Materials Literature
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Natural polyhydroxyalkanoates (PHAs) and their synthetic analogs are widely used in medicine, including the production of biodegradable medical devices (prostheses, patches, stents, and plugs) intended for regenerative intestinal surgery. The possibility of biosynthesis and biodegradation of PHAs, primarily, their mos…
Abstract—Temperature dependence of attenuation of magnetic spin precession in two-layer structures with a Pt top layer based on a La0.7Sr0.3MnO3 (LSMO) epitaxial manganite film is studied by measuring the width of a ferromagnetic resonance (FMR) line. Ferromagnetic resonance in thin ferromagnetic manganite films is us…
Abstract Stainless steel is a ubiquitous structural material and one that finds extensive use in core-internal components in nuclear power plants. Stainless steel features superior corrosion resistance (e.g., as compared to ordinary steel) due to the formation of passivating iron and/or chromium oxides on its surfaces…
This paper describes the results of an experimental study of ignition and combustion of condensed systems, containing energy fillers, i.e., powders of aluminum, boron, aluminum borides, and titanium. Compositions on a hydrocarbon or active fuel binder with a combined oxidizer (ammonium perchlorate and/or ammonium nitr…
Polyaniline (PANI)-reduced graphene oxide (rGO) based transparent counter electrodes have been fabricated for dye sensitized solar cells as an alternative to the expensive platinum (Pt) counter electrodes. Here, the graphene oxide (GO) added during the polymerization of PANI will subsequently reduce to rGO. The concen…
ABSTRACT Semicrystalline polymers are often used as macromolecular excipients in active pharmaceutical ingredient (API)‐delivery systems. In such systems, the morphological structure and crystalline characteristics of the excipient have a direct impact upon the drug‐delivery rate. In this study, polycaprolactone (PCL)…
The dynamics of a self-rewetting drop on a uniformly heated, inclined substrate are considered. Based on the lubrication theory and Navier slip condition, an evolution equation for the drop thickness of a two-dimensional drop is established. The migration characteristics of the drop are investigated when the interfaci…
Abstract— The behavior of magnesium octa[(4'-benzo-15-crown-5)oxy]phthalocyaninate (Mgcr8Pc) in aqueous micellar solutions of alkyltriphenylphosphonium bromides (CnTPPBs), where n = 8, 12, 14, and 16, has been studied by means of electronic absorption spectroscopy and measurements of fluorescence photophysical charact…
The properties of poly(3,4-ethylenedioxythiophene) (PEDOT) films were studied electrochemically at high positive potentials (from–0.3 to 1.5 V relative to the Ag/AgCl electrode). A cyclic voltammetry (CV) study revealed the range of potentials (up to 1.3–1.5 V) where the cycling leads to significant changes in the ele…
Abstract Proteinase K solutions have been investigated by small-angle X-ray scattering in the temperature range of 10–30°C under conditions of tetragonal crystal growth. Addition of ammonium sulfate or sodium nitrate as precipitants is shown to induce the formation of a significant fraction of protein dimers in soluti…
Direct numerical simulations (DNS) of knitted textile mechanical behavior are for the first time conducted on high performance computing (HPC) using both the explicit and implicit finite element analysis (FEA) to directly assess effective ways to model the behavior of such complex material systems. Yarn-level models i…
Abstract Surface-enhanced spectroscopy (SES) techniques, including surface-enhanced photoluminescence (SEPL), Raman scattering (SERS) and infrared absorption (SEIRA), represent powerful biosensing modalities, allowing non-invasive label-free identification of various molecules and quantum emitters in the vicinity of n…
A ferrite in the Sr 2 Tl 2 O 5 -type MFe 3 O 5 family with M = Co has been synthesized at 12 GPa pressure. Neutron diffraction shows the sample to be Co deficient with composition Co 0.6 Fe 3.4 O 5 . The Co/Fe cation distribution is found to be profoundly different from those of MFe 3 O 5 analogs and lies between norm…
Acoustic cloaking is an intriguing phenomenon that has attracted lots of attention. The required inhomogeneous and anisotropic properties of acoustic cloaks derived with transformation acoustics make them difficult to realize. In this paper, a new mapping relation is presented. An acoustic cloak can be divided into an…
TbCo 2 Mn x ( x ≤ 1) alloys were synthesized and their crystal structure, heat capacity, magnetic and magnetocaloric properties were studied. Single-phase compounds with the MgCu 2 -type structure were formed at х < 0.4. In alloys with х > 0.4, additional phases with the PuNi 3 - and Th 6 Mn 23 -type structures form.…
Mesoporous silica nanoparticles are synthesized in the presence of ethanol as a co-solvent and different temperatures by the sol-gel process. The spherical mesoporous silica nanoparticles are obtained at 50 C in presence of 1 ml ethanol. Increasing the reaction temperature with constant amount of ethanol from 30 C to…
Abstract—The results of development of new nickel-base superalloy having an operating temperature up to 800°C for gas turbine disks have been presented. Structures, mechanical properties, and phase transformations of six experimental compositions have been researched. Physical and chemical modeling has been used to ma…
Abstract The corrosion behavior of mild steel (MS) in 5% NH2SO3H solution in the nonexistence and existence of aqueous extract of Juniperus was investigated using mass loss (ML), potentiostatic polarization (PP), AC electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM) techniques. It…
To study the effects of the main and side chains on the physical properties of polyesters containing anthraquinone substituents, two types of 1,5-dihydroxy-2,3,6,7-tetraalkoxyanthraquinones (DHTAAQs) were prepared from gallic acid, a major component of hydrolyzable tannins, and polymerized with five dicarboxylic dichl…
The poor sulfur tolerance of conventional nickel cermet anodes is particularly concerning for solid oxide fuel cell technology. Herein, we report an innovative anode composed of a samaria-doped ceria (SDC) scaffold and a perovskite La 0.35 Ca 0.50 TiO 3−δ thin film with a surface modified with strongly coupled and in…