Materials Literature
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In this study, we demonstrate that 2-microm-sized Ag (microAg) powders can be used as a core material for constructing molecular sensing/recognition units operating via surface-enhanced Raman scattering (SERS). This is possible because microAg powders are very efficient substrates for both the infrared and Raman-spect…
Abstract Long‐chain branched polyethylenes are still of great interest today. In some cases their characterization is not an easy task with classical analytic methods (GPC‐MALLS and NMR) because of the limited sensitivity at low concentrations of long‐chain branches. Rheological methods make a valuable contribution to…
The multiple pharmacological actions of a unique compound are a prerequisite for classifying drugs as highly efficacious, because the multiple pharmacological actions offer the possibility of treating various symptoms of chronic diseases as described below. 1) Sustained hyperglycemia induces macrovascular and microvas…
Purpose To investigate the properties of coatings containing various types of fillers from the point of view of their physical‐mechanical properties and anticorrosive properties. Design/methodology/approach Research used fillers of different types varying in morphology and/or chemical composition; these were then comp…
Vascular smooth muscle cells (SMCs) populate in the media of the blood vessel, and play an important role in the control of vasoactivity and the remodeling of the vessel wall. Blood vessels are constantly subjected to hemodynamic stresses, and the pulsatile nature of the blood flow results in a cyclic mechanical strai…
Differences have been observed between the lifetimes of the metastable phases of undercooled samples of Fe–12 wt% Cr–16 wt% Ni alloy which had been subjected to electromagnetic levitation (EML) and electrostatic levitation (ESL). Internal flow is induced within the samples by positioning forces in EML and much weaker…
The durability of textured transparent conductive oxide (TCO) thin films against atomic hydrogen was investigated. An ultrathin TiO 2 layer of 2 nm thickness was deposited on textured fluorine-doped tin oxide (SnO 2 :F) films, successively by atmospheric pressure chemical vapor deposition (AP-CVD). TCO films with a Ti…
Poly(3-hydroxybutyrate) (PHB) is synthesized from 3-hydroxybutyryl-CoA by polyhydroxyalkanoate synthase and hydrolyzed by PHB depolymerase. In this study, we focused on the reverse reaction of polyhydroxyalkanoate synthase, and propose the possibility that PHB can be degraded through a novel process, that is thiolysis…
Ferroelectric materials have been widely investigated for high density dynamic random access memories, opto-electrics, and tunable microwave devices due to their properties. In this study, we have investigated the dielectric properties of Ti doped <TEX>$K(Ta,\;Nb)O_3$</TEX> thin films. By doping Ti Into the <TEX>$K(Ta…
# Introduction: # Historical Background to Polymer Physics and Description of Polymer Physics Areas # Chain Statistics: # The Chain Character of Polymers Modeled on Probability Considerations, Lattice Theory of Blending Polymers # Thermodynamics: # Classical and Statistical Thermodynamic Models Applied to Polymers # O…
Polarized Raman scattering and infrared reflectivity measurements have been used to investigate the crystal structure of Czochralski-grown NaLaF4 single crystals. The phonon symmetries, the simultaneous presence of polar modes in the infrared and Raman spectra, as well as the observation of piezoelectric resonance, he…
Effects of an uniaxial compressive pre-stress on the dielectric properties of normal and relaxor ferroelectric ceramic composites in BT-PZT and PMN-PZT systems are investigated. The dielectric properties are observed under the compressive pre-stress levels up to 15 and 5 MPa for BT-PZT and PMN-PZT, respectively, using…
The objective of the present chapter1 is to provide the basic concepts and tools required to understand the inception and development of cavitation in liquid flows. The influence of various parameters as the boundary layer and nuclei content is discussed. A special attention is given to thermal effects which may signi…
Abstract Photoconductivity of ZnO single crystals grown by a hydrothermal method for ultraviolet light was measured. The ZnO single crystals have photo response in a range of wavelengths shorter than 380 nm. O‐faces of ZnO single crystals of the c ‐plane showed higher photocurrents and wider spectral response than did…
A process for deposition of silicon oxycarbonitride films from poly(urea)methyl vinyl silazane (PUMVS) by spin coating precursor solutions onto a substrate, followed by polymerization, cross‐linking and pyrolysis has been developed. The cross‐linked polymer films (350 nm thick), deposited on variety substrates (e.g.,…
O estudo e aplicação de poliésteres bioreabsorvíveis para reparar tecidos danificados tem se mostrado uma área de pesquisa muito promissora. Poli (L-ácido láctico), PLLA, se destaca dentre os poliésteres bioreabsorvíveis, em função de características como biocompatibilidade e bioreabsorção. No entanto, seu alto custo…
The potential of active brazing filler metal modification by ceramic particle addition, with the aim of reducing the stresses in ceramic‐metal joints is studied. A layered braze structure is proposed: layers of reinforced and un‐reinforced filler are combined in an optimal manner to minimize residual stress. The joint…
The Eu3+-doped zinc oxyfluorotellurite (TZLFE) glass of molar composition 59TeO2–20ZnO–20LiF–1Eu2O3 has been prepared and studied by broadband, Raman, and fluorescence-line narrowing (FLN) spectral techniques to investigate the local environments of Eu3+ ions in this glass. From the vibronic spectra, different TeO gro…
The lanthanide-doped GdF3nanoparticles have been produced by a simply hydrothermal synthesis procedure. The excitation and emission spectra of the Eu3+-doped GdF3nanoparticles showed that the excitation energy of Gd3+is efficiently transferred to Eu3+in the Eu3+-doped GdF3nanoparticles. Due to very low phonon energies…
Nylon-6 fibers with average diameters below 500 nm were electrospun onto conventional air filter media at varying weight coverage levels using a multi-nozzle bank. The initial filtration efficiency of the air filter media was improved significantly with increasing coverage level and decreasing size of nylon-6 fibers.…