Materials Literature
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Local drug release has many benefits – a steadier distribution, improved compliance, but most importantly it allows the convenient use of protein based molecules as therapeutic agents. Many different types of materials have been studied as drug carriers, including sol-gel derived SiO2 matrices. In this study lysozyme…
The synthesis, and the optical and electrochemical properties, of a series of mesitylthio (MesS-) end-capped bis(oligothienyl) sulfides are presented. The target compounds were synthesized principally by convergent protocols, whereby a series of short thiophene oligomers bearing one terminal mesitylthio (MesS-) substi…
Zinc oxide (ZnO) was used as a buffer layer in the fabrication of polymer solar cells with the configuration of ITO/PEDOT:PSS/P3HT:PCBM/ZnO/Ag, in which the Ag cathode was prepared by inkjet printing using silver ink. Due to the hydrophobic nature of the P3HT:PCBM active layer surface, the hydrophilic silver ink canno…
The electronic structure of La1−xSrxScO3 single crystal has been studied by x-ray absorption spectroscopy (XAS). The conduction band is mainly composed of Sc 3d state hybridized with O 2p state. The O 1s XAS spectrum exhibits the existence of the Sc 3d-defect-induced state under the Sc 3d conduction band. The intensit…
This paper presents results of a technique developed to measure the volume and the surface area of flaws in pin-type polymer insulators used in electrical energy distribution networks by means of computed tomography (CT). The tomography images were reconstructed using 180 digital radiographs (projections) acquired fro…
The present paper investigates the tensile behaviour of alloy 718 sheets processed after electron beam welding (EBW). The alloy 718 sheets were pretreated in three conditions: as received, solution and precipitation pretreatments. Metallographic and fractographic examination on the specimens were conducted with optica…
The electrical properties of carbon nanotube FETs (CNTFETs) have been studied in detail. The conduction type of the CNTFETs was dependent on the work function of the contact metal, which suggests that Fermi level pinning at the metal/nanotube interface is not strong. Chemical doping using F4TCNQ was found to be effect…
Highly (002)-oriented nanocrystalline ZnO thin films were deposited on glass substrates at a substrate temperature of 500°C in air atmosphere by low-cost spray pyrolysis method. Room temperature photoluminescence spectral studies show the presence of near band edge emission and defect level emission (DLE) from the sam…
Biotin/silole-derivatized distributed Bragg reflectors porous silicon (DBR PSi) smart particles for the detection of streptavidin have been developed. DBR PSi fabricated by applying a computer-controlled periodic square current waveform was prepared for the application as a label-free biosensor based on PSi interferom…
Dechanneling of accelerated ions as a result of interaction with atoms incorporated into the cavities of carbon nanotubes (CNTs) is considered. The Chapman-Kolmogorov kinetic equation describing this process is constructed and solved, and analytical formulas for the length of particle dechanneling from CNTs are obtain…
Flexible rugate porous silicon (PSi)/polystyrene composite films were prepared for the possible use of a tunable band-rejection filter. Rugate PSi was generated by applying a computer-generated pseudo-sinusoidal current waveform through an electrochemical etching. A composite waveform of current density containing two…
The magnetotransport and magnetic properties of La 1 − x Ca x MnO3 polycrystalline samples (x = 0–0.3) annealed under vacuum and in the oxygen environment are investigated in the temperature range from 77 to 400 K. The magnetic studies of lightly doped manganites reveal persistence of short-range magnetic order up to…
Hydroxyapatite (HAp) sensor, available for quartz crystal microbalance with dissipation (QCM-D) technique, has been fabricated by an electrophoretic deposition method. The method of re-usability of the sensor after adsorption of fibrinogen and the biological apatite (BAp) growth on the sensor with and without the adso…
The chemical composition of ikunolite and the distribution of Se among various sulfides and sulfosalts at Redziny, in the metamorphic cover of the Variscan Karkonosze pluton, in Lower Silesia, Poland, have been documented by electron-microprobe analysis. At Redziny, selenium becomes concentrated at the lower-temperatu…
Au nanorods have been successfully synthesized at 90C by using hexadecyltrimethylammonium bromide (CTAB) and benzyldimethylammoniumchloride hydrate (BDAC) co-surfactant. At 90C, the reaction time was less than 10 s, and the longitudinal surface plasmon absorption band could vary between 680 and 770 nm by adjusting the…
The analytic mean field potential approach is applied to -, -, and -Si 3 N 4 . The analytic expressions for the Helmholtz free energy, internal energy, and equation of state were derived. The formalism for the case of the Morse potential is used in this work. Its six potential parameters are determined through fitting…
Hydrophobie und Porengröße: Bei der Bildung von nanostrukturierten TiO2-Filmen wirken dendritische amphiphile Kern-Doppelschale-Makromoleküle mit einer hydrophoben Polystyrol(PS)-Innenschale und einer hydrophilen Polyacrylsäure(PA)-Außenschale als Template (siehe Bild). Die Porengröße der Filme lässt sich einstellen,…
Selected organic and inorganic nitrogen sources were evaluated for growth of Pseudomonas putida PGA1 and its production of medium-chain-length poly-(3-hydroxyalkanoates) (PHA MCL ). The effect of these nitrogen sources on the cells growth, PHA MCL yield, monomer composition and molecular weight when this bacterium was…
A new mineral species, niveolanite, the first natural carbonate of beryllium, was found in the Poudrette pegmatite, Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada. It is associated with albite, aegirine, natrolite, gonnardite, siderite, petersenite-(Ce), franconite, dawsonite, analcime, quartz, eudidymite, catap…
In the tight-binding approximation, we take into account the next-nearest-neighbor hopping in graphene that leads to nonrelativistic-like corrections in its low energy spectrum. The electronic density of states in a magnetic field is found and the fan diagram is plotted, which interpolates between those for the relati…