Materials Literature
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Increasing the citrate concentration during the seeded growth synthesis of gold nanoparticles yields materials with decreased aspect ratios and increased defect densities. The stability of these nanoparticles is attributed to variations in their overall Gibb's free energy.
Electrical transport of a highly doped disordered conducting polymer, viz. poly-3,4-ethylenedioxythiophene stabilized with poly-4-styrenesulphonic acid, is investigated as a function of bias and temperature. The transport shows universal power-law scaling with both bias and temperature. All measurements constitute a s…
The deposition of Ge 25 Sb 10 S 65 and Ge 25 Sb 10 Se 65 amorphous chalcogenide thin films was performed by radio‐frequency magnetron sputtering and pulsed laser deposition technique. The deposited layers were characterized by studying their morphology, topography, chemical composition, structure, and optical function…
This paper investigated wicking properties of cotton-acrylic rotor yarns and knitted fabrics. The effect of yarn wicking on wicking of fabric in both wale and course directions was also discussed. One way ANOVA results of the experimental study suggested that wicking abilities of yarns and fabrics increased with the i…
Triangular cationic belts [Au3{PPh2(C6H4)nPPh2}3]3+ enclose bimetallic clusters [AuwAgx(C2Ph)yXz] in molecular aggregates obtained by halide (X)-directed assembly of multicomponent systems. The largest aggregate consists of a central metal alkynyl halide cluster [Au18Ag30(C2Ph)36Cl9]3+ inside a [Au3{PPh2(C6H4)5PPh2}3]…
Abstract Expandable graphite oxide (EGO) was functionalized with different amine groups after sequential steps as thermal expansion, oxidation, acylation, and amidation. Three types of amino‐functionalized graphenes (a‐Gphs) were prepared by exfoliating amino functionalized EGOs(a‐EGO) through controlled ultrasonicati…
Colloidal microcapsules (MCs) are highly modular, inherently multiscale constructs of capsules stabilized by nano-/microparticle shells, with applications in many areas of materials and biological sciences, such as drug delivery, encapsulation, and microreactors. Until recently, fabrication of colloidal MCs focused on…
We investigate the relative energetic stability and the magnetic properties of MnO in the rocksalt $(rs)$, wurtzite $(wz)$, and zinc-blende $(zb)$ structures using density-functional theory with different approaches to exchange and correlation: the semilocal generalized-gradient approximation (GGA), the $\text{GGA}+U$…
In this study, organocatalytic systems containing both basic and acidic sites, which can activate simultaneously the chain end and the monomer, were investigated in the ring-opening polymerization of l -lactide. To this end, equivalent amounts of ( N, N -dimethylamino)pyridine (DMAP) and of its protonated form (DMAP·H…
In films, mats, buckypaper, and other materials composed of carbon nanotubes (CNTs), individual CNTs are bound together by van der Waals forces and form entangled networks of bundles. Mesoscopic dynamic simulations reproduce the spontaneous self-assembly of CNTs into continuous networks of bundles and reveal that the…
Superparamagnetic iron oxide nanoparticles are widely used as nanoprobes for magnetic resonance imaging (MRI). Water-soluble iron oxide nanoparticles were synthesized by coating iron oxide nanoparticles with a hydrophilic, biocompatible, biodegradable poly(amino acid) derivative, poly(2-hydroxyethyl aspartamide) graft…
Hydrogels derived from self-assembled Fmoc-F(5)-Phe fibrils are stabilized with respect to shear-response by co-assembly with C-terminal PEG-functionalized Fmoc-F(5)-Phe.
A generalized silica coating scheme is used to functionalize and protect sub-micron and micron size dicyclopentadiene monomer-filled capsules and polymer-protected Grubbs' catalyst particles. These capsules and particles are used for self-healing of microscale damage in an epoxy-based polymer. The silica layer both pr…
Lignocellulosic natural fibers are promising materials for use as reinforcement in composites for a wide variety of polymers. Silane treatment through aminopropyl triethoxy silane as a simple and convenient method for surface modification of Saccaharum cilliare fibers is introduced in this article. The surfaces of lig…
A monatomic layer of graphite (MG or graphene) adsorbed on the (111) faces of transition metals Pt, Ir, and Ni, has been employed for controlling the atomic hydrogen adsorption site selectivity and the amount of hydrogen adsorbed upon saturation. The variations in the graphene-metal chemical bonding caused by hydrogen…
Within a two-dimensional Landau–de Gennes tensorial formalism we study the equilibrium configurations of nematic shells, thin films of nematic liquid crystal deposited on the boundary of colloidal particles of arbitrary shape enforcing a degenerate tangential anchoring on the nematic molecules. In this formalism, defe…
A method has been developed to create vertically aligned carbon nanotube (VACNT) thermal interface materials that can be attached to a variety of metallized surfaces. VACNT films were grown on Si substrates using standard CVD processing followed by metallization using Ti/Au. The coated CNTs were then bonded to metalli…
Over the last decade {\it ab initio} modeling of material properties has become widespread in diverse fields of research. It has proved to be a powerful tool for predicting various properties of matter under extreme conditions. We apply modern computational chemistry and materials science methods, including density fu…
Reliable modeling of the atmospheres of cool white dwarfs is crucial for understanding the atmospheric evolution of these stars and for accurate white dwarfs cosmochronology. Over the last decade {\it ab initio} modeling entered many research fields and has been successful in predicting properties of various materials…
Structural transitions are invariably affected by lattice distortions. If the body is to remain crack free, the strain field cannot be arbitrary but has to satisfy the Saint-Venant compatibility constraint. Equivalently, an incompatibility constraint consistent with the actual dislocation network has to be satisfied i…