Materials Literature
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In this study, we focus on the room-temperature mechanical properties of LAST (Pb–Sb–Ag–Te) materials fabricated using casting with slow-cool temperature profiles (cooling rate <5°C h−1) including biaxial flexural strength, indentation hardness, Young's modulus, and dynamic elastic moduli. The slow-cooled specimens ex…
In many fields of industry, erosion is the dominant wear mechanism that reduces the lifetime of costly machine parts such as crushers, hammer bars, or cutting edges. Particles of specific mechanical and geometrical properties hit the surface with a certain energy and, under different angles of impact, cause abrasion a…
Two homologous series of liquid crystalline azoesters consisting of a lateral hydroxyl substituent on the central benzene ring at 2′ positions have been synthesized and thermally characterized. All the 24 members, of both series, exhibit high temperature nematic phases. All the compounds of both series are thermally s…
In this paper we report on a synthesis and basic characterisation (polarising optical microscopy, differential scanning calorimetry, thermo-optical analysis) of four new liquid-crystalline compounds. These are 4''-heptylphenyl 4-[(4'-nonyloxyphenyl)diazenyl]benzoate and its three derivatives differentiating from the p…
The influence of ethylenediaminetetra-acetic acid (EDTA) on the corrosion of mild steel in 1.0 M hydrochloric acid solution was investigated by means of potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The efficiency of EDTA was compared with thiourea. Primary results obtained revealed th…
Organic nanocrystals have been extensively studied in recent years for their unique optoelectronic properties and for applications in medicine. We report the first synthesis of nanocrystals from the dye compound indigo by reprecipitation. Scanning electron microscopy and dynamic light scattering reveal the particles t…
The spin-Hamiltonian (SH) parameters (g factors g //, g ⊥ and hyperfine structure constants 63 A //, 63 A ⊥, 65 A //, 65 A ⊥) for Cu2+ ions in the trigonally-distorted tetrahedral sites of ZnO and GaN crystals are calculated from a complete diagonalization (of energy matrix) method (CDM) based on a two spin-orbit para…
Abstract Graft copolymer of natural rubber and poly(dimethyl(methacryloyloxymethyl)phosphonate) (NR‐ g ‐PDMMMP) was prepared in latex medium via photopolymerization. It was then used to promote the blend compatibility of dynamically cured 40/60 natural rubber (NR)/ethylene vinylacetate copolymer (EVA) blends using var…
Recent progress in nanoscale materials science has pushed the basic research on physical effects while going to such length scales. Particularly, the study of size effects on heat conductivity has attracted much theoretical and experimental interest. In this work we explore the possibilities to study such kinds of phe…
Radiation-induced creep and swelling is formulated in terms of the segregation of vacancies and interstitials to the microstructural sinks, such as voids, dislocations, and dislocation loops, in order to provide the physical basis for the effect of stress on swelling, radiation-induced creep, and the interrelationship…
New classes of amphiphilic polyesters were prepared from metallated (Si, Ge) fatty methyl ester (FAME) precursors and poly(tetramethylene oxide) glycol. Hydrosilylation of 10-undecenoic methyl ester by tetramethyldisiloxane occurred at 80 degrees C in the presence of Karstedt's catalyst, and hydrogermylation of the sa…
The Protein Data Bank file format is the format most widely used by protein crystallographers and biologists to disseminate and manipulate protein structures. Despite this, there are few user-friendly software packages available to efficiently edit and extract raw information from PDB files. This limitation often lead…
A series of 2-(4-alkoxyphenyl)-5-p-tolyl-1,3,4-thiadiazole derivatives 2a–2h were synthesised efficiently under microwave irradiation and solvent-free conditions. The thermal properties were determined using polarised optical microscopy (POM), differential scanning calorimetry (DSC), and thermogravimetric analysis (TG…
Engineered fabric manufacturing needs a thorough understanding of the functional properties and their key control construction parameters. When the relationship between a set of interrelated properties goes out of the complete comprehension of human brain, neural networks could be used to find the unknown function. Th…
We develop a theory of microphase separation in a melt of flexible AB block copolymers with liquid crystalline side groups (C) attached to the B block using the strong segregation approximation. Within this theory, we analyze a case when all components of the system are strongly incompatible with each other. We predic…
Thin hollow platinum tubes are nanostructures with interesting properties for applications in the fields of catalysis, electrochemistry, biosensors, and fuel cells. In this paper, we describe a facile and fast nanofabrication method to directly prepare hollow platinum nanoshell tube arrays on a wafer through a galvani…
The interior of 237 nm spherical vinylsilsesquioxane nanoparticles has been covalently modified and their surface functionalized under mild conditions to yield a novel type of hybrid silsesquioxane nanoparticles. Data obtained from thermogravimetric and elemental analysis show that the vinyl groups inside the nanopart…
The effects of friction on tribo-magnetization mechanisms for self-mated iron pairs under dry friction were experimentally investigated in this study. By comparing the effects of sliding speeds and normal loads on surface magnetization, the physical contradiction in frictional magnetization can therefore be classified…
The reaction behavior of the chemical modification of boron nitride nanotubes (BNNTs) with ammonia plasmas has been investigated by density functional theory (DFT) calculations. Unlike previously studied functionalization with NH(3) and amino functional groups, we found that NH(2)(*) radicals involved in the ammonia p…
We have used molecular dynamics simulations to study the structures of a range of heterogeneously functionalized (“variegated”) dendrimers and the distributions in space of their caps. By a virtual capping approach, we compare an asymmetric dendrimer (dendritic poly( l -lysine), PLL) and a symmetric polyamide (SPAM) d…