Materials Literature
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Paramagnetic colloidal particles that are optically trapped in a linear array can form a zigzag pattern when an external magnetic field induces repulsive interparticle interactions. When the traps are abruptly turned off, the particles form a nonequilibrium expanding pattern with a zigzag symmetry, even when the stren…
The key thin film thermoelectric characterization techniques are described. Because of the small dimensions, a careful examination of electrical and thermal paths in the device is necessary. We describe both in-plane and cross-plane measurement methodologies. Sample requirements for four-probe and van der Pauw methods…
Palladium-supported graphene oxide has been successfully applied as a catalyst precursor for the selective reduction of α,β-unsaturated carbonyl compounds. Pd nanoparticles were formed during the course of the reduction with only negligible leaching of the Pd species into the reaction mixture.
Al effects on strain aging and resistance against hydrogen embrittlement were examined in Fe–18Mn–0.6C-based twinning-induced plasticity steels deformed at different strain rates. These steels showed a hydrogen-induced fracture when they were pre-deformed at a strain rate of 1.7×10–6 s–1. This fracture was suppressed…
Ag/TiO2 and Ag/SiO2 composite spheres with core–shell structures were synthesized via an ion-exchange method. Thin layers of TiO2 or SiO2 are deposited onto CaMg(CO3)2 templates using tetrabutyl titanate or tetraethoxysilane, respectively, and the CaMg(CO3)2 cores are subsequently replaced by Ag2CO3 based on the solub…
Spider silk fibers are well known for their mechanical properties, and they are therefore in the focus of materials scientists. Additionally, silks display biocompatibility making them interesting materials for applications in medicine or cosmetics. Due to the low abundance of natural spider silk proteins because of t…
Abstract—A novel concentrator for static magnetic field enhancement is proposed and designed utilizing transformation optics. Compared with other devices for static magnetic field enhancement, our device has many good features: first, our concentrator can achieve a DC magnetic field enhancement in a relatively large f…
Carbon dioxide reforming of methane (methane dry reforming) over Ni–Ce0.8Zr0.2O2 catalysts prepared by a sol–gel auto-combustion method and a conventional co-precipitation method were comparatively studied. We show that sol–gel auto-combustion is very promising for preparing thermal stable homogeneous mixed metal oxid…
In this paper, various microstructures of yttrium and lanthanum tungstates were synthesized under hydrothermal conditions, at pH 5, in a ligand-free environment, and in the presence of a dioctyl sodium sulfosuccinate (DSS) surfactant. It was observed that the shape of the nanobuilding blocks, and therefore the archite…
Microgel multi-layer films assembled from anionic particles and linear polycation were prepared on elastomeric substrates and their self-healing properties studied. Dried films were imaged in situ during mechanical deformation and were determined to undergo plastic deformation in response to linear strain, leading to…
In the field of analytical chemistry, many scientific efforts have been devoted to develop experimental procedures for the characterization of organic substances present in heterogeneous artwork samples, due to their challenging identification. In particular, performances of immunochemical techniques have been recentl…
The goal of this proof-of-concept study was the fabrication of porous silk fibroin (SF) microspheres which could be used as cell culture carriers under very mild processing conditions. The SF solution was differentiated into droplets which were induced by a syringe needle in the high-voltage electrostatic field. They…
Colloidal crystals have gained increasing importance due to their fascinating ability to mold the flow of light and sound (heat). The characteristics of these ordered assemblies of particles are strongly determined by the respective building blocks, which require complete understanding of their physical properties. In…
The conversion of crumpled graphene materials to planar graphene sheets was performed through hydrogen gas treatment of graphene oxide at various temperatures. The resulting graphene materials were incorporated into supercapacitors and systematically examined. Up to 500 °C, a monotonically increasing relationship betw…
Biphenyl-3,4′-diol derived bent-core compounds with branched side chains have been synthesized and characterized to study the influence of terminal branched groups on mesophase properties and transition temperatures of bent-core mesogens. The liquid crystalline properties of the compounds were investigated by differen…
A series of new BODIPYs (4–9) with bulky meso-trimethylsilylphenyl substitution were synthesized. The effect of the substituent's position on the emission properties of the BODIPYs was investigated in detail both in solution and solid state. The new BODIPYs exhibit emission in single crystals and in thin films. The lo…
Silver nanoparticles (AgNPs) are one of the most effective disinfectants for eliminating pathogenic microbial contamination from water. The difficult separation of Ag-based disinfectants from water impedes their large-scale application. In this study, Ag-coated Fe3O4@SiO2 magnetic composite material (MCM-Ag) is prepar…
A series of carvone-derived statistical copolymers, CMXD (CM = carvomenthide; X = %D; D = dihydrocarvide), were prepared by ring-opening polymerization. The olefinic side chains were subsequently modified by the thiol–ene reaction using mercaptoethanol to provide CMXD′ (D′ = hydroxy-functionalized dihydrocarvide unit)…
The aggregation of amyloid peptides into ordered fibrils is closely associated with many neurodegenerative diseases. The surfaces of cell membranes and biomolecules are believed to play important roles in modulation of peptide aggregation under physiological conditions. Experimental studies of fibrillogenesis at the m…
Two novel cross-conjugated isomers based on 4,8-dithienylbenzo[1,2-b:4,5-b']dithiophene have been designed and successfully synthesized. It was found that the charge transfer interaction was much stronger in the benzodithiophene direction as compared with the other perpendicular direction.