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Search results for: polyethylene films
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Influence of Cr Ion Implantation on Physical Properties of CuO Thin Films
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Micropatterning of BiVO 4 Thin Films Using Laser-Induced Crystallization
PublicationRelatively high temperatures even up to 500 °C are required to obtain bismuth vanadate (BiVO4) films with the scheelite monoclinic (s-m) structure that shows the highest photocatalytic activity. This requirement limits the possible choice of substrates. Moreover, high quality thin layers of crystalline BiVO4 cannot be prepared with current methods. In this study a light-induced crystallization approach is presented, which is a...
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Triplet exciton interactions in solid films of an elektrophosphorescent Pt(II) porphyrin
PublicationW pracy pokazano, że fosforescencja porfiryny platynowej (PtOEP) jest wygaszana na skutek oddziaływania między monomerowymi i dimerowymi ekscytonami trypletowymi. Stała oddziaływania dla monomerowych ekscytonów trypletowych wynosi 8x10-12 cm3/s a dla ekscytonów dimerowych 8x10-15 cm3/s.
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Striking influence of chain structure of polyethylene on the formation of cup-stacked carbon nanotubes/carbon nanofibers under the combined catalysis of CuBr and NiO
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Characterization of volatile compounds, structural, thermal and physico-mechanical properties of cross-linked polyethylene foams degraded thermo-mechanically at variable times
PublicationWaste cross-linked polyethylene foam (wXLPE) was thermo-mechanically degraded at variable time using internal batch mixer. The progress of wXLPE degradation has been investigated by using a simultaneous thermogravimetric/differential scanning calorimetry analyzer coupled with Fourier transform infrared spectroscopy, swelling measurements, tensile tests and scanning electron microscopy. Volatile organic compounds generated during...
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Searching for metric structure of musical files
PublicationCelem opisywanych prac jest porównanie efektywności wybranych metod sztucznej inteligencji w wyznaczaniu rytmu dla zapisu symbolicznego muzyki. Opisano sposób wykorzystania sztucznych sieci neuronowych i zbiorów przybliżonych do poszukiwania właściwej struktury rytmicznej utworu. Analizowane są fizyczne atrybuty dźwięku, które są najbardziej znaczące dla określenia położenia dźwięku na pozycji akcentowanej lub nieakcentowanej....
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Nitrogen-doped diamond thin films: potential application in Fabry-Pérot interferometer
PublicationIn this paper we present results of preliminary research of using nitrogen-doped diamond (NDD) films as reflective layer in Fabry-Pérot interferometer. NDD films were deposited on Si substrates by Microwave Plasma Enhanced Chemical Vapor Deposition (MPECVD) with the use of CH4, H2 and N2 gas mixtures. During deposition process methane flow rate varied while nitrogen flow was constant. We performed series of measurements which showed...
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The influence of the substrate temperature on the preparation of DNA films for studies under vacuum conditions
PublicationExperiments were carried out to determine the dependence of the physical form of supercoiled DNA films on the initial temperature of the substrate. Such films are often used in irradiation experiments involving low energy particles, like electrons or photons. In order to obtain absolute values for cross sections for such experiments, the spatial distribution of the sample in the film has to be well estimated. These investigations...
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Spectroscopic Study of Plasma Polymerized a-C:H Films Deposited by a Dielectric Barrier Discharge
PublicationPlasma polymerized a-C:H thin films have been deposited on Si (100) and aluminum coated glass substrates by a dielectric barrier discharge (DBD) operated at medium pressure using C2Hm/Ar (m = 2, 4, 6) gas mixtures. The deposited films were characterized by Fourier transform infrared reflection absorption spectroscopy (FT-IRRAS), Raman spectroscopy, and ellipsometry. FT-IRRAS revealed the presence of sp3 and sp2 C–H stretching and...
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Can popular films instil carcinophobia? Images of cancer in popular Polish cinema
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Enhancement of second harmonic generation in nanocrystalline SiC films based natural microcavities
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Chitosan-based films with cannabis oil as a base material for wound dressing application
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Magnetic anisotropy in the exchange-biased laser-patterned thin Co/CoO films
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Tuning of the Titanium Oxide Surface to Control Magnetic Properties of Thin Iron Films
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Can popular films instil carcinophobia? Images of cancer in popular Polish cinema
PublicationIntroduction: Although cancer is currently considered a serious socio-medical challenge and health education in Poland has been positioned as a public health priority, the impact of popular culture on people’s ideas about cancer has been neglected. This study therefore aims to analyse the way popular Polish films portray cancer and the experience of cancer.Material and Methods: Seven popular Polish films featuring cancer...
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Surface Property Modification of Collagen, Hyaluronic Acid, and Chitosan Films with the Neodymium Laser
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In situ optical studies of thermal stability of iodine-doped polyazomethine thin films
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Studies of Transport Properties of Single Layer Devices Based on the Polyazomethine Thin Films
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P3HT:PCBM blend films phase diagram on the base of variable-temperature spectroscopic ellipsometry
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Phase diagram of P3HT:PC70BM thin films based on variable-temperature spectroscopic ellipsometry
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Examining the Impact of Squaric Acid as a Crosslinking Agent on the Properties of Chitosan-Based Films
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In plane and out of plane temperature dependencies of the resistivity insingle crystals and films of Nd2CuO4.
PublicationW pracy przedstawiono temperaturową zależność oporu elektrycznego kryształów i cienkich warstw związku Nd2CuO4. Dyskutowany jest wpływ temperatury i atmosfery dodatkowej obróbki termicznej na własności transportowe.
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Fluorescence depolarization in the presence of excitation energy migration in partly ordered polymer films.
PublicationW pracy przedstawiono wyniki pomiarów i symulacji Monte Carlo zaników anizotropii emisji fluorescencji dla układu 3,3'-diethylthiacyanine iodine (barwnik) w osiowo rozciąganych foliach polimerowych.
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Structure and electrical properties of nitrided NbN-TiN sol-gel derived films
PublicationW pracy przedstawiono rezultaty badań struktury oraz właściwości elektrycznych warstw NbN-TiN (o różnym stosunku molowym NbN/TiN)otrzymanych w wyniku termicznego azotowania warstw tlenkowych otrzymanych metodą zol-żel. Badania struktury przeprowadzono metodami AFM, XRD oraz XPS. Wynika z nich, iż głównymi fazami w wartstwach są NbN i TiN o rozmiarach ziaren około 100 nm. Jednakże zaobserwowano również istnienie niewielkiej ilości...
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Magnetotransport Properties of Semi-Metallic Bismuth Thin Films for Flexible Sensor Applications
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Deposition of EDOT-Decorated Hollow Nanocapsules into PEDOT Films for Optical and Electrochemical Sensing
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Optical properties of boron-doped nanocrystalline diamond films studied by spectroscopic ellipsometry
PublicationThe optical properties of boron-doped nanocrystalline diamond films, coated using Microwave Plasma Enhanced Chemical Vapour Deposition (μPE CVD) system, were analyzed by spectroscopic ellipsometry. Diamond films were deposited on silicon substrates. The ellipsometry data (refractive index (n(λ)), extinction coefficient (k(λ)) were modeled using dedicated software. Evolution of the optical structure with boron doping was observed...
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Nitrogen-incorporated boron-doped diamond films for enhanced electrochemical supercapacitor performance
PublicationThe electrochemical (EC) supercapacitor, known for its rapid charging, reliability, and versatile applications, demands optimized electrode characteristics and an understanding of their electrochemical behaviour. Although boron-doped diamond (BDD) holds promise as a supercapacitor electrode, a crucial gap exists in comprehending its material behaviour under specific growth conditions. Here, nitrogen-incorporated BDD (N-BDD) films...
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PVA-Based Films with Strontium Titanate Nanoparticles Dedicated to Wound Dressing Application
PublicationBioactive materials may be applied in tissue regeneration, and an example of such materials are wound dressings, which are used to accelerate skin healing, especially after trauma. Here, we proposed a novel dressing enriched by a bioactive component. The aim of our study was to prepare and characterize poly(vinyl alcohol) films modified with strontium titanate nanoparticles. The physicochemical properties of films were studied,...
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Maillard-reaction (glycation) of biopolymeric packaging films; principles, mechanisms, food applications
PublicationBackground The biodegradable, biocompatible, sustainable, and renewable nature of biomaterials has led to increased interest in developing biopolymeric food packaging films (BFPFs) with green ingredients and strategies. To enhance the performance of these films, biopolymer molecules can be modified or combined with additives like nanomaterials, cross-linkers, bioactive compounds, and other polymers, particularly with Maillard-reaction...
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Transformation of bimetallic Ag–Cu thin films into plasmonically active composite nanostructures
PublicationFormation of plasmonically active silver, copper and composite silver-copper nanostructures were studied in this paper. Metallic nanostructures were fabricated by thermal disintegration, so called dewetting, of the thin films in an argon atmosphere. The formation process of the nanostructures was in-situ observed by a novel method, based on resistance measurements. The influence of the material and thickness of the initial thin...
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Turbulent heat transfer in thin liquid films at low and high heat fluxes
PublicationW pracy przedstawiono rozważania turbulentnej wymiany ciepła w cienkich filmach cieczowych powstałych w wyniku uderzenia strugi przy małych i dużych strumieniach ciepła. W ostatnim przypadku może dojść do wrzenia filmu cieczowego. Oba zjawiska zamodelowano i uzyskano odpowiednie rozkłady temperatury i pedkosci.
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The influence of the substrate temperature on the preparation of DNA films for studies under vacuum conditions
PublicationPrzeanalizowano wpływ temperatury na formowanie warstw DNA. Sprawdzono wpływ stabilizatorów na jakość otrzymanych próbek. Stwierdzono, że optymalnymi warunkami przygotowywania filmów do badań w warunkach próżniowych jest - 10 st. C przy minimalnej zawartości NaOH.
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Optical and chemical characterization of thin TiNx films deposited by DC-magnetron sputtering
PublicationThin titanium nitride (tinx) films were deposited on silicon substrates by means of a reactive dc-magnetron plasma. Layers were synthesized under various conditions of discharge power and nitrogen flows in two operation modes of the magnetron (the so-called "balanced" and "unbalanced" modes). The optical constants of the tinx films were investigated by spectroscopic ellipsometry (se). X-ray photoelectron spectroscopy (xps) was...
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Fast dynamics in the optical storage with Langmuira-Blodgett films of a diazocrown ether molecule
PublicationMolekuły z resztą azobenzenu badano z punktu widzenia licznych aplikacji wykorzystujących cykle fotoizomeryzacji trans-cis-trans, wiodących do uporządkowania cząsteczek, a nawet do transportu masy w mikroskali. Ważnym ograniczeniem dla tych materiałów jest powolna dynamika procesu porządkowania, wymagającego molekularnych przekształceń. W tej pracy informujemy o filmach Langmuira-Blodgett (LB) pochodnej eteru azokoronowego (29-membered...
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Structural investigations of nitrided Nb2O5 and Nb2O5-SiO2 sol-gel derived films
PublicationPraca zawiera badania struktury azotowanych warstw Nb2O5-SiO2 (o różnym stosunku molowym Nb2O5/SiO2)otrzymanych metodą zol-żel. Azotowanie przeprowadzono w różnych temperaturach z zakresu 800-1200C. W wyniku azotowania w warstwach powstają metaliczne granule NbN w amorficznej matrycy SiO2. Przemiany strukturalne zachodzące podczas azotowania badano metodą dyfrakcjii rentgenowskiej (XRD), rentgenowską spektroskopią fotoelektronów...
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Structural and optical investigations of sol-gel derived lithium titanate thin films
Publicationin this paper structural and optical studies of lithium titanate (lto) thin films are presented. nanocrystalline thin films with 800 nm thickness were prepared by sol-gel method. to examine the influence of the annealing time on as-prepared films crystallization, the coatings were heated at 550 °c for 10, 20 and 80 h. structure of manufactured thin films was investigated using x-ray diffraction (xrd). the most visible lithium titanate...
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Preparation of porous TiO2 films by means of pulsed laser deposition for photocatalytic applications
PublicationIn this work the preparation and structure properties of porous thin films of TiO2 were investigated. The films were produced by means of the pulsed laser deposition technique using laser pulses at 266nm (10Hz) and at fluencies of 1-3.5J/cm2. The process was performed in vacuum using O2 buffer gas and films were deposited on the SiO2 glass or Si substrate. X-ray diffraction (XRD) and Raman analysis of the structure and chemical...
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Superconducting properties of vn-sio 2 sol-gel derived thin films
Publicationin this work studies of structure and superconducting properties of vnsio2 films are reported. the films were obtained through thermal nitridation (ammonolysis) of solgel derived v2o3sio2 coatings (in a proper v2o3/sio2 ratio) at 1200 ◦c. this process leads to the formation of disordered structure with vn metallic grains dispersed in the insulating sio2 matrix. the structural transformations occurring in the lms as a result...
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In-plane and out-of-plane temperature dependencies of the resistivity in single crystals and films of Nd2CuO4
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The Effect of Citric Acid on Physicochemical Properties of Hydrophilic Carboxymethyl Starch-Based Films
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Influence of cellulose fibers on physicochemical properties of biodegradable films based on polysaccharide derivatives
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Effect of Melanin on the Stability of Casein Films Exposed to Artificially Accelerated UV Aging
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Properties of PEEK-supported films of biological substances prepared by the Langmuir-Blodgett technique
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On electrical and photoconductive properties of mixed Nb2O5/TiO2 sol-gel thin films
PublicationPraca prezentuje wyniki przewodnictwa elektrycznego i fotoprzewodnictwa cienkich warstw TiO2 i Nb2O5/TiO2 otrzymanych metodą zol-żel. Pomiary przeprowadzono w funkcji temperatury i natężenia oświetlenia zarówno w próżni jak i w powietrzu. Struktura warstw została zbadana metodami XRD oraz AFM. W pracy zaobserwowano zaobserwowano spadek fotoprzewodnictwa wraz z zawartością Nb2O5
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Intensification of luminescence of Europium-EDTA complex in polyvinyl pyrrolidone films by copper nanoparticles
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Fluctuation-enhanced and conductometric gas sensing with nanocrystalline NiO thin films: A comparison
PublicationNanocrystalline thin films of NiO were prepared by advanced reactive gas deposition, and their responses to formaldehyde, ethanol and methane gases were studied via fluctuation-enhanced and conductometric methods Thin films with thicknesses in the 200–1700-nm range were investigated in as-deposited form and after annealing at 400 and 500 °C. Morphological and structural analyses showed porous deposits with NiO nanocrystals having...
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Self-Organization of Graft Copolymers and Retortable iPP-Based Nanoporous Films Thereof
PublicationPolyolefins might become inexpensive alternatives to the existing membranes based on polyethersulfone. Here we disclose the production of retortable, well-defined PP-based nanoporous membranes derived from amphiphilic graft copolymer precursors. The graft copolymers, containing a polypropylene backbone and polyester grafts, were obtained by grafting lactones, specifically δ-valerolactone and ε-caprolactone, from well-defined randomly...
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Properties of ordered titanium templates covered with Au thin films for SERS applications
PublicationtCurrently, roughened metal nanostructures are widely studied as highly sensitive Raman scattering sub-strates that show application potential in biochemistry, food safety or medical diagnostic. In this workthe structural properties and the enhancement effect due to surface enhanced Raman scattering (SERS) ofhighly ordered nano-patterned titanium templates covered with thin (5–20 nm) gold films are reported.The templates are formed...
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Nanostructuring of thin Au films deposited on ordered Ti templates for applications in SERS
PublicationIn this work the results on thermal nanostructuring of the Au films on Ti templates as well as morphology and optical properties of the obtained structures are reported. The bimetal nanostructures are fabricated in a multi-step process. First, the titania nanotubes are produced on the surface of Ti foil by anodization in an ethylene glycol-water solution containing fluoride ions. This is followed by chemical etching in oxalic acid...