Materials Literature
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Understanding the microscopic mechanism of the fast dynamics (gigahertz-terahertz frequency range) in amorphous materials remains a challenge. Disordered systems usually exhibit two additional contributions in this frequency range in comparison to their crystalline counterparts: a low-frequency excess vibrations, the…
The success of tissue-engineered cartilage constructs (TECCs) as treatment options for healing cartilage defects can only be achieved if suitable preservation methods are found that can maintain their viability and function. Simply lowering the temperature of cells and tissues to below their freezing point invariably…
The electrical conductivities and oxygen permeation properties of Pr 2 Ni 0.75 Cu 0.25 Ga 0.05 O 4+δ were measured by conventional DC four‐probe method with Pt electrode and gas chromatography. The total conductivities increased with an apparent slope of 1/6, satisfied by the charge neutrality condition at the p ‐type…
Abstract Rheological, thermal, and mechanical properties of polymer particle/LLDPE blends were studied in this paper. The blends were prepared individually by incorporating nanoparticles of polystyrene (nPS) of ∼60 nm and polymethyl methacrylate (nPMMA) of ∼50 nm with different wt% loading (i.e., 0.10–0.5%). It was sh…
A first-principles-derived scheme is developed and used to investigate the diffuse character of the paraelectric-to-ferroelectric transition in ultrathin films made of ${\text{BaTiO}}_{3}$, and to reveal its dependency on mechanical and electrical boundary conditions, as well as on thickness. It is found that such dif…
Sacoglottis gabonensis est une plante médicinale qui est utilisée dans le traitement traditionnel de l’ulcère de Buruli en Côte d’Ivoire. En vue d’établir l’innocuité de ce traitement, des tests de toxicité aiguë et subaiguë ont été réalisés. A cet effet, la DL50 a été déterminée chez la souris, ainsi que les paramètr…
Radical-substituted radical cation salts are exotic species that are potentially applicable as spin building blocks for molecular magnets. We recently found that these species, which are derived from a diphenyldihydrophenazine ( DPP ) framework, are stable under aerated conditions at room temperature. Of these species…
An electric field tunable magnetic hysteresis loop was studied in a multiferroic heterostructure consisting of a 25 µm thick Metglas® ribbon affixed to a lead magnesium niobate–lead titanate (PMN–PT) crystal. This multiferroic heterostructure exhibits a considerably strong converse magnetoelectric effect, CME = −80%,…
Atomic-scale instabilities, in which atomic bonds are broken and reform as the body shifts into a lower-energy configuration, are responsible for a wide range of material behaviours of interest. Building upon previous work, we outline here the construction of a criterion for the prediction of such instabilities. The c…
Photoinduced surface relief grating (SRG) formation for a single crystal of 4-aminoazobenzene was investigated. It was found that SRG could be inscribed on the (001) surface of the crystal, which might suggest that the photoinduced SRG formation is a general phenomenon observed for single crystals of azobenzene-based…
Abstract Relations between beads formation and jet profiles, and beads formation and electric discharge during electrospinning were investigated by changing sample parameters and spinning conditions. The jet profiles were obtained as a function of the position along the spinning line by using photographs. As the molec…
Porous metal (Pd and Co) and semiconductor (ZnO) nanowires, porous metal (Pt and Ni) nanotubes, and unique multiple Pt nanowires are prepared from a novel nanoconfined surfactant templated electrodeposition approach. More specifically, the overall diameter of nanowires or nanotubes is defined by the pore channels of m…
Wireless and/or sensorless components offer a great potential for friendly integration in mechatronic systems. This paper presents a wireless technique to actuate a bistable curved beam using wavelength-selective shape-memory-alloy (SMA) thin foils. The SMA thin foil is irradiated remotely by continuous-mode laser dio…
The activity of zinc (Zn) ions in the soil solution bathing plant roots is controlled by the simultaneous equilibrium of several competing reactions, such as surface exchange, specific bonding, lattice penetration, precipitation reactions, and the processes leading to the desorption of surface and lattice-bound ions.…
Abstract During the rotation extrusion of polyethylene (PE) pipes, with the rotating mandrel, compressed air as a cooling medium was introduced through their interior to achieve the quick cooling of the inner wall. The experimental results showed that the hoop stress exerted by mandrel rotation could promote the molec…
The reciprocating sliding friction and wear properties of two novel materials of Zr 2 [Al(Si)] 4 C 5 ceramic and Zr 2 [Al(Si)] 4 C 5 –30 vol% SiC composite against Si 3 N 4 ball were investigated. The sliding friction process of Zr 2 [Al(Si)] 4 C 5 against Si 3 N 4 experiences two different stages under constant norma…
Abstract We report the chemical modification of polyethylenimine (PEI) by functionalization with dopamine (Do) using glutaraldehyde (Glu) as a linker (PEI‐Glu‐Do). The new polymer was characterized by FT‐IR spectroscopy, by derivative UV‐vis spectroscopy, and Cyclic Voltammetry. The PEI‐Glu‐Do demonstrated to have an…
The structural and electronic properties of the bare Au 55 cluster, and of the model thiol passivated Au 55 (SCH 3 ) 42, the redox active ligated Au 55 S(CH 2 ) 2 CO 2 (CH 2 ) 10 bpy·2Cl and Au 55 (SCH 3 ) 41 (S(CH 2 ) 2 CO 2 (CH 2 ) 10 bpy)·2Cl (bpy = N -methyl-4,4′-bipyridinium) complexes are studied at the DFT leve…
The effect of Cu content on the corrosion resistance of Zr-1%Nb-xCu(x=0.05%- 0.5%,mass fraction) was investigated in superheated steam at 500℃and 10.3 MPa by autoclave tests.The microstructures of the alloys and oxide films on the corroded specimens were observed by TEM and SEM,respectively.The results showed that whe…
A new polymeric ligand was synthesized by the reaction of bisphenol-A and formaldehyde in the basic medium, followed by condensation polymerization with barbituric acid in the acidic medium. Polymer metal complexes were prepared by reaction of this resin with Mn(II), Co(II), Ni(II), Cu(II), and Zn(II). The polymeric r…