical spectroscopy.
Źródło:
Optica Applicata; 2015, 45, 4; 573-583
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring system for high speed wood machining processes
Autorzy:
Hoffmeister, H.-W.
Luig, M.
Wittmer, R.
Schuller, B.-C.
Strauss, H.
Biehl, S.
Powiązania:
https://bibliotekanauki.pl/articles/99458.pdf
Data publikacji:
2010
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
process monitoring
toolholder
piezoresistive thin film sensor
Opis:
The improvement of product quality as well as the increase of production efficiency is inevitable in modern manufacturing processes. In this regard an increased cutting speed causes dangerous process situations in respect to operator safety and machine damage. In addition to that wood working machines generally do not use process monitoring systems, e. g. tool breakage monitoring. The aim of this project was the development of a process monitoring system to increase safety in wood working processes. Therefore, the Institute of Machine Tools and Production Technology (IWF) and the Fraunhofer-Institute of Surface Engineering and Thin Films (FhG IST) developed a sensor-integrated tool holder, which is able to detect clamping forces and unbalances during the process. The hollow shank taper 'HSK-63-F' was chosen as tool holder as it is used in the majority of applications in wood working processes. The clamping and balance conditions are measured by an embedded piezo-resistive thin film sensor at the planar contact surface. To ensure a contact-free signal transmission a telemetric system was used. The interaction between this monitoring system and the machine control automatically activates an emergency stop. Hence, a system was developed which significantly increases the process safety during the run-up and the idle speed phase of the spindle.
Źródło:
Journal of Machine Engineering; 2010, 10, 2; 48-56
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of contact mixing with boundary and hydrodynamic fluid films considering boundary slippage
Analiza kontaktu mieszanego z uwzględnieniem poślizgu brzegowego w strefie hydrodynamicznego filmu
Autorzy:
Zhang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/280086.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
boundary film
nanometer-scale thin film
fluid film
boundary slippage
Opis:
An analysis is presented for a micro-contact where boundary and hydrodynamic fluid films simultaneously occur considering boundary slippage appearance at the upper contact surface in the boundary film area. The contact is one-dimensional, composed of two parallel plane surfaces, which are respectively rough rigid with rectangular projection in profile and ideally smooth rigid. In the outlet zone of the contact a boundary film occurs, and in the inlet zone of the contact a conventional hydrodynamic fluid film emerges. In the boundary film area, the film slips at the upper contact surface due to the limited shear stress capacity of the film-contact interface, while the film does not slip at the lower contact surface due to the shear stress capacity of the film-contact interface, which is large enough. In the boundary film area, the viscosity and density of the film are varied across the film thickness due to the film-contact interactions, and their effective values are used in modelling which depends on the boundary film thickness. In the fluid film area, the film does not slip at either of the contact surfaces.
Analiza zaprezentowana w pracy dotyczy zagadnienia mikro-kontaktu w strefie jednoczesnego występowania brzegowego i hydrodynamicznego filmu płynu z możliwością poślizgu w strefie brzegowej na górnej powierzchni kontaktu. Rozważany kontakt jest jednowymiarowy i odnosi się do dwóch równoległych płaskich powierzchni, z których jedna jest sztywna i szorstka w przekroju prostopadłym, a druga tak samo sztywna lecz idealnie gładka. W obszarze wyjścia ze strefy kontaktu pojawia się brzegowy film płynu, natomiast w strefie wejścia konwencjonalny film hydrodynamiczny. W strefie brzegowej film ulega poślizgowi na górnej powierzchni wskutek ograniczonej zdolności przenoszenia naprężeń stycznych pomiędzy płynem a ścianką, natomiast na powierzchni dolnej poślizg nie występuje. W strefie brzegowej filmu jego lepkość i gęstość zmienia się wzdłuż grubości wskutek interakcji płynu z powierzchnią. Efektywne wartości użyte w modelowaniu kontaktu zależą od grubości filmu brzegowego. W regularnej strefie film nie ulega poślizgowi na żadnej z omawianych powierzchni.
Źródło:
Journal of Theoretical and Applied Mechanics; 2010, 48, 1; 191-205
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time monitoring of cell cultures with nickel comb capacitors
Monitorowanie hodowli komórkowych w czasie rzeczywistym przy zastosowaniu niklowych kondensatorów grzebieniowych
Autorzy:
Kociubiński, Andrzej
Zarzeczny, Dawid
Szypulski, Maciej
Wilczyńska, Aleksandra
Pigoń, Dominika
Małecka-Massalska, Teresa
Prendecka, Monika
Powiązania:
https://bibliotekanauki.pl/articles/408219.pdf
Data publikacji:
2020
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
BioMEMS
ECIS
nickel
thin film
nikiel
cienka warstwa
Opis:
The aim of the study was to present a method for assessing the condition of cell culture by measuring the impedance of cells cultured in the presence of nickel. For this purpose, an impedance measurement technique using nickel comb capacitors was used. The capacitor electrodes were made using a thin film magnetron sputtering. In the experimental part, the culture of cells of mouse fibroblasts on the prepared substrate was performed. The cell culture lasted 43 hours and showed that the presented technique allows it to be used to analyze the effect of nickel on cells.
