Materials Literature
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The magnetization dynamics of a wound [DyFe(2)(20 Å)/YFe(2)(80 Å)](×40) exchange spring multilayer have been explored in optical pump probe experiments. Ultrafast optical heating was used to modify the magnetic parameters of the multilayer, while the time resolved magneto-optical Kerr effect was used to probe its resp…
We have investigated the diffusion dynamics of protons in hydrated 4.2% Ca-doped LaPO 4, a candidate electrolyte for proton-conducting intermediate temperature fuel cells. The macroscopic and microscopic dynamics have been studied using electrochemical impedance spectroscopy (EIS) and quasi-elastic neutron scattering…
The effect of grain boundary conductivity on the poling process and the nonlinear electromechanical behaviors of ferroelectric polycrystals are investigated through the use of a phase field model. The grain boundary is modeled as a semiconductor in the phase field model via Maxwell's equations, which consider the drif…
During the machining of carbon nanotube (CNT)-polymer composites, the interface plays a critical role in the load transfer between polymer and CNT. Therefore, the interface for these composites has to be explicitly considered in the microstructure-level finite element (FE) machining model, so as to better understand t…
We demonstrate that the morphological diversity in liquid-crystal hybrid systems is much richer than previously anticipated. More importantly, we reveal the existence of a dual mechanism for self-assembly of nanoparticles via morphological instabilities at phase boundaries. Using numerical simulations, we study the gr…
The arrays of metallic nanowires are considered as promising precursors for 1D semiconductor nanostructures after appropriate treatment at temperatures close to the melting point. Therefore the melting behaviour of the metallic structures in oxide templates is a key parameter for the subsequent conversion process. The…
Dynamic magnetoelectric coupling in the improper ferroelectric ${\mathrm{Cu}}_{1\ensuremath{-}x}{\mathrm{Zn}}_{x}\mathrm{O} (x=0,x=0.05)$ was investigated using terahertz time-domain spectroscopy to probe electromagnon and magnon modes. Zinc substitution was found to reduce the antiferromagnetic ordering temperature a…
Fructose-1,6-bisphosphate activates ADP-glucose pyrophosphorylase and the synthesis of glycogen in Escherichia coli. Here, we show that although pyruvate is a weak activator by itself, it synergically enhances the fructose-1,6-bisphosphate activation. They increase the enzyme affinity for each other, and the combinati…
This work presents two easy ways for preparing nanostructured mesoporous composites by interconnecting and combining SBA-15 with mixed oxides derived from a calcined Mg-Al hydrotalcite. Two different Mg-Al hydrotalcite addition procedures were implemented, either after or during the SBA-15 synthesis (in situ method).…
This study concerns the interactions of two chemically different materials h BN (covalent‐ionic bonds) and M o S 2 (covalent‐ionic and dispersive bonds) with bacteria and fungi. The materials used in the study were in the form of micro‐ and nanocrystals. Countable inactivation of microorganisms ( Staphylococcus aureus…
The theoretical results are presented showing that strain-induced anisotropy of graphene spectrum gives rise to the valley currents under the illumination by normally incident light. The currents of the two graphene valleys are mutually compensated providing zero net electric current. The magnitude and direction of th…
A detailed theoretical first-principles study of structural, electronic, and hyperfine properties at Sn and Ta sites of undoped and Ta-doped rutile SnO 2 is presented, using the Full-Potential Augmented Plane Wave plus local orbitals (FP-APW+lo) method. In the Ta-doped systems, we performed calculations for two differ…
Magnetic properties of polycrystalline spinel ferrites are of significant interest in scientific community. Of all, initial permeability is most important magnetic property for device fabrication. M n– Z n and N i– Z n ferrites are commercially most successful class of ferrites. Ferrites accommodate variety of cations…
Single nitrogen-vacancy (NV) centers in diamond coupled to neighboring nuclear spins are promising candidates for room-temperature applications in quantum information processing, quantum sensing and metrology. Here we report on a systematic density functional theory simulation of hyperfine coupling of the electronic s…
CpFe(CO)2(CH2)6PPh2 (FpC6P) is synthesized as a monomer for bulk migration insertion polymerization (MIP). Due to the presence of a longer alkyl spacer in FpC6P, intramolecular cyclization reactions, which are observed during the MIP of CpFe(CO)2(CH2)3PPh2 (FpC3P), were completely suppressed under the conditions of th…
A hybrid cell sheet engineering approach was developed using ultra-thin nanofiber arrays to host the formation of composite nanofiber/cell sheets. It was found that confluent aligned cell sheets could grow on uniaxially-aligned and crisscrossed nanofiber arrays with extremely low fiber densities. The porosity of the n…
For the first time a liquid crystalline azobenzene-containing side-chain copolymer was employed as matrix material for distributed feedback lasers based on orientation gratings. Effective polarization gratings with periods of 245–290 nm could be inscribed within just one second using moderate light intensity. Using a…
Localized sp–d exchange interaction in ferromagnetic Ga1−xMnxAs observed by magnetic circular dichroism spectroscopy of L critical points, Tanaka, H, Jadwisienczak, W M, Saito, H, Zayets, V, Yuasa, S, Ando, K
Control of polarization dependences of thermo-optic (TO) coefficients, i.e., the temperature dependence of birefringence (d(Δn)/dT), is critical issue for optical materials. Especially in active optical components like TO switches, polarization dependent behaviors are caused by d(Δn)/dT of materials. Origins of polari…
We report the synthesis, characterization, and application of novel zwitterions. The zwitterionic structures consist of a positively charged cyanine and negatively charged dienolate moieties, confirmed by experimental observations and theoretical calculations. Single crystal X-ray studies revealed that BIT-(NPh)2 is a…