Materials Literature
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Crowding effects relevant to the phase stability of binary mixtures of rod-like and spherical particles are investigated by means of Monte Carlo simulations in the isobaric NPT ensemble. The two types of particles are represented, respectively, by freely rotating hard spherocylinders of a moderate aspect ratio (L/sigm…
Under sufficiently crowded conditions, elongated particles spontaneously align along a common axis and separate from particles with dissimilar packing parameters. Clarifying the relevance of these entropy-driven phenomena to intact cells has required the development of theoretical approaches that tractably take into a…
Zn(II) binding by the dipyridine-containing macrocycles L1-L3 has been analyzed by means of potentiometric measurements in aqueous solutions. These ligands contain one (L1, L2) or two (L3) 2,2'-dipyridine units as an integral part of a polyamine macrocyclic framework having different dimensions and numbers of nitrogen…
This paper describes an approach to adhere retinal cells on micropatterned polyelectrolyte multilayer (PEM) lines adsorbed on poly(dimethylsiloxane) (PDMS) surfaces using microfluidic networks. PEMs were patterned on flat, oxidized PDMS surfaces by sequentially flowing polyions through a microchannel network that was…
Abstract The supermolecular structures and structural relaxation of the waste rubber–urethane composites are discussed on the basis of results of calorimetric measurements and mechanical spectroscopy. The results give a broader understanding of the relationship between processing history and morphology in the resultan…
Abstract Three epoxy compositions have been developed by using polyether amine hardeners having varying chain lengths of polyethers. Unlike normal epoxies, the compositions show low glass transition temperatures (0–45°C). Dynamic mechanical analysis and time–temperature superposition of the isotherms indicate that the…
We have measured the adiabatic second order elastic constants of two $\mathrm{Ni}\text{\ensuremath{-}}\mathrm{Mn}\text{\ensuremath{-}}\mathrm{Ga}$ magnetic shape memory crystals with different martensitic transition temperatures, using ultrasonic methods. The temperature dependence of the elastic constants has been fo…
The glide of an edge dislocation, in a random solid solution, $\mathrm{Ni}$ (1 to 8 at % $\mathrm{Al}$), is simulated by molecular dynamics (MD). An embedded atom method potential has been optimized to reproduce the relevant properties of the face centered cubic solid solution and of the $\mathrm{L}{1}_{2}$ ${\mathrm{…
Functionalization of carbon nanotubes (CNTs) is important to increase their solubility and reactivity. This paper investigates possible ways of functionalizing CNTs using the methoxy radical and the secondary butyl anion as initiators and their reactions with ethylene and epoxide, leading to polyethylene- and polyepox…
The correlation between chirality of the B2 and B4 phases was examined by measuring the circular dichroism (CD) in the classic bent-core molecule, P-12-O-PIMB, which shows a direct B2 to B4 phase transition on cooling. Among the various structures formed in the tilted B2 phase, the homochiral SmC S P F and SmC A P A l…
Abstract A novel composite was prepared by ball‐milling crystalline cellulose and maleic anhydride (MA) grafted polypropylene (MAPP) and its characteristics compared with a corresponding composite prepared by a conventional melt‐mixing method. The ball‐milling induces the formation of more ester bonds between cellulos…
Abstract A series of multifunctional cycloaliphatic glycidyl ester and ether epoxy resins were synthesized by reaction of condensed rosin acid‐formaldehyde resins with epichlorohydrin. The chemical structure of the produced resins was determined by IR and 1 H‐NMR analysis. The molecular weight of the produced resins w…
The current status of research on boron-carbon-nitrogen (B-C-N) and boron nitride (BN) nanotubes is presented. The latest achievements in syntheses, analyses and property measurements of these nanoscale tubular architectures are reviewed. The characteristic features of B-C-N and BN nanotubes, compared with conventiona…
Using first principles calculations based on the density functional theory and generalized gradient approximation we show that the ground state of Mn doped ZnO $(10\overline{1}0)$ thin film changes from antiferromagnetic to ferromagnetic when codoped with N. The ferromagnetic coupling between Mn spins arises due to th…
Abstract This article concerns the effectiveness of MAPP as a coupling agent in sisal–polypropylene composites. The fiber loading, MAPP concentration, and fiber treatment time influenced the mechanical properties of the composites. It was observed that the composites prepared at 21 volume percent of fibers with 1% MAP…
Brillouin light scattering experiments from transverse acoustic (TA) and longitudinal acoustic (LA) waves in glycerol have been performed in the temperature range between 170 and $229\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, including both the supercooled and the glassy state of the system. The intensity of light scatte…
By lithographically fabricating an optimised Wheatstone bridge geometry, we have been able to make accurate measurements of the resistance of grain boundaries in Y1-xCaxBa2Cu3O7-d between the superconducting transition temperature, Tc, and room temperature. Below Tc the normal state properties were assessed by applyin…
Extended X-ray Absorption Fine Structure (EXAFS) experiments have been carried out on PrRu$_4$P$_{12}$ and PrOs$_4$P$_{12}$ to study the metal-to-insulator (MI) phase transition in PrRu$_4$P$_{12}$. No Pr displacement was observed across the MI transition temperature from the EXAFS data. Instead, our EXAFS data clearl…
Since the concept of a surface collective excitation was first introduced by Ritchie, surface plasmons have played a significant role in a variety of areas of fundamental and applied research, from surface dynamics to surface-plasmon microscopy, surface-plasmon resonance technology, and a wide range of photonic applic…
Many properties of disordered materials can be understood by looking at idealized structural models, in which the strain is as small as is possible in the absence of long-range order. For covalent amorphous semiconductors and glasses, such an idealized structural model, the continuous-random network, was introduced 70…