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1
Content available The impact of atomic layer deposition technological parameters on optical properties and morphology of Al2O3 thin films
Dobrzanski L. A., Szindler M., Szindler M., Hajduk B., Kotowicz S.
Optica Applicata
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2015
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Vol. 45, nr 4
573--583
EN
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.
2
Content available remote IR and microscopic studies of polyurethane surface in the Polish extracorporeal ventricular assist device POLVAD-MEV
Kościelniak-Ziemniak M., Hajduk B., Jarka P., Weszka J., Kustosz R., Kapis A., Gonsior M.
Archives of Materials Science and Engineering
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2014
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Vol. 68, nr 1
10--19
EN
Purpose: The aim of this article is to show results of IR measurements and microscopic analysis performed on layers prepared with dissolved VAD fragments and pieces of ventricular assist devices cut out of from determined VAD sectors. Design/methodology/approach: The objects of the study have been POLVAD-MEV VADs from POLCAS system. Four ventricular assist devices POLVAD-MEV have been investigated with use M80 SPECORD IR spectrophotometer and high sensitivity Zeiss – 5 Exciter Confocal Laser Scanning Microscope equipped with a CCD camera. Findings: The carried IR and microscopic studies showed changes of VAD inner surface. All VAD polyurethane fragments had lower or higher degree of degradation, which isn’t directly connected with implantation time. Research limitations/implications: The polyurethane degradation and surface damage is probably connected with its hydrolysis. The potential effect of blood interaction with VAD inner surface was discussed. Originality/value: of this paper is spectrophotometer and microscopic studies of polyurethane surface in the polish extracorporeal ventricular assist device POLVAD-MEV.
3
Content available remote Researches of topography and optical properties of the thin films NiPc/PTCDA donor acceptor couple
Weszka J., Jarka P., Chwastek-Ogierman M., Hajduk B.
Journal of Achievements in Materials and Manufacturing Engineering
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2012
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Vol. 53, nr 2
81--88
EN
Purpose: The aim of this work consists of researches of surface topography and optical properties of organic thin films of NiPc : PTCDA blends deposited by thermal evaporation from one source. Thin films of organic materials are provided as donor/acceptor couple in heterojuction solar cells. Design/methodology/approach: Films consisting of NiPc and PTCDA mixture were deposited by thermal evaporation from one source. By using blends with different PTCDA to NiPc ratios and steering the temperature of the sources and hence deposition rate different properties of layers are obtained. Findings: Both the chemical composition and technological parameters of deposition process has appeared to influence on optical properties and surface morphology of thin films. These parameters were found to influence surface morphology and UV-Vis absorption spectra. Research limitations/implications: The paper shows the methodology of deposition NiPc/PTCDA donor/ acceptor blends and the influence of evaporation parameters on properties of thin films. That can be used for the research of the planar heterojunction solar cells based on NiPc/PTCDA heterojunction donor-acceptor couple active layers. Practical implications: Results of researches suggest that blends of NiPc and PTCDA can be useful materials in organic photovoltaic device. However right deposition parameters and the blends proportions determine the properties of NiPc/PTCDA donor/acceptor thin films. Originality/value: The goal of this paper is to definie the surface topography and optical properties of thin films NiPc/PTCDA blends prepared with different proportions of components and parameters of evaporation process.
4
Content available remote Investigations of morphology and optical properties of thin films of TiOPc/PTCDA donor acceptor couple
Weszka J., Jarka P., Hajduk B., Chwastek-Ogierman M.
Journal of Achievements in Materials and Manufacturing Engineering
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2012
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Vol. 55, nr 2
396--402
EN
Purpose: The aim of this work is studying surface topography and optical properties of organic thin films of TiOPc and PTCDA blends deposited by thermal vacuum evaporation. Design/methodology/approach: Thin films of blends of organic materials are provided as donor/acceptor couples in bulk heterojunction based organic solar cells. Thin films of TiOPc - PTCDA mixture have been deposited by thermal vacuum evaporation from one source with various ratios of blends components and deposition rates used. Both the chemical composition and technological parameters of the deposition process have appeared to influence on optical properties, UV-Vis absorption spectra in particular, and surface morphology of the as-prepared thin films. The paper reveals the methodology of deposition thin films of TiPc-PTCDA donor/ acceptor blends and the influence of deposition parameters on their properties. Findings: Thin films of such blends can be used for the research on the planar heterojunction solar cells based on donor-acceptor couple active layers. Results of these investigations suggest that blends of TiOPc and PTCDA can be suitable materials for preparing organic photovoltaic devices. Research limitations/implications: Deposition parameters and proportions of the blend components used determine the properties of TiOPc/PTCDA thin films. Originality/value: The goal of this paper is also to define relations connecting the surface morphology and optical properties of thin films of TiOPc-PTCDA blend prepared with their composition and parameters of the evaporation process.
5
Content available remote Reconstruction of thin films polyazomethine based on microscopic images
Weszka J., Szindler M., Śliwa A., Hajduk B., Jurusik J.
Archives of Materials Science and Engineering
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2011
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Vol. 48, nr 1
40-48
EN
The aim of this paper was to investigate changes in surface morphology of thin films of polyazomethine PPI. Thin films were prepared using low-temperature chemical vapor deposition (CVD) method.
6
Content available remote Influence of technological conditions on optical properties and morphology of spin-coated PPI thin films
Chwastek M., Weszka J., Jurusik J., Hajduk B., Jarka P.
Archives of Materials Science and Engineering
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2011
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Vol. 48, nr 2
69-76
EN
The aim of this paper is to show technical and chemical parameters influence on optical properties and morphology of poly (1,4-phenylenemethylenenitrilo- 1,4-phenylenenitrilomethylene) (PPI) thin films prepared by spin-coating method
7
Content available remote Tailoring electronic structure of polyazomethines thin films
Wieszka J., Hajduk B., Domański M., Chwastek M., Jurusik J., Jarząbek B., Bednarski H., Jarka P.
Journal of Achievements in Materials and Manufacturing Engineering
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2010
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Vol. 42, nr 1-2
180-187
EN
Purpose: The aim of this work is to show how electronic properties of polyazomethine thin films deposited by chemical vapor deposition method (CVD) can be tailored by manipulating technological parameters of pristine films preparation as well as modifying them while the as-prepared films put into iodine atmosphere. Design/methodology/approach: The recent achievements in the field of designing and preparation methods to be used while preparing polymer photovoltaic solar cells or optoelectronic devices. Findings: The method used allow for pure pristine polymer thin films to be prtepared without any unintentional doping taking place during prepoaration methods. This is a method based on polycondensation process, where polymer chain developing is running directly due to chemical reaction between molecules of bifunctional monomers. The method applied to prepare thin films of polyazomethines takes advantage of monomer transporting by mreans of neutral transport agent as pure argon is. Research limitations/implications: The main disadvantage of alternately conjugated polymers seems to be quite low mobility of charge carrier that is expected to be a consequence of their backbone being built up of sp2 hybridized carbon and nitrogen atoms. Varying technological conditions towards increasing reagents mass transport to the substrate is expected to give such polyazomethine thin films organization that phenylene rin stacking can result in special đ electron systems rather than linear ones as it is the case. Originality/value: Our results supply with original possibilities which can be useful in ooking for good polymer materials for optoelectronic and photovoltaic applications. These results have been gained on polyazomethine thin films but their being isoelectronic counterpart to widely used poly p-phenylene vinylene may be very convenient to develop high efficiency polymer solar cells.
8
Content available remote Comparing of optical properties and morphology of polyoxadiazoles with CF3 groups
Hajduk B., Jarka P., Weszka J., Bruma M., Jurusik J., Chwastek M., Mańskowski D.
Journal of Achievements in Materials and Manufacturing Engineering
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2010
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Vol. 40, nr 1
7-14
EN
Purpose: The aim of this paper is to compare optical properties of 4-(1,1,1,3,3,3-hexafluoro-2(-4(-3(4-(5-(4-m-tolyoxy)phenyl)-1,3,4-oxadiazol-2-yl)phenoxy)phenylcarbomyl)phenyl)propan2-yl)-N-methylbenzamide (Oxad 6F-D) and 4-(1,1,1,3,3,3-hexafluoro-2(-4-(4-(4-(5-(4-(p-tolyoxy)phenyl)-1,3,4-oxadiazol-2-yl)phenoxycarbaomyl)phenyl)propan-2-yl)-N-methylbenzamide (Oxad 6F-E). Design/methodology/approach: The Oxad 6F polymer thin films were deposited onto glass and KBr substrates by spin–coating method under different technological conditions. Findings: The spinning rate V and solution concentration C influenced optical properties of Oxad 6F-D and Oxad 6F-E thin films. The goal of this paper is to show differences in properties of these polymers. Research limitations/implications: The electrical and luminescent properties of Oxad 6F polymers will be carried out in the nearest time. The different properties of these polymers are caused by benzene position in the polymer chain, two aromatic rings are in meta-position in Oxad 6F-D and all benzene rings are in para-positions in Oxad 6F-E. Practical implications: Thin films of Oxad 6F-D and Oxad 6F-E are good potential material for applications in polymer optoelectronic devices. Originality/value: The aim of this paper is to describe the optical properties of Oxad 6F polymers prepared under different technological conditions.
9
Content available remote Studying of polyoxadiazole with Si atom in the backbone
Hajduk B., Jarka P., Weszka J., Bruma M., Jurusik J., Chwastek M., Mańkowski D.
Archives of Materials Science and Engineering
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2010
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Vol. 42, nr 2
77-84
EN
Purpose: The aim of this paper is to show properties of spin-coated thin films of new polymer having silicon atom in the backbone. This amorphous polymer has appeared to be applied as active films in organic devices (as OLED). Design/methodology/approach: Thin films of 4-(diphenyl(4-(4-(5-(p-tolyoxy)phenyl)-1,3,4-oxadiazol-2-yl)phenyloamino)methyl)-phenyl)silyl)-1-methylbenzamide (Oxad–Si-B) were obtained by spin-coating method. The methodology of preparing was changing of technological parameters such as solution concentration and spinning rate V. The films were deposited with five spinning rates. Findings: Such technological parameters as spinning rate and solution concentration has appeared to influence optical properties of thin films. These parameters were found to influence surface morphology and UV-Vis absorption spectra of thin films. Research limitations/implications: The optical properties of obtained films will allow further researches of this polymer. Its optical properties allow carrying of electrical measurements, which will be carried out in the nearest time. Practical implications: The value of Oxad-Si (B) energy gap suggests its luminescent properties and applications of this material as active film in optoelectronic devices. Originality/value: The goal of this paper is to show optical properties of thin films prepared with most optimal technology conditions.
10
Content available remote Studying of spin-coated oxad-Si properties
Weszka J., Dobrzański L. A., Jarka P., Jurusik J., Hajduk B., Bruma M., Konieczny J., Mańskowski D.
Journal of Achievements in Materials and Manufacturing Engineering
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2009
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Vol. 37, nr 2
505-511
EN
Purpose: The major aim of this paper was describing technical conditions of polymer thin film deposition by spin-coating techniques. Design/methodology/approach: Thin films of about nanometres thickness were prepared by spin-coating and their properties were studied. As a material for preparing polymer thin films oxad-Si was used. The thin films were deposited with various spinning velocity from solution of different concentration. Thin films were deposited on BK7 glass and quartz substrates. Findings: The obtained results describe influence of the solution concentration and spinning velocity on morphology and optical properties of spin-coated oxad-Si thin films. Research limitations/implications: The obtained results confirm the oxad-Si availability for optoelectronic application to be stipulated. Practical implications: The morphology and optical properties of Oxad-Si polymer thin films were described. This paper include also description of the influence of deposition conditions on properties of polymer thin films. Originality/value: The value of this paper is defining the optimal parameters of spin-coating technology for preparing oxad-Si thin film with the best properties for optoelectronics appliances. This paper describes new experimental polymeric material for spin coating technology. Results of these researches enable to develop the spin-coating technology.
11
Content available remote Influence of LCVD technological parameters on properties of polyazomethine thin films
Hajduk B., Weszka J., Jurusik J.
Journal of Achievements in Materials and Manufacturing Engineering
|
2009
|
Vol. 36, nr 1
41-48
EN
Purpose: The aim of this paper is to show influence of technological parameters (temperature and gas stream intensity) of low-temperature chemical vapour deposition (LCVD) on optical properties and morphology of polyazomethine thin films. Design/methodology/approach: Thin layers of poly (1,4-phenylene-methylenenitrilo-1,4-phenylenenitrilo-methylene) (PPI) were prepared by low temperature LCVD method with use of argon as a transport agent. The UV-Vis spectroscopy and AFM microscopy measurements on PPI thin films were performed. Findings: The LCVD parameters, like temperature and argon stream intensity, influence growth rate, morphology and optical properties of polyazomethine thin films. Optimalization of technical parameters allows for thin films with desired properties to be prepared. Research limitations/implications: Optimalization of technical LCVD parameters leads to preparing PPI thin films having desired morphology and optical properties suitable for optoelectronic applications. Practical implications: PPI polyazomethine is good material for potential applications as the active layer in optoelectronic or photonic structure (diods or photovoltaic cells). Originality/value: LCVD with use of argon is relatively new method for preparing of thin polymer films. Recognizing of optimal technical parameters will make possible getting of thin films with required properties.
12
Content available remote Optical properties of polyazomethine with oxygen atom in the backbone
Hajduk B., Weszka J., Cozan V., Kaczmarczyk B., Jarząbek B., Domański M.
Archives of Materials Science and Engineering
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2008
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Vol. 32, nr 2
85-88
EN
Purpose: The aim of this paper is to show results of optical measurement performed on poly - (1-(4-methylenephenoxy-1)phenylene-4-methylene-1.4-phenylnenitrylomethylene) (PPI2) polyazomethine thin films and to compare with poly - (1.4-phenylenemethylenenitrilo-1.4 phenylenenitrilomethylene) (PPI). Design/methodology/approach: Influence of oxygen atom in the polymer chain on optical properties of polyazomethine was investigated. Optical UV-VIS and FTIR absorption spectra of polyazomethine PPI2 with oxygen atom were recorded and X-ray patterns of these polymers were performed. Findings: The oxygen atom incorporated in ordered way into PPI2 chain breaks conjugation and cause increase of energy gap in polymer. Research limitations/implications: The oxygen atom incorporated between phenylene rings of dialdehyde changes PPI chain into sequence of alternative three ring conjugated fragments and oxygen atoms. Practical implications: Addition of oxygen atom inside aldehyde fragment in polyazomethine chain influences conformation of polymer. The prepared layers of polyazomethine with oxygen atom in the backbone are expected to be more amorphous and more luminescent properties. Originality/value: Polyazomethine is very interesting material as it has nitrogen atom in the backbone, and is isoelectronic counterpart of polyparaphenylenevinylene (PPV). This paper shows that addition of oxygen atom into polyazomethine chain influences its optical properties.
13
Thin PPI films doped with iron (III) chloride
Hajduk B., Weszka J., Jurasik J., Jarząbek B.
Zeszyty Naukowe Politechniki Poznańskiej. Budowa Maszyn i Zarządzanie Produkcją
|
2007
|
Nr 4
65-69
EN
Optical spectra were recorded on polyazomethine thin films pristine and doped with iron (III) chloride. Doping process is seen to smear the absorption edge in UV-VJS spectra, which is attributed to polaron states formation. Positive polaron states appear within the forbidden gap of PPI, above valence band. Thopographic AFM images have shown variation in films morphology connected with surface granulation and RMS changes.
PL
W artykule przedstawiono wyniki badań optycznych wykonanych na cienkich warstwach poli-azometiny PPI, czystych i domieszkowanych chlorkiem żelaza (III). W widmach optycznych domieszkowanie powoduje rozmycie krawędzi absorpcji, które przypisuje się wytworzeniu stanów potaronowych w przerwie energetycznej polimeru. W widmie widoczne są jako progresje wi-broniczne o energii mniejszej niż szerokość pasma zabronionego. Zdjęcia topograficzne AFM wykazują że powierzchnie warstw domieszkowanej! niedomieszkowanej maja inną wielkość uziarnienia. a także różnią się współczynnikiem nierówności powierzchni RMS.
14
Content available remote Physical properties of polyazomethine thin films doped with iodine
Hajduk B., Weszka J., Jarząbek B., Jurusik J., Domański M.
Journal of Achievements in Materials and Manufacturing Engineering
|
2007
|
Vol. 24, nr 2
67-70
EN
Purpose: The aim of this paper is to show influence of doping 1,4-phenylene-methylenenitrilo-1,4- phenylenenitrilomethylene (PPI) with iodine and to propose doping mechanism and its impact on electronic structure of doped PPI thin films. Design/methodology/approach: Influence of iodine doping on electronic structure of polyazomethine thin films was investigated. Optical absorption spectra, XRD spectra and AFM images of doped PPI thin films were recorded. Findings: Doping mechanism relys on removing one electron from PPI pi-system by 12 molecules and forming counterions 13-. Formation of positive polaron means that doping of polyazomethine PPI is p - type. Research limitations/implications: Influence of iodine doping on electrical properties (with increasing of temperature) of PPI thin layers will be checking with Kethley appliance. We plan these measurements to be done in the foreseeable future. Practical implications: Iodine doping of thin PPI films process could results in better electrical conductivity of PPI, so doped polyazomethine films could find some applications for photonic and optoelectronic devices. Originality/value: Conjugated PPI is rarely enough reported but it is very interesting material as it has nitrogen atom in the backbone and it is isoelectronic counterpart of polyparaphenylenevinylene (PPV). This paper show that doping influences on surface morphology, cristallinity and optical properties of polymer. Furthermore, doping mechanism and changes of polymer electronic structure have been proposed in this paper.
15
Content available remote Hierarchia wartości studentów zarządzania i marketingu
Hajduk B.
Management
|
1998
|
nr 4
36-47
PL
Artykuł stanowi próbę odpowiedzi na pytanie: jakie cele życiowe i sposoby postępowania preferuje młodzież akademicka przygotowująca się do zawodu menedżera w mieście średniej wielkości zachodniego pogranicza? Prezentację wyników badań poprzedza analiza znaczenia pojęć: "wartośi" i "systemu wartości" nadanego im przez M. Rokeacha. Znajomość wartości cenionych przez studentów rozpoczynających studia na kierunku zarządzanie i marketing może sprzyjać efektywnemu kształtowaniu sylwetki profesjonalnej menedżera.
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