Materials Literature
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Polydimethylsiloxane-based self-healing is achieved through the tin-catalyzed polycondensation of phase-separated droplets. The catalyst is released into the crack plane when microcapsules containing a tin compound are ruptured by the advancing crack (see figure). This system greatly extends the capability of self-hea…
▪ Abstract Metal-hydrogen (M-H) systems are interesting from both a theoretical and a practical point of view. M-H systems are utilized for energy-storage systems, in sensor applications, and in catalysis. These systems are often exploited as models for studying basic material properties, especially when the size of t…
▪ Abstract Nanostructured fibrous materials have been made more readily available in large part owing to recent advances in electrospinning and related technologies, including the use of electrostatic or gas-blowing forces as well as a combination of both forces. The nonwoven structure has unique features, including i…
By far the largest proportion of the Earth's biosphere is comprised of organisms that thrive in cold environments (psychrophiles). Their ability to proliferate in the cold is predicated on a capacity to synthesize cold-adapted enzymes. These enzymes have evolved a range of structural features that confer a high level…
Biogenic gold nanotriangles and spherical silver nanoparticles were synthesized by a simple procedure using Aloe vera leaf extract as the reducing agent. This procedure offers control over the size of the gold nanotriangle and thereby a handle to tune their optical properties, particularly the position of the longitud…
TTHA0727 is a conserved hypothetical protein from Thermus thermophilus HB8, with a molecular mass of 12.6 kDa. TTHA0727 belongs to the carboxymuconolactone decarboxylase (CMD) family (Pfam 02627). A sequence comparison with its homologs suggested that TTHA0727 is a distinct protein from alkylhydroperoxidase AhpD and g…
Recently, new ferroelectrets were developed from foams of polyethylene terephthalate and of cyclo-olefin polymers and copolymers. Here, we focus on ferroelectret films based on compounds of cyclo-olefin polymers. Suitable compounding and preparation led to cyclo-olefin polymer ferroelectrets which show an electromecha…
In our continued exploratory synthesis of compounds containing transition-metal oxide magnetic nanostructures, a new copper(II) phosphate phase, Cs2Cu3P4O14 (1), was isolated employing the mixed CsCl/2CsI molten flux. The X-ray single-crystal structural analysis shows that the Cs2Cu3P4O(14) phase crystallizes in a mon…
The nano-phase-separation in mixed polymer brushes consisting of polystyrene and poly(methyl methacrylate) (PS-PMMA) chains attached to a silicon surface is studied. The topographies of the mixed brushes are examined after they have been exposed to solvents which induce or erase nano-phase-separation. It is discussed…
X-ray absorption spectroscopy at the Cr K- and L(2,3)-edges was used to study the assembling process of a heterogeneous Cr-based single-site catalyst. The starting point was a Phillips-type system with monochromate species anchored on a silica surface, which was first reduced to a variety of different surface Cr(II) s…
A new, simple, versatile, and easily scaleable one-step preparation method – an impregnated carbon procedure (ICP) – is proposed to produce highly dispersed active phases on supports of tailored porosity (see scheme; AC: activated carbon). This one-step synthesis unites simplicity of preparation with outstanding prope…
Abstract Intrinsically conductive polymers (ICPs) and conductive composites offer many potential industrial applications due to their conductive properties, processability and mechanical properties. Much work has been carried out to develop the synthesis and formulation of various conductive polymers. Nevertheless, po…
The stochastic nature of percolation is shown as a possible issue for retention in PCM devices, due to the occurrence of unlikely crystallization events that early decrease the device resistance. Failure time dispersions at high temperatures are measured and analyzed through a crystallization Monte Carlo model. A phys…
In this work, we investigate the expected device performance and the scaling perspectives of carbon nanotube field effect transistors (CNT-FETs), with doped source and drain extensions, by means of a novel three-dimensional NEGF-based simulation tool capable of considering arbitrary gate geometry and device architectu…
The influences of charging parameters (such as charging voltage, charging time and charging temperature, etc.) on piezoelectricity and its thermal stability of cellular polypropylene film electrets were studied by means of contact charging, constant voltage corona charging methods and the thermal stimulated discharge…
We study the problem of nonlinear development of oscillatory convective instability in a two-dimensional mushy layer during solidification of a binary mixture. We adopt the near-eutectic limit, making the problem analytically tractable using standard perturbation techniques. We consider also a distinguished limit of l…
Controlling the spatial distribution of liquid droplets on surfaces via surface energy patterning can be used to deliver material to specified regions via selective liquid/solid wetting. Although studies of the equilibrium shape of liquid droplets on heterogeneous substrates exist, much less is known about the corresp…
Protein-mediated biomineral formation and polymorph selection in the mollusk shell involves the participation of a number of different proteins. One of these proteins, AP7, has been identified as a participant in nacre (aragonite) formation in the mollusk Haliotis rufescens. However, the role(s) of this protein in ara…
The drying process of crude cotton fabric is analyzed under two main aspects: analysis of moisture distribution inside the textile sheet, and analysis of certain operational convective drying process variables. Experimental apparatus consisted of a drying chamber in which samples of pure cotton textile were suspended…
Abstract Under‐stoichiometric thin silica layers SiO x with different stoichiometric degree 1 ≤ x ≤ 2, were prepared by thermal evaporation of silicon monoxide in vacuum and in ambient oxygen atmosphere of various pressure onto crystalline silicon substrates. The chemical composition has been determined by Fourier tra…