Materials Literature
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We use a free energy lattice Boltzmann approach to investigate numerically the dynamics of drops moving across superhydrophobic surfaces. The surfaces comprise a regular array of posts small compared to the drop size. For drops suspended on the posts the velocity increases as the number of posts decreases. We show tha…
The (001) surface of NiO, an antiferromagnet at room temperature, was investigated under ultra-high vacuum conditions with frequency modulation atomic force microscopy (FM-AFM). The antiferromagnetic coupling between ions leads to a spin superstructure on (001) surfaces. Exchange interaction between the probe of a for…
Interactions between atoms of bound single-walled carbon nanotubes (SWNTs) are known to cause measurable distortion to the tube's original circular cross-section frame. High-resolution transmission electron microscope (TEM) investigation was used here to directly image and verify these radial deformations. The data pr…
Expressions are given for the maximum and minimum values of Poisson's ratio ν for materials with cubic symmetry. Values less than −1 occur if and only if the maximum shear modulus is associated with the cube axis and is at least 25 times the value of the minimum shear modulus. Large values of occur in directions at wh…
A systematic, quantitative study of the effect of interface roughness and disorder on the magnetoresistance of FeCo$|$vacuum$|$FeCo magnetic tunnel junctions is presented based upon parameter-free electronic structure calculations. Surface roughness is found to have a very strong effect on the spin-polarized transport…
The microstructural development of crystalline‐oriented (K 0.5 Na 0.5 )NbO 3 (KNN)‐based piezoelectric ceramics during sintering was investigated. The addition of CuO as a sintering aid was found to be effective for fabricating highly oriented and dense KNN ceramics. KNN specimens containing 0.5–1.0 mol% CuO sintered…
Recent advances in the science and technology of composites utilizing carbon nanostructures are reviewed, including experimental results and modelling studies of composite properties and processing. Carbon nanotubes are emphasized, with other carbon nanostructures such as fullerenes, ultradispersed diamond clusters an…
An atomistic Green’s function method is developed to simulate phonon transport across a strained germanium (or silicