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1
Content available remote Direct determination of the refraction index normal dispersion for thin films of 3, 4, 9, 10-perylene tetracarboxylic dianhydride (PTCDA)
Cisowski J, Jarząbek B, Domański M
Optica Applicata
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2012
|
Vol. 42, nr 1
181--192
EN
The improved approach for analysis of the thin film optical spectra exhibiting the interference fringes is presented. It is shown that, based on the positions of adjacent extrema, the interference order numbers can be easily identified allowing for determination of a model-free normal dispersion of the refraction coefficient provided the film thickness is known from an independent measurement. The usefulness of the presented method is illustrated by the analysis of the reflection spectra obtained for thin films of 3, 4, 9, 10-perylene tetracarboxylic dianhydride (PTCDA) with various thicknesses determined with the atomic force microscopy (AFM).
2
Content available remote Parametry optyczne cienkich warstw krzemionkowych na podłożach krzemowych
Skoczek E., Cisowski J., Karasiński P., Jaglarz J., Jarząbek B.
Materiały Ceramiczne
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2012
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T. 64, nr 2
282-285
PL
W pracy przedstawiono wyniki badań właściwości optycznych cienkich warstw krzemionkowych. Badane warstwy zostały wytworzone w technologii zol-żel i naniesione na krzemowe podłoża metodą zanurzeniową. Badania przeprowadzono metodami elipsometrycznymi i spektrofotometrycznymi, a analiza otrzymanych wyników pozwoliła na wyznaczenie parametrów optycznych badanych warstw takich jak zależności dyspersyjne współczynników załamania oraz ekstynkcji. Dodatkowo, wyznaczono grubości warstw oraz ich porowatość. Ze względu na niską wartość współczynnika załamania (1,22-1,25) warstwy krzemionkowe są stosowane jako powłoki antyrefleksyjne oraz elementy światłowodów planarnych.
EN
Studies of optical properties of thin silica fi lms are shown in the paper. The films were manufactured by the sol-gel method combined with spreading on a silicon substrate by immersing. The studies were performed by ellipsometric and spectrophotometric methods to determine optical characteristics of the films such as dispersion dependences of refractive indices or extinction coeffi cients. Moreover, the thickness and porosity of the films were determined. The silica layers are used as antireflective coatings and components of planar optical fibres due to low values of refractive index (1,22-1,25).
3
Content available Ocena wpływu simwastatyny na degradację terpolimeru z pamięcią kształtu
Jaros A., Jarząbek B., Rowińska K., Kasperczyk J., Janeczek H., Smola A.
Engineering of Biomaterials
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2012
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Vol. 15, no. 115
45--51
PL
Zbadany został wpływ simwastatyny na degradację terpolimerów LL-laktydu, glikolidu i węglanu trimetylenu z pamięcią kształtu. Badano mechanizm degradacji in vitro, w izotonicznym roztworze chlorku sodu buforowanym fosforanami (PBS), matryc polimerowych wykonanych z dwóch materiałów z różną zawartością leku i bez simwastatyny. Polimery charakteryzowano przy użyciu: różnicowej kalorymetrii skaningowej (DSC) (właściwości termiczne), chromatografii żelowej (GPC) (masy cząsteczkowe) i spektroskopii magnetycznego rezonansu jądrowego (NMR) (skład i mikrostruktura). Profil uwalniania leku oceniano metodą spektroskopii UV-Vis. Oceniono przydatność badanych materiałów do zastosowania w produkcji biozgodnych polimerowych resorbowalnych chirurgicznych systemów z pamięcią kształtu z własnością kontrolowanego uwalniania leku. Nie odnotowano istotnego wpływu 1% zawartości leku na przebieg degradacji.
EN
The influence of simvastatin on degradation of terpolymers synthesized from L-lactide, glycolide, and trimethylene carbonate has been analyzed. The in vitro degradation of the matrices, obtained from two terpolymers with various chain structure and amount of simvastatin, was carried out in phosphate buffered solution. The terpolymers were characterized by using differential scanning calorimetry (DSC) (thermal properties), gel permeation chromatography GPC (molecular weights) and nuclear magnetic resonance (NMR) (composition and microstructure). Release profile of simvastatin was analyzed by means of UV-Vis spectroscopy. It was determined that the tested materials are useful for development of biocompatible resorbable surgical systems with the shape memory effect and controlled drug-release capability. There was no significant difference in the degradation process between the matrices without drug and with 1% of simvastatin.
4
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.
5
Content available Biodegradowalny polimerowy system uwalniania radiouczulacza - badania in vitro
Buszman A., Kasperczyk J., Jarząbek B., Stokłosa K., Smola A.
Engineering of Biomaterials
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2010
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Vol. 13, no. 99-101
67--71
PL
W pracy przedstawiono wyniki badań uwalniania radiouczulacza metronidazolu z jednowarstwowych oraz trójwarstwowych matryc kopolimeru glkolidu z laktydem do sztucznego płynu mózgowo rdzeniowego ACFs. Przeprowadzono analizę mikrostruktury łańcuchów polimerowych w oparciu o spektroskopię magnetycznego rezonansu jądrowego. Badanie uwalniania leku prowadzono w systemie dynamicznym z regularną wymianą buforu we fiolkach poddanych wytrząsaniu. Ekstrakty analizowano metodą spektrometrii UV-VIS. Równolegle prowadzono badania degradacji matryc z lekiem pod kątem oceny zmian w mikrostrukturze łańcucha polimerowego. Badania wykazały znacznie szybszą degradację matryc wykonanych z kopolimeru glikolidu z D,L-laktydem w porównaniu z matrycami z kopolimeru glikolidu z L-laktydem. Ponadto wykazano że opłaszczenie matrycy zawierającej lek polimerem bez leku (matryce trójwarstwowe) zapobiega nagłemu wyrzutowi leku z powierzchni w pierwszych dniach uwalniania.
EN
In this paper the results of radiosensitizer metronidazole release investigation from mono- and triple-layered copolymeric matrices in artificial cerebro- spinal fluid solution (ACFs) are presented. The analysis of polymeric chain microstructure by the NMR has been conducted. Drug release study was performed in the dynamic system with regular buffer exchange in constantly stirred glass ampoules. The extracts were analyzed by the UV-VIS spectrometry. Drug carrying matrices degradation research were conducted to evaluate possible changes in polymeric chain microstructure. The results showed that matrices containing poly(glycolide-co-D,L-lactide) demonstrate higher degradation rate than matrices containing poly(glycolide-co-L-lactide). It has been proved that drug carriers coated with drug-free polymer (triplelayered matrices) prevents from burst effect.
6
Content available Wpływ budowy dwuwarstwowych biodegradowalnych systemów polimerowych na proces uwalniania cyklosporyny A
Jelonek K., Kasperczyk J., Dobrzyński P., Jarząbek B., Klenczar B., Sobota M.
Engineering of Biomaterials
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2009
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Vol. 12, no. 89-91
182--185
7
Content available Ocena wpływu mikrostruktury łańcucha kopolimerowego na kinetykę uwalniania cyklosporyny A (CyA) i rapamycyny z matryc wykonanych z poli(l-laktydo-ko-glikolidu)
Jelonek K., Kasperczyk J., Dobrzyński P., Jarząbek B., Gębarowska K., Jaworska J.
Engineering of Biomaterials
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2008
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Vol. 11, no. 81-84
1--4
8
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.
9
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
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2007
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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.
10
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
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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.
11
Content available remote Optical investigations concerning layered metalphthalocyanine nanostructures affected by NO2
Pustelny T., Ignac-Nowicka J., Jarząbek B., Burian A.
Optica Applicata
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2004
|
Vol. 34, nr 4
551-561
EN
The paper deals with investigations concerning the coefficient of optical transmission of selected metalphthalocyanine layers, viz. CuPc, NiPc, PbPc and CoPc by means of optical spectroscopy. The coefficient of transmission was investigated for phthalocyanine layers in the presence of atmospheric air and after the exposition of these layers to 100 ppm nitrogen dioxide. These investigations concerned wavelengths in the range from about 300 to 1300 nm. Moreover, several phthalocyanine layers were measured in the air and at 100 ppm NO2 applying the X-ray diffraction method. These investigations have made it possible todetermine changes occurring in the structure of phthalocyanine exposed to nitrogen dioxide.
12
Content available remote Roughness of amorphous Zn-P thin films
Jarząbek B., Jurusik J., Cisowski J., Nowak M.
Optica Applicata
|
2001
|
Vol. 31, nr 1
93-101
EN
The effect of thickness variation and the surface roughness of amorphous Zn/sub 32/P/sub 68/ thin films has been investigated by the interference spectroscopy of the optical transmittance and reflectance, as well as by the atomic force microscopy (AFM). The analysis of the optical data allowed determination of the standard deviation of the thin film thickness by taking into account the Gaussian distribution of the change in phase of radiation traversing a thin film. It appears that the value of the standard deviation of the film thickness determined from the optical interference spectroscopy ( sigma /sub w/ approximately=26 nm) is comparable with the value of the mean surface roughness (R/sub a/ approximately=19 nm) evaluated from the AFM studies.
13
Kable do systemów okablowania strukturalnego z oferty produkcyjnej ELEKTRIM KABLE S.A.
Anuszewska H., Jarząbek B., Wronikowski M.
Elektronizacja : podzespoły i zastosowania elektroniki
|
2000
|
nr 5
20-21
14
Kable teleinformatyczne produkcji fabryki Kabli Ożarów S.A. na tle aktualnych wymagań dla okablowania strukturalnego
Jarząbek B.
Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
|
1999
|
nr 1
54-56
PL
Omówiono podstawowe parametry transmisyjne kabli teleinformatycznych i ich wpływ na jakość okablowania w zaleźności od rodzaju stosowanej aplikacji. Przedstawiono wyniki badań kabli produkowanych w Fabryce Kabli OŻARÓW S.A., certyfikowanych przez niezależne laboratorium badawcze IBM.Ŕ ćżv+‹
EN
Main transmission characteristics of high speed data cables and their influence for structural cabling quality used for different types of applications were discussed. Resultas of testing of data cables produced by Cable Factory 'Ożarów' Co. (FKO S.A.) and certified by independent testing IBM laboratory were presented.ćżv'ö@
15
Some optical properties of amorphous In-Se thin films
Michalewicz A., Jarząbek B., Cisowski J., Jurusik J., Burian A. M., Weszka J.
Electron Technology
|
1998
|
Vol. 31, No. 3/4
411-416
EN
Studies of the optical properties of amorphous thin films of In-Se (a-In-Se) thermally evaporated from the bulk polycrystalline In2Se3 are presented. The absorption coefficient and rrefractive index are obtained from the transmission and reflectivity spectra, covering the energy range 0.4÷6.2 eV. The fundamental absorption edge, found from the tauc relation, increases from 1.64 eV to 1.73 eV, when decreasing the deposition rate from 0.7 nm/s to 16.7 nm/s. The values of refractive index are of 2.60÷2.67 and the broad peak in the reflectivity spectra at about 5 eV is thought to be attributed to the four-coordinated In atoms which are dominated in a-In-Se films under study. The surface morphology has been examineted by the atomic force microscopy (AFM) showing that the surface of the films studied is rather smooth with, however, some growth defects of density depending on the deposition conditions.
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