Materials Literature
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Critical current density was studied by direct electrical transport measurements in single crystals of Ba(Fe 1 − x TM x ) 2 As 2 under magnetic fields up to 9 T. To understand the relation of the critical current to the structural transformations in the material, the electron doping level was controlled by the amount…
Past molecular dynamics (MD) studies of boron nitride nanotubes (BNNTs) have used van der Waals parameters from generic force fields, combined with various values for the partial charges on the boron and nitrogen atoms. This study explores the validity of these parameters by first using quantum chemical packages Car-P…
We report a numerical study on heat conduction in one-dimensional homogeneous lattices in both the linear and the nonlinear response regime, with a comparison among three prototypical nonlinear lattice models. In the nonlinear response regime, negative differential thermal resistance (NDTR) can occur in both the Frenk…
Abstract Low pressure setups (up to 150 psi) for creating hydrodynamic cavitation are investigated in this study. The decomposition of chloroform in water is used as a model reaction. The effects of upstream pressure, fluid velocity, Cavitation number, C v , and β 0 on the conversion are compared with regard to the ef…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTConfinement Effects on Chain Dynamics and Local Chain Order in Entangled Polymer MeltsSalim Ok, Martin Steinhart, Anca Şerbescu†, Cornelius Franz, Fabián Vaca Chávez‡, and Kay Saalwächter*View Author Information Institut für Chemie, Uni…
α-K x MnO 2 nanotubes with x = 0.10, 0.12, 0.15, and 0.17 have been synthesized through acid and alkali treatments of the precursor α-MnO 2 nanotubes. For the samples with x = 0.10 and 0.12, a large divergence of the ZFC and FC susceptibilities and pronounced hysteresis at low temperature are observed. However, the sa…
The triple-helical structure of collagen peptides has recently been harnessed as a subunit in the higher-order assembly of unique biomaterials. Specific assembly signals have been designed within collagen peptides, including hydrophobic groups, electrostatic interactions, and metal-ligand binding, to name a few. In th…
Low-potential electrochemical polymerization of a series of aromatic ethers in boron trifluoride diethyl etherate (BFEE), such as diphenyl ether (DPE), 1,4-diphenoxybenzene (DPOB), and 2,2′-dinaphthyl ether (DNE), led to successful deposition of a new class of electrically conducting proton-doped poly(aromatic ethers)…
Oxygen vacancy plays a critical role in most enhanced performances of ceria-based materials. In this study, a facile hydrothermal method was developed for the synthesis of one-dimensional rare-earth doped ceria: Ce 1− x Y x O 2− x /2 (0≤ x ≤ 1). The doping concentration could be as high as 90% and the oxygen vacancies…
Dielectric spectroscopy (DS) was used to investigate the relaxation dynamics of supercooled and glassy ibuprofen at various isobaric and isothermal conditions (pressure up to 1750 MPa). The ambient pressure data are in good agreement with that reported previously in the literature. Our high pressure measurements revea…
It is envisioned that for the regeneration of highly organized structures, like tendon and ligaments, only aligned fibrous scaffolds can provide adequate topographic guidance to cells. In this study, a novel method to electrospin an aligned scaffold is presented. Electrospun fibres were deposited into a water bath and…
We report a synthesis of a closely packed multi-walled carbon nanotube (MWCNT) forest by a multi-step growth method, including a new approach to immobilize catalytic nanoparticles, using plasma-based chemical vapor deposition. The CNT packing density reaches one-half of the theoretical value, where the space of 30–40%…
The surface-enhanced Raman spectroscopy (SERS) activity and the optical reflectance of a subwavelength gold nanograting fabricated entirely using top down technologies on silicon wafers are presented. The grating consists of 120 nm gold cladding on top of parallel silica nanowires constituting the grating's lines, wit…
The electrical conductivity of the switching channel of vanadium dioxide thin-film sandwich structures is studied over a wide temperature range (15–300 K). It is shown that the electrical resistance of the channel varies with temperature as R ∼ exp(aT − b/T) in the high-temperature region (above 70 K). The experimenta…
Systems in which a short-ranged attraction and long-ranged repulsion compete are intrinsically frustrated, leading their structure and dynamics to be dominated either by mesoscopic order or by metastable disorder. Here, we report the latter case in a colloidal system with long-ranged electrostatic repulsions and short…
Using density functional theory (DFT), a detailed analysis of the energetic and electronic properties of monolayer graphene on Ru(0001) was performed. Firstly, we demonstrate that the corrugated (12 × 12)C/(11 × 11)Ru structure is an absolute minimum among smaller and larger commensurabilities. Secondly, we show that…
Light switching of the activity of a coiled-coil protein, the AP-1 transcription factor, in living cells was made possible by the introduction of a designed azobenzene-cross-linked dominant negative peptide, XAFosW (red and yellow in the picture). In the dark, XAFosW showed decreased helical content and decreased affi…
Yb(2+) and Yb(3+) co-activated luminescent material that can cut one photon in ultraviolet and visible region into multi NIR photons could be used as a downconversion luminescent convertor in front of crystalline silicon solar cell panels to reduce thermalization loss of the solar cell. After a direct excitation of Yb…
This paper describes a numerical experiment, based on full micromagnetic simulations of current-driven magnetization dynamics in nanoscale spin valves, to identify the origins of spectral linewidth broadening in spin torque oscillators. Our numerical results show two qualitatively different regimes of magnetization dy…
The perovskite SrTiO3-LaAlO3 structure has advanced to a model system to investigate the rich electronic phenomena arising at polar oxide interfaces. Using first principles calculations and transport measurements we demonstrate that an additional SrTiO3 capping layer prevents atomic reconstruction at the LaAlO3 surfac…