Materials Literature
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A facile precipitation reaction without using any surfactants or templates has been employed to prepare SrSO4 microcrystals from 0-dimensional (0-D) particles to 1-D rods and 3-D dendrites. Especially, flower-like SrSO4 microcrystals with sizes of about 8 μm can be obtained under ambient conditions at room temperature…
Ferromagnetic iron nanofibres with diameters around 120 nm were prepared by electrospinning the polyvinyl pyrrolidone (PVP)/Fe(NO3)3 sol–gel solution and subsequent heat treatment. Two different heat treatments were carried out. One is heating the precursor nanofibres at 700°C for 2 h in hydrogen atmosphere directly (…
Preface Borophosphates: Synthesis, Structure, Acid Characteristic, & Catalytic Activity Laser-Assisted Deposition of Boron Nitride Thin Films & Nanotubes Hexagonal BN: Chemical & Structural Effects on K-Shells Excitation: X-Ray Polaroid Effect Boron in Higher Plants The Influence of the Borane Reagent Structures on Ca…
The hydrogen release rate of thermal decomposition, after the melting, for the borohydride of lithium (Li), sodium (Na), and calcium (Ca) and their boron mixtures, at selected molar ratios, is investigated under 1 bar hydrogen pressure and nonisothermal conditions. The reaction is studied by means of manometric measur…
Silver sulphide nanoparticles were synthesised by the reaction of silver nitrate and thioacetic acid by a sonochemical method. The as-synthesised nanoparticles, with an average size of ∼11.8 nm, were characterised by X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy, Fourier transform inf…
Acetate kinase (AckA) catalyzes the reversible transfer of a phosphate group from acetyl phosphate to ADP, generating acetate and ATP, and plays a central role in carbon metabolism. In the present work, the gene corresponding to AckA from Salmonella typhimurium (StAckA) was cloned in the IPTG-inducible pRSET C vector,…
Ternary libraries of 64 ZnO/CuO/CuCl(2) impregnated activated carbon samples were prepared on untreated or HNO(3)-treated carbon and evaluated for their SO(2) and NH(3) gas adsorption properties gravimetrically using a combinatorial method. CuCl(2) is shown to be a viable substitute for HNO(3) and some compositions of…
Substantial elastic softening in the cubic phase of PZN-PT relaxor ferroelectric crystals is observed as a large hysteresis between the RUS frequencies from poled and depoled crystals. This is due to static switchable polar nanoregions (PNR) at $T$*, well below the conventional Burns temperature but \ensuremath{\sim}5…
Swing bridge: The triplet species ethenedithione has been generated within the coordination sphere of cobalt, leading to a dinuclear μ-η(2)-η(2)-C(2)S(2) complex (see picture: C gray, Co blue, P purple, S yellow). Depending on the solvent, the C(2)S(2) moiety displays a transoid or a cisoid geometry. This isomerizatio…
The interaction of aqueous H2PtCl6 solutions with hydrotalcite-type aluminum-magnesium hydroxides differing in the nature of their interlayer anion is reported. In the case of CO 3 2− as the interlayer anion, the introduction of the platinum(IV) chloro complex does exerts no significant effect on the structural proper…
The present study aims to identify the effect of sintering atmosphere [O 2 , 75N 2 -25 H 2 (mol%) and H 2 ] on microstructural evolution at the relatively low sintering temperature of 1040 o C. Samples sintered in O 2 showed a bimodal microstructure consisting of fine matrix grains and large abnormal grains. Sintering…
The quantum-cutting process is observed in nanocrystalline fluoride (NaYF(4)) doped with Pr(3+). The thermal decomposition synthesis method was used to synthesize the NaYF(4) nanocrystals with an average size of 42 nm. The morphological high resolution transmission electron microscopy (HRTEM), structural X-ray diffrac…
Abstract The main objective of this research was to synthesize a new compatibilisant agent (PVC‐g‐MA), which was grafted from the maleic anhydride on the PVC chains. The presence of maleic anhydride grafting on PVC was made evident by infrared analysis. PVC‐g‐MA was used like compatibilisant to solve the problem of th…
In this work, the yttrium oxide( $Y_2O_3$ ) thin films as the buffer layer were prepared by the simple solution coating and reel-to-reel process on an unpolished metal tape substrate. The $Y_2O_3$ thin films were successfully synthesized by the hydrolysis of yttrium acetate. We have studied the improvement of surface…
전기방사법을 이용하여 폴리(비닐 알코올)(poly(vinyl alcohol), PVA)/수분산 폴리우레탄(waterborne polyurethane, WBPU)/montmorillonite clay(MMT) 나노복합섬유를 제조하고 특성을 분석하였다. Scanning electron microscopy(SEM), transmission electron microscopy(TEM), X선 회절, thermal gravimetric analyzer(TGA) 의 분석장비들을 이용하여 제조된 나노복합섬유의 형태와 구조적, 열적특성을 확인한 결과, 평균직경이 600∼900 n…
Polyvinyl alcohol (PVA)-stabilised silver nanoparticles have been synthesised by the simple reduction process at different temperatures ranging from 60 to 90°C. The as-synthesised silver nanoparticles were analysed by X-ray diffraction (XRD), energy-dispersive analysis of X-rays, transmission electron microscope, UV–v…
Density functional theory is used to study the redispersion of clusters of one to six Au atoms by 1,3,5-tris(phenylthio)benzene (TPB) on the Au(111) surface. The adopted computational scheme PBE+dispersion is first assessed by comparison with available experimental (cohesive properties of gold) and CCSD(T) results (ga…
Automatisierte Beugungstomographie wurde verwendet, um die Kristallstruktur von ECS-3, dem ersten kristallinen organisch-anorganischen Alumosilicat mit offener Porenstruktur, zu lösen. Die Struktur besteht aus Alumosilicatschichten, die durch eine reguläre Anordnung von Phenylenringen vernetzt sind (siehe Bild; Al tür…
Abstract Molecular dynamics is used to simulate the film growth process of zinc oxide (ZnO) deposited on a ZnO substrate. In the work, the Buckingham-type interatomic potential is modelled to describe the interaction of Zn–O atoms. The effects of incident energy and substrate temperature on the layer coverage function…
We report kinetics measurements for the adsorption of methane, ethane, propane, butane, and pentane on close-ended single-walled carbon nanotube bundles. The measurements were conducted by monitoring the adsorption equilibration times. For methane and ethane, equilibration times were found to decrease as the fractiona…