Materials Literature
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The condition for the rearrangement of martensite variant (RMV) by magnetic field has been studied quantitatively in a wide temperature range for two types of alloys: a Ni 2 MnGa with 10M martensite and a Ni 2.02 Mn 1.09 Ga 0.89 with 14M martensite. The RMV by magnetic field occurs at any temperature for the 10M marte…
Characterization of materials is crucial for the quantification and prediction of their physical, chemical, and mechanical properties. However, as the complexity of a system increases, so do the challenges involved in elucidating its structure. While molecular simulation and modeling have proved invaluable as compleme…
An achiral nonlinear optical chromophore with a "remote functionality" that can act as a ligand is developed on the basis of 4-nitroaniline derivatized with pyridine. The molecules are assembled through complexation with simple achiral zinc(II) salts and the H-bond network mediated by the counterions, to generate nonc…
The prototypical tryptophan synthase is a stable heterotetrameric alpha-betabeta-alpha complex. The constituting TrpA and TrpB1 subunits, which are encoded by neighboring genes in the trp operon, activate each other in a bi-directional manner. Recently, a novel class of TrpB2 proteins has been identified, whose member…
Sapphyrins are pentapyrrolic metal-free expanded porphyrins with potential medical use as anticancer agents. The novel sapphyrin derivative, PCI-2050, functionalized with 2-[2-(2-methoxyethoxy)ethoxy]ethoxy groups to enhance solubility and a modified bipyrrole moiety was found to be more potent in inducing apoptosis t…
Forty-one different polymer samples, collectively called the Polymer Erosion and Contamination Experiment (PEACE) Polymers, have been exposed to the low Earth orbit (LEO) environment on the exterior of the International Space Station (ISS) for nearly 4 years as part of Materials International Space Station Experiment…
The use of date palm mesh fibres (DPMF) as reinforcements for polymeric matrices is the aim of this work. A first step towards fibre preparation and cleaning for further treatment is described. DPMF were chemically cleaned using sodium hydroxide, carbon tetrachloride, a detergent and an alcoholic mixture of toluene/me…
Compounds of ground tyre rubber (GTR) and polypropylene (PP) were prepared in an internal mixer and characterised by means of mechanical, thermal and morphological testing. Only physical melt mixing could not provide a suitable interface compatibilisation and leads to compounds with poor mechanical properties. However…
To achieve micro‐machined piezoelectric film devices, crack‐free and dense 10‐μm‐thick lead zirconate titanate (PZT) films were successfully deposited onto 2‐in. Pt/Ti/SiO 2 /Si substrates using an automatic coating system, and disk‐shaped structures with a diameter from 20 to 100 μm were fabricated by an RIE process.…
A new diffractometer system was designed and built for the G2 experimental station at the Cornell High Energy Synchrotron Source (CHESS). A six-circle κ goniometer, which provides better access to reciprocal space compared to Eulerian cradles, was chosen primarily to perform large angle Bragg diffraction on samples wi…
Single-walled carbon nanotubes (SWCNTs)were grown on Si∕SiO2 substrates by catalytic chemical vapor deposition using ethanol as a carbon source. We found that a bimetallic catalyst, Fe–Co, worked efficiently in growing SWCNTs in contrast to Fe or Co catalyst only. The underlying mechanism was carefully studied by obse…
Using silica colloids as nanospacers and ultraflat highly conductive silicon wafers as electrodes, a novel experimental approach is demonstrated, which, in combination with broadband dielectric spectroscopy, enables one to investigate the molecular dynamics in ultrathin organic layers having one free interface. This o…
After surface modification of γ-Al2O3 nanoparticles with a silane coupling agent, styrene was graftcopolymerized onto γ-Al2O3 nanoparticles using a simultaneous γ-ray irradiation technique. The influence of the irradiation dose and the grafting kinetics were investigated in detail. Polypropylene nanocomposites were fa…
Controlling the appearance of crystal polymorphs of pharmaceuticals is essential in developing robust large-scale crystallization processes in the pharmaceutical industry. This review describes many of the thermodynamic and kinetic factors that are important for controlling crystal polymorphism and discusses recent ad…
This paper is concerned specifically with the growth and development of pitting on mild steel surfaces under anaerobic conditions, that is, when sufficient corrosion product has built-up under marine immersion conditions for the corrosion environment at the rust-metal interface to have become anaerobic. Recent detaile…
Electronic structures of LaNi5-xCox (x = 0, 0.5, 1) hydrogen-storage alloy were studied theoretically using the method of total energy based on the density functional theory (DFT). The plane wave function was selected as the basis set in combination with the ultrasoft pseudopotential technology. Crystal structure, ene…
A novel approach for preparing hierarchical porous nickel structures has been developed. It is an aqueous processing of the template, macroporous silicon, which was etched in HF solution to have straight channels. By immersion in a prepared nickel solution, the silicon sidewalls were replaced by nickel deposits to for…
A Commentary on the paper ”Response times and voltages for PDLC shutters„, by Bao‐Gang Wu, John H. Erdman and J. William Doane. First published in Liquid Crystals, 5, 1453‐1465 (1989).
Abstract Activated carbon particles were obtained by a solvatation method and added as fillers in cellulose triacetate as polymeric matrix. Various composite films were prepared by solvent casting at different controlled temperature and relative humidity (35–55° C, 10–70% RH) conditions, for three different filler loa…
Purpose To develop new eco‐environmentally friendly surface treatments based on cerate compounds as alternatives to the process involving toxic chromates for the corrosion protection of magnesium alloys. Design/methodology/approach A treatment process in which a surface was alkaline‐etched prior to ceria treatment is…