Materials Literature
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We report strong dielectric loss anomalies near 450 K in bismuth ferrite, together with anomalous magnon damping, and suggest that since this temperature is coincident with the mysterious ``Polomska transition'' [M. Polomska et al., Phys. Status Solidi A 23, 567 (1974)] at 458 \ifmmode\pm\else\textpm\fi{} 5 K, this ma…
Different chemically treated hemp fibre reinforced unsaturated polyester composites were investigated over a range of fibre content (0–60 wt%). Although Young’s modulus of all the short fibre reinforced unsaturated polyester composites was found to be higher than that of unreinforced unsaturated polyester; however, te…
An imaging torsional parallel-plate shear cell, producing a well-defined range of shear rates, was used to probe the dynamics of shear-induced structural transitions in complex fluids. The photonic properties of high molecular weight poly(styrene- b -isoprene) symmetric diblock copolymer solutions were exploited to vi…
Supramolecular complexes involving nanoscopic amphiphilic assemblies (AAs) and polyelectrolytes have been used to prepare a variety of materials, wherein the dynamic AAs retain the structural features, but the polyelectrolytes undergo conformational changes. Here we show that a charge bearing rigid conjugated polymer…
A new design paradigm for conformal, all-organic coatings that retain their flexibility and chemical functionality while displaying exceptional mechanical hardness and barrier properties is presented. Initiated chemical vapor deposition is used to synthesize a novel alternating copolymer thin film. Upon annealing, fil…
Helically folded molecular capsules based on oligoamide sequences of aromatic amino acids which are capable of binding tartaric acid in organic solvents with high affinity and diastereoselectivity have been synthesized, and their structures and binding properties investigated by (1)H NMR, X-ray crystallography, circul…
The increasing use of environmental transmission electron microscopy (ETEM) in materials science provides exciting new possibilities for investigating chemical reactions and understanding both the interaction of fast electrons with gas molecules and the effect of the presence of gas on high-resolution imaging. A gaseo…
Abstract A simple method for synthesis of novel organogels based on multiwalled carbon nanotubes (MWCNTs) is reported. Three classes of organogels were synthesized by crosslinking polymerization of dodecyl methacrylate with various weight percentages of 1,4‐butanediol dimethacrylate, vinyl‐group‐modified MWCNTs or pri…
The objective of the present investigation was to assess the potential of polysaccharide (mannose) conjugated engineered multiwalled carbon nanotubes (MWCNTs) bearing Amphotericin B (AmB) formulation for site-specific delivery to macrophages. The mannosylated carbon nanotubes (CNTs) were synthesized and AmB was effici…
Relaxen auf zweierlei Weisen: Ein Einzelmolekülmagnet mit einem defekten Co2Dy2-Dicuban als Kern zeigt langsame Relaxation der Magnetisierung bei einer Blocking-Temperatur von 22 K (bei 1500 Hz), die für einen 3d-4f-Einzelmolekülmagneten die höchste berichtete ist. Eine Analyse der Relaxation ergibt zwei Bereiche an B…
The seeding of gaseous impurities will be mandatory for ITER to protect the tungsten divertor from local heat loads. A promising candidate for radiative cooling seems to be nitrogen, but reactions with hydrogen may influence tokamak operation. In particular, the formation of ammonia can become a serious issue for gas…
Surface effects and interactions with capping ligands strongly influence the properties of semiconductor quantum dots (QDs), opening up possibilities for new technologies, e.g. molecule sensing, and limiting the efficiencies of other applications, e.g. based on QD luminescence. By computing and analyzing in detail the…
Ceramic coatings were prepared on ZK60 magnesium alloy in electrolyte with different concentration ratio of calcium and phosphorus (Ca/P) by micro-arc oxidation (MAO) technique at constant voltage. The microstructure, phase composition, elemental distribution, corrosion resistance, and adhesion of the coatings were in…
In this study the effect of different water conditions on the aggregation kinetics of nanosilver (nAg) is evaluated. The obtained results show that the aggregation rate of nAg increases with increasing electrolyte concentration. Divalent cation (Ca2+) can more effectively induce aggregation than monovalent cation (Na+…
This review considers the potential and challenges of using agro-based oil palm biomasses, including the trunk, frond, empty fruit bunch, and palm press fiber biocomposites, for furniture applications. Currently, design and quality rather than price are becoming the primary concern for consumers when buying new furnit…
Magnetic properties of magnetoelectric PbFe${}_{1/2}$Nb${}_{1/2}$O${}_{3}$ (PFN) have been studied with the help of M\"ossbauer spectroscopy. In contrast to the belief that Nb and Fe are randomly distributed in the lattice, we found that the Fe ions occupy two crystallographic positions, which differ by the quadrupole…
An efficient wet-chemical method based on soft interfacial self-assembly is developed for spontaneous, fast growth of large-area graphene nanofilms on various substrates. The graphene nanofilms produced show tunable optical properties and a highly reversible optoelectronic response. Complementary to chemical vapor dep…
We demonstrate that the internal magnetic states of a single nitrogen-vacancy defect, within a rotating diamond crystal, acquire geometric phases. The geometric phase shift is manifest as a relative phase between components of a superposition of magnetic substates. We demonstrate that under reasonable experimental con…
Bilayer hybrid composites fabricated by hand lay-up technique by impregnating oil palm empty fruit bunch and jute fibre mats with epoxy resin and cured at 100℃ for 1 h followed by post curing at 105℃. Bilayer hybrid composites were prepared by varying the relative weight fraction of the two fibres. The mechanical, mor…
In this work ZnO and Mn-doped ZnO nanocrystals were synthesized by one-step aqueous solution method. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray (EDX) analysis and photoluminescence (PL) spectroscopy have been used to characterize the samples in detail. The XRD studies revealed…