Materials Literature
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Piezoelectric actuators convert electrical into mechanical energy and are implemented for many large-scale applications such as piezoinjectors and ink jet printers. The performance of these devices is governed by the electric-field-induced strain. Here, the authors describe the development of a class of lead-free (0.9…
We present a new class of boron sheets, composed of triangular and hexagonal motifs, that are more stable than structures considered to date and thus are likely to be the precursors of boron nanotubes. We describe a simple and clear picture of electronic bonding in boron sheets and highlight the importance of three-ce…
Formation of inclusion bodies is an important obstacle to the production of active recombinant protein in Escherichia coli. Thus, soluble expression of penicillin G acylase from Kluyvera citrophila was investigated in BL21(DE3). In this study, the yield of active enzyme was significantly enhanced by the composition of…
The known corrosion protection principles of intrinsically conducting polymer (ICP) coatings involve complex interactions with the metallic surface. A set of electrochemical substrate pretreatments were developed in a previous work to modify the properties of the metal/ICP interface in a controlled way, leaving the IC…
Lipoprotein e (P4) from Haemophilus influenzae belongs to the "DDDD" superfamily of phosphohydrolases and is the prototype of class C nonspecific acid phosphatases. P4 is also a component of a H. influenzae vaccine. We report the crystal structures of recombinant P4 in the ligand-free and tungstate-inhibited forms, wh…
A new molecular tecton with a flexible conformation, 1-methyl-ethyldeneaminopyridinium, was synthesized, and its corresponding compound with [Ni(mnt)(2)](-) exhibits novel CN...pi interactions and spin transition.
Surface graft polymerization of 1-vinyl-2-pyrrolidone onto a silicon surface was accomplished by atmospheric pressure (AP) hydrogen plasma surface activation followed by graft polymerization in both N-methyl-2-pyrrolidone (NMP) and in an NMP/water solvent mixture. The formation of initiation sites was controlled by th…
Au° atoms in hydrophobized gold nanoparticles were oxidized to Au 3+ ions, nearly quantitatively, simply by treatment with N- bromosuccinimide and sonication. 1 H NMR results indicate that the octadecylamine molecules are detached from the Au° surface by NBS. The bromine molecules released by NBS are suggested to be t…
Neutral layers of the bimetallic oxalate complex {[Co(H2O)2]3[Cr(ox)3]2}infinity are formed in the presence of a crown ether and stabilized by hydrogen bonding. The resulting soluble ferromagnet orders at Tc = 7.4 K.
To gain insight into the degree by which sulfur-based contaminants poison the solid oxide fuel cell (SOFC) anode, we examine adsorption and dissociation of consecutive molecules of hydrogen sulfide on a nickel (111) surface. Preferred adsorption sites, energies, transition states, and kinetic barriers are calculated f…
We have synthesized crystalline Fe-doped trititanate nanotubes via a wet-chemistry method. The products were characterized by high-resolution transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDS), in-situ X-ray diffraction (XRD), ultraviolet−visible spectrophotometry (UV−vis), synchrotron…
Lattice Monte Carlo simulations are used to study the stabilization of different ordered bicontinuous phases in A−B diblock copolymer systems. The stabilization approach involves attempting to reduce the packing frustration inside the nodes of the bicontinuous phases by the addition of an A-component “additive”. Two d…
Ferroelectric low-tolerance-factor perovskites are gathering a lot of attention in the search for novel perovskite solid solutions with a morphotropic phase boundary, which present the highest piezoelectric coefficients known. However, thermodynamic stability is an issue, and powders and ceramics of a number of compos…
The mechanism for methanol oxidation on both TiO 2 and V/TiO 2 was investigated using temperature-programmed experiments with in-situ infrared spectroscopy. Infrared and Raman spectroscopy, along with XANES, show that the V/TiO 2 sample consists predominantly of isolated VO 4 units after calcination. Methanol was foun…
Abstract Purpose – This paper seeks to evaluate the effect of natural menthols and their synthesised epoxy‐allylmenthols as a non‐toxic inhibitor on the corrosion of steel in HCl media at various temperatures. Design/methodology/approach – Epoxy‐allylmenthols were synthesised and characterised. Gravimetric technique w…
Purpose In this paper, the main aim is to study the influence of some nitrogen heterocyclic compounds, namely 2‐mercaptobenzimidazole (2‐MBI), 2‐mercaptobenzoxazole (2‐MBO) and 2‐mercaptobenzothiazole (2‐MBT) on the corrosion inhibition of copper in 0.5 M sulphuric acid. Design/methodology/approach Measurements were c…
The relationship between the structure and composition with the magnetic properties of near stoichiometric cobalt ferrite nanoparticles Co x Fe 3 - x O 4+ δ (0.85 < x < 1.1) prepared in large batches with average sizes in the range 60−210 nm has been investigated. Chemical analysis and Rietveld refinement of the X-ray…
Abstract Novel amphiphilic block polymers composed of poly(l-lactic acid) (PLLA) and poly(sarcosine) (PS) were synthesized by successive polymerizations of lactide and sarcosine N-carboxy anhydride (NCA). The degree of polymerization of each block was controlled by the monomer/initiator ratio in feed. The block polyme…
Polymer-stabilized gold nanoparticles (AuNPs) were prepared and encoded with a range of surface-enhanced Raman reporter molecules. A range of as-synthesized polymers produced by reversible addition fragmentation chain transfer (RAFT) polymerization were demonstrated to self-assemble at the surface of AuNPs dispersed i…
Novel oligomeric alkoxysilanes consisting of double-four-ring (D4R) units functionalized with mono-, di-, and trialkoxysilyl groups (designated as 1, 2, and 3, respectively) were designed as nanobuilding blocks for synthesizing silica-based nanomaterials. Hydrolysis and polycondensation of these oligomers were perform…