Celem pracy było przedstawienie metody oceny stanu hodowli komórkowej poprzez pomiar impedancji komórek hodowanych w obecności niklu. W tym celu zastosowano technikę pomiaru impedancji z wykorzystaniem niklowych kondensatorów grzebieniowych. Cienkowarstwowe elektrody kondensatora wykonano metodą rozpylania magnetronowego. W części eksperymentalnej przeprowadzono hodowlę komórek mysich fibroblastów na przygotowanym podłożu. Hodowla komórkowa trwała 43 godziny i wykazała, że przedstawiona technika mogłaby być zastosowana do analizy wpływu niklu na komórki.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2020, 10, 2; 32-35
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface roughness and residual stress evolution in SiNx/SiO2 multilayer coatings deposited by reactive pulsed magnetron sputtering
Autorzy:
Tien, Chuen-Lin
Lee, Po-Wei
Lin, Shih-Chin
Lin, Hong-Yi
Powiązania:
https://bibliotekanauki.pl/articles/1835787.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
thin film
residual stress
quarter-wave stack
surface roughness
Opis:
The surface roughness and residual stress behavior in two types of SiNx/SiO2 dielectric quarter-wave stacks was investigated experimentally. A reactive pulsed magnetron sputtering system was used to prepare the SiNx/SiO2 multilayer thin films. The results show that SiNx/SiO2 quarter-wave stack with a buffer layer of MgF2 thin film can reduce the residual stress. The effect of aging on the residual stress in two quarter-wave stacks was also studied. We found that the residual stresses in both SiNx/SiO2 multilayer coatings are changed from a compressive state to a tensile stress state with increasing the aging time. The root mean square (RMS) surface roughness of MgF2/(SiNx/SiO2)22 and (SiNx/SiO2)22 quarter-wave stacks are 2.23 ± 0.22 nm and 2.08 ± 0.20 nm, respectively.
Źródło:
Optica Applicata; 2021, 51, 2; 223-233
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
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:
RELEASE AND PERMEATION OF INDOMETHACIN FROM PHOSPHOLIPID COMPLEX FILM GENERATED FROM SPRAY FORMULATIONS
Autorzy:
Buatong, Wilaiporn
Nakpheng, Titpawan
Dechraksa, Janwit
Saisamuth, Sao-ake
Kongkhao, Wipatcha
Srichana, Teerapol
Powiązania:
https://bibliotekanauki.pl/articles/895442.pdf
Data publikacji:
2019-04-30
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
thin film
controlled release
indomethacin
Topical spray
phospholipid complex
Opis:
An indomethacin topical spray was prepared using lecithin and a cholesterol derivative as a phospholipid complex in a film. Polyvinylpyrrolidone (PVP) was used as a film-forming agent. Drug penetration through keratinocytes was evaluated as well as cytotoxicity to the keratinocytes and fibroblast cells. The results reveal that the PVP concentration provided fine droplets under a microscope with a low contact angle (12.07°-22.53°). Incorporating PVP in the formulation reduced the hydrodynamic radius or size by 20 times. The SEM and TEM results showed smoother surfaces of the thin film for larger quantities of the PVP film-forming agent in the formulations. It also gave the highest drug penetration when the PVP was 0.5%. However, the film-forming agent can also act as a control release barrier. The percent viabilities of the human keratinocytes and fibroblasts were higher in the indomethacin spray phospholipid complex thin film formulation than the pure drug.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 2; 329-339
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
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:
Characterization of ZnO:Al layers for applications in thin film solar cells
Autorzy:
Zdyb, A.
Krawczak, E.
Lichograj, P.
Powiązania:
https://bibliotekanauki.pl/articles/173619.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
transparent conductive oxide
magnetron sputtering
thin film solar cell
Opis:
Thin films of zinc oxide doped with aluminium were obtained by using the magnetron sputtering technique on glass substrates. The changes in magnetron power influence the structural, optical and electrical properties of the ZnO:Al layers. The deposited films are characterized by very good homogeneity and high optical transmission. Thicker films with larger agglomerates on the surface exhibit lower resistivity with the remaining good transparency.
Źródło:
Optica Applicata; 2016, 46, 2; 181-185
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation on the structural, optical and topographical behavior of Cadmium oxide polycrystalline thin films using electrochemical depositing method at different times
Autorzy:
Abd, Ahmed N.
Dawood, Mohammed O.
Hassoni, Majid H.
Hussein, Ali A.
Powiązania:
https://bibliotekanauki.pl/articles/1192094.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cadmium oxide
thin film
optical characteristics of film
electrochemical depositing method
Opis:
The optical and structure properties of Cadmium oxide (CdO) thin film prepared by electrochemical deposition method at different times (15, 30 and 60) min were investigated in this paper. Results of optical Transmission, absorption, reflection spectra, optical conductance, refractive index, extension coefficient, real and imaginary dielectric constants studies are reported. The optical transmittance of the CdO thin film which formed at room temperature was 20% at wavelength ≈350 nm then increases to 60% at wavelength ≈1100 nm for thin film of CdO. The band-gap was also calculated from the equation relating absorption coefficient with the wavelength. The energy band gap changes from 2.3eV (Bulk CdO) to 2.45eV (CdO thin film). The plotted graphs show the optical characteristics of the film which varied with the wavelength and the photon energy. The optical conductance and band-gap indicated that the film is transmitting within the visible range. The dielectric constant and optical conductance of the film initially decreases slowly with increase in photon energy. The extinction coefficient and refractive index of the films also evaluated, which affected with the change in transmittance. The structure of synthesised CdO thin film was analyzed by X-ray diffraction XRD which revealed that the CdO thin film are polycrystalline and have several peaks of cubic face structure. The crystallite size, dislocation density, microstrain and number of dislocations of the thin film were calculated and listed.
Źródło:
World Scientific News; 2016, 37; 249-264
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
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