Materials Literature
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γ-ray irradiation effects on ferroelectric properties of (Bi0.85Pr0.15)(Fe0.95Mn0.05)O3 (BPFMO) thin films are investigated by pizeoresponse force microscopy and polarization–voltage hysteresis measurements. The irradiated BPFMO thin-film capacitors show reduced polarizations and imprinted hysteresis loops. The loss o…
Silver doped polyaniline phosphotungstate (PANI-PW/Ag) composite was synthesized sol-gel method and treated with silver nitrate resulting silver doped PANI-PW/Ag. Physicochemical characterization of PANI-PW/Ag was carried out by scanning electron microscopy and Fourier transform infrared spectroscopy (FT-IR). Electric…
A novel polymer membrane (TPP‐M) with strong light harvesting ability within the entire visible‐ light spectrum has been prepared, in which the meso‐tetrakis(4‐cyanophenyl) porphyrin (TPP‐1) as a functional unit is highly crosslinked through an aromatic nitrile trimerization reaction. The designed triazine framework c…
A new method to prepare single-polymer high-density (HDPE)-ultra high molecular weight polyethylene (UHMWPE) fiber (PE-PE homocomposites) composed and also PE-PE homocomposites containing HDPE organo montmorillonite clay (OMMT) nanocomposites as a matrix (PE nanohomocomposites) was used. Owing to the major importance…
Impedance spectroscopy was utilized to investigate the dielectric properties, ac conductivity and charge transport mechanisms in propylene-alt-CO/ethylene-alt-CO (EPEC) random terpolymer filled wit...
Addition of minor elements to a base alloy is often applied with the aim of mitigating void swelling by decreasing the vacancy diffusivity and flux which influence vacancy accumulation behavior. However, the comparative evaluations of parameters, such as the diffusivity and flux, between a base alloy and modified allo…
The use of biomaterial carriers to improve the therapeutic efficacy of stem cells is known to augment cell delivery, retention, and viability. However, the way that carrier clearance kinetics boosts stem cell delivery and impacts stem cell function remains poorly characterized. In this study, we designed a platform to…
The water absorption characteristics of polyester matrix hybrid composites reinforced with oil palm ash and oil palm fiber have been investigated. Open moulding method was used to produce polyester hybrid composites of 2, 4, and 6 wt% reinforcement consisting of oil palm ash (OPA) and oil palm fiber (OPF) in weight ra…
The metastable zone width (MSZW) of SrCl2·6H2O during cooling crystallization was determined by the focused beam reflectance measurement (FBRM). The effects of the saturation temperature, cooling rate, stirring rate, and Ca2+ ion impurity on the MSZW were investigated. The MSZW increased with the increase in the cooli…
A study on the fine structure of the genus Achnanthes species (Bacillariophyceae) is carried out at 92 stations for taxonomic purposes from January 2009 to April 2013 in Korean marine water, freshwater and brackish water. Twelve Achnanthes species are identified based on a variety of taxonomic characters by means of l…
In the last sixty years the understanding of the mechanisms of alternating current electroluminescence (ACEL) in transition metal-doped zinc sulfides, in particular ZnS:Cu particles has been the goal of all workers in the field. An in depth understanding of the crystallography and uncommon hemimorphic nature of these…
Spray drying was used to produce redispersible polyacrylate powder (RPP) from polyacrylate latex particles with a soft-core/hard-shell configuration. The optimal pretreatment parameters were determined by investigating the effects of the contents of silica sol and the protective colloid, polyvinyl alcohol (PVA), the v…
ABSTRACT The complete adaxial surface development and degradation due to weathering of two superhydrophobic leaf species with (black locust, Robinia pseudoacacia and bigtooth aspen, Populus grandidentata) and one without (quaking aspen, Populus tremuloides) a protective downy layer of trichomes was followed over one e…
Remarkable diversity of diatom taxa occurs in intertidal sand-flats of the Nakdong River estuary, one of the most dynamic and productive ecosystem in Korea. Benthic diatoms were collected from the sandy sediments to clarify the taxonomic accounts and distribution of the old genus Navicula, i.e., the naviculoid flora.…
Particles with functional groups on their surface were immobilized on premade cryogels through covalent bonding to maximize the accessibility of the target molecules to the surface of the particles. The physical properties of the composite cryogel were characterized by SEM, texture analysis and nitrogen adsorption. Di…
Abstract The NIR and IR spectroscopic properties of the cyanide‐bridged complex, trans‐[Ru(dmap)4{(μ‐CN)Ru(py)4Cl}2]3+ (py=pyridine, dmap=4‐dimethylaminopyridine) provide strong evidence that this trimetallic ion behaves as a Class III mixed‐valence species, the first example reported of a cyanide‐bridged system. This…
A series of starch‐g‐poly(2‐acryloyloxyethyl trimethyl ammonium chloride) (starch‐g‐PATAC) samples with different grafting ratios was prepared via the graft copolymerization of acid‐thinned granular corn starch with 2‐acryloyloxyethyl trimethyl ammonium chloride (ATAC) in aqueous medium using Fe2+–H2O2 initiator. The…
We synthesized cyclic tetrathioesters containing thioester moieties at the o-position (o-CTE) and m-position (m-CTE) of an aromatic skeleton. The reaction of phenoxy propylenesulfide (PPS) with o-CTE and m-CTE was examined using tetrabutylammonium chloride as a catalyst in 1-methyl-2-pyrrolidinone, yielding the corres…
Here, we analyze the crystal structures of three new Bi/M oxophosphates, focusing on the ambiguity between order and disorder in different structural subunits. The three structures are original but systematically built on the assembly of O(Bi,M)4 tetrahedra into various 1D-oxocenterd units, separated by PO4 groups tha…
CuO/Cu(OH)2 nanostructures composed of hierarchical two-dimensional (2D) nanosheets and spherical architectures constructed by ultrathin nanowalls in thickness were generated by simply immersing copper foil substrate into air, DI water, and 20 mM NH4OH solution at 25°C. The presence of hydroxyl groups in ammonia bath…