Materials Literature
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The process of self-assembly spontaneously creates well-defined structures from various chemical building blocks. Self-assembly can include different levels of complexity: it can be as simple as the dimerization of two small building blocks driven by hydrogen bonding or as complicated as a cell membrane, a remarkable…
The two-dimensional equilibrated grain boundary grooves (GBG) of succinonitrile (SCN) was directly observed by using a temperature gradient stage with high temperature stability to measure the solid-liquid interfacial free energy and its anisotropic factor. Based on the numerical solution of Gibbs-Thomson equation and…
Hybrid two-dimensional nanocomposites of transition metal semiconductors based on molybdenum disulfide, zinc oxide, and vanadium pentoxide, in which ultra-thin sheets of the inorganic component are stabilized by insertion into a bilayer of organic amphiphiles, are described. The resulting solids are commensurate speci…
The magnetism of the polyoxometalate cluster {${\text{Mo}}_{75}{\text{V}}_{20}$}, containing a sawtooth ring of 10 corner-sharing triangles located on the equator of the barrel-shaped molecule, has remained debatable since it is masked by contributions from impurities as well as temperature-independent paramagnetism.…
A short review of the unique spectral properties of corroles—new members of porphines—is given. Main physical properties of corroles and their covalent dyads with fullerene are presented and discussed. A comparison of corroles properties with those of similar systems containing porphyrins is also given. Some advantage…
The 1D organic salt TTF[Ni(dmit)2]2 becomes superconductor with Tc=1.6 K under an applied hydrostatic pressure of 7 kbar. Structural determinations in this system lead us to suspect that superconductivity (SC) coexists with a charge density wave (CDW) instability at low pressure. In order to better understand how SC e…
Abstract Two different fibrous clays, halloysite nanotubes (HNTs) and organically modified attapulgite (OAT), were chosen to prepare poly( p ‐dioxanone) (PPDO)/clay nanocomposites by in‐situ polymerization. The influence of surface character and geometric structure of the clays on the properties of the nanocomposites…
Preparation of zein-methanesulfonic acid doped polyaniline (PANI) conductive blends using different approaches is described. Zein-PANI films from homogeneous solutions of the components in 1-methyl-2-pyrrolidinone were made by casting method. In another approach, in situ polymerisation of aniline in the presence of ze…
Natural frequencies of single-walled carbon nanotubes (SWCNTs) obtained using a model based on Eringen's nonlocal continuum mechanics and the Timoshenko beam theory are compared with those obtained by molecular dynamics simulations. The goal was to determine the values of the material constant, considered here as a no…
Quantum spin fluctuations are investigated for the distorted incommensurate spiral state of a geometrically frustrated triangular-lattice antiferromagnet. With increasing easy axis anisotropy, the average reduction of the spin amplitude by quantum fluctuations is suppressed but the spiral also becomes more distorted.…
Density functional theory (DFT) calculations and Kinetic Monte Carlo (KMC) simulations were employed to investigate the methanol synthesis reaction from CO{sub 2} hydrogenation (CO{sub 2} + 3H{sub 2} {yields} CH{sub 3}OH + H{sub 2}O) on metal-doped Cu(111) surfaces. Both the formate pathway and the reverse water-gas s…
Electron beam-induced carbonaceous deposition (EBICD) derived from residual hydrocarbons in the vacuum chamber has many fascinating properties. It is known to be chemically complex but robust, structurally amorphous, and electrically insulating. The present study is an attempt to gain more insight into its chemical an…
Abstract A new polymorph of D‐sorbitol (named as F form) was discovered in this paper. A reliable isolation method for this new polymorph was developed. Three other known polymorphs of D‐sorbitol were also prepared for comparative purpose. The new F form was analyzed and characterized by using PXRD, DSC, Raman and FTI…
Abstract In this article, rice husk flour filler/polypropylene (RH/PP) composites with different ratios of the filler were prepared without and with maleated PP, which was used as a compatibilizer. The RH filler in the RH/PP composites was treated with acid and alkali, and their mechanical properties were measured. Th…
The present work reports on the investigation of oxidation states, local symmetry, and optical properties of manganese and iron species in natural cordierite (Mg, Fe)2Al4Si5O18, by means of energy-dispersive X-ray fluorescence, electron paramagnetic resonance (EPR), photoluminescence (PL) and optical absorption techni…
Weak epitaxy growth (WEG) is an effective method in the preparation of high-mobility thin films of disk-like organic semiconductors. The growth behavior and quality of the epitaxial thin film are closely related to the inducing layers. Here, a series of fluorinated molecules, 5,5"-bis(3'-fluoro-biphenyl-4-yl)-2,2':5',…
In the present work the influence of a cross-section transition on freckle formation in the directionally solidified superalloy CMSX-4 was investigated. It was found that in stepwise expanding specimens the new freckle chains were not formed immediately at the bottom edge of the steps, but after an incubation height o…
Abstract New hybrid compounds have been synthesized by functionalization of cobalt and copper layered hydroxides by salen complexes. Two kinds of compounds have been obtained from [M(SalenSO 3 Na 2 )] (M = Cu 2+ , Ni 2+ , Co 2+ and Zn 2+ ) and the preintercalated copper and cobalt hydroxides Cu 2 (OH) 3 (DS) and Co 2…
Systematic directional solidification experiments were done with TRIS-NPG organic peritectic alloys to investigate peritectic solidification close to the limit of constitution undercooling. The experiments were carried out as in-situ observation in a horizontal micro Bridgman furnace. Under specific conditions isother…
This work evaluates a mixed columnar-equiaxed solidification model [Wu et al. 2010 Comp. Mater. Sci. 50 32] by comparison with the laboratory castings. In the numerical model nucleation of equiaxed crystals, tracking of the position of columnar primary dendrite tips, transition from non-dendritic to dendritic growth,…