Materials Literature
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This paper is focused on Ba 1-x Sr x ( Ce 0.75 Zr 0.25 ) 0.9 Nd 0.1 O 2.95 proton-conducting oxides, for which the effect of substitution of barium by strontium in a full range of compositions is studied. Crystal lattice symmetry, proton conductivity and stability in CO 2 atmosphere are discussed. Substitution of bari…
The solubilites of 5,10,15,20-tetrakis( p -chlorophenyl)porphyrin (abbreviated in p -ClTPP) in binary propionic acid-rich propionic acid + water solvent mixtures from (293.2 to 353.2) K were measured. The effects of mass fraction of propionic acid from (0.80 to 1.00) in propionic acid + water mixtures on the solubilit…
ABSTRACT The defense mechanism of crops associated with the use of polymeric nets and fabrics is only physical and, hence, ineffective against the bacterial contaminations. The presence of an antibacterial agent associated with the use of conventional agro‐textiles can represent a great advantage in the prevention of…
The alkyl groups in 2-(dialkylamino)- and 2,7-bis(dialkylamino)perfluorophenazines drastically affected the melting point and solid-state fluorescence. 2-(Dialkylamino)- and 2,7-bis(dialkylamino) derivatives such as 2-(dioctylamino)-, 2-(didodecylamino)-, and 2,7-bis(dioctylamino)perfluorophenazines were liquid at amb…
A computational investigation is carried out on a calix[4]arene based tetraradical and a similar hexaradical with and without bis(biphenylene)methyl substituent(s). The dimeric forms of these radicals are studied with aromatic groups replaced by hydrogen atoms. We use the B3LYP/6-31G(d,p) scheme for optimization and t…
Unusual chronological electrical resistance change behavior was investigated for amorphous GeCu2Te3 phase change material. More than a 1 order decrease of electrical resistance was observed in the air even at room temperature. The resistance of the amorphous film gradually increased with increasing temperature and the…
The H 2 O formation reaction from H 2 on O-rich RuO 2 (110) was studied by temperature-programmed desorption and reaction (TPD/TPR) and scanning tunneling microscopy (STM) measurements and density functional theory (DFT) calculations. On the one hand, following H2 adsorption at 270 K, our TPD/TPR measurements reveal t…
In this paper we report thermally stimulated depolarization current results on the chain and segmental dynamics of two monodisperse polyisoprenes accessing both dynamics at ultralow frequency range and exploring the relationship between segmental and chain time scales when crossing the glass transition. In this range,…
A hygiene mask covers the wearer’s nose and mouth to prevent exposure to viruses, pollen, dust, and so on. To produce the anticipated effect of wearing a mask, it is important to develop a mask with high fitting performance while closing and opening the mouth. Moreover, masks are to be used by individuals as well as m…
In this study, we present the synthesis of a carbazole-bridged porphyrin dimer system that possesses a 90° change in orientation between porphyrin units and the single-product four dimer macrocycle, which is formed upon self-assembly of the dimer via imidazolyl-to-zinc complementary coordination. Subsequent characteri…
In this paper, a blend of epoxy resin and epoxidized palm oil (EPO) was prepared to investigate its mechanical properties. Epoxy and EPO were mixed for 20 minutes at room temperature before mixed with hardener and followed by curing for 2 hours at 100 °C. Tensile, flexural and impact tests were conducted to characteri…
Molecular simulation techniques have revealed that the incorporation of fullerenes within porous aromatic frameworks (PAFs) remarkably enhances methanol uptake while inhibiting water uptake. The highest selectivity of methanol over water is found to be 1540 at low pressure (1 kPa) and decreases gradually with increasi…
We present a detailed local probe study of the magnetic order in the oxychalcogenide ${\mathrm{La}}_{2}{\mathrm{O}}_{2}{\mathrm{Fe}}_{2}{\mathrm{OSe}}_{2}$ utilizing $^{57}\mathrm{Fe}$ M\"ossbauer, $^{139}\mathrm{La}$ NMR, and muon-spin relaxation spectroscopy. This system can be regarded as an insulating reference sy…
The hierarchically nanosheet-assembled NiCo@SiO2@Ag (NSA) core-shell microspheres have been synthesized by a layer-by-layer procedure at ambient temperature. The mean particle size of NSA microspheres is about 1.7 μm, which is made up of some nanosheets with an average thickness of ∼20 nm. The outer silver shell surfa…
Self-nucleation (SN) behavior is one of the most fascinating behaviors of semicrystalline polymers; it is of great scientific and practical importance. In this study, the crystallization and melting behavior of a series of controlled-rheology polypropylene (CRPP) with different molecular weights were studied by differ…
The sodium ion-triggered extension and contraction motions along with photo-induced <italic>cis</italic> – <italic>trans</italic> isomerisation of a photoresponsive spiroborate-based double-stranded helicate were investigated.
Plasma electrolytic oxidation (PEO) is a promising and environmentally friendly surface treatment based on electrolytic conversion that forms a protective ceramic oxide coating on light alloys. The PEO coating provides excellent corrosion and wear resistance to the substrate and, as such, is being considered for wider…
A highly ordered Ag nano-crown array with a hierarchical pattern is designed as a three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrate. It was achieved by depositing Ag on a patterned polymethyl methacrylate (PMMA) film which precisely replicates the patterns of a honeycomb-like anodic aluminum ox…
A conventional but simple fabrication technique of activated carbon/graphene (AC/G) supercapacitor electrode will be presented in this work. The AC/G electrode was prepared using slurry technique from the mixture of AC and graphene powders, polytetrafluoroethylene as binder and N-methylpyrrolidone as solvent. The AC/G…
ABSTRACT Sulfur can be used as crosslink coagent in unsaturated elastomer. In this work, a fully saturated HNBR with 39 wt % nitrile content was selected to investigate the effect of a small amount of sulfur acting as crosslink coagent on the physical and mechanical properties of peroxide‐cured vulcanizates. First, se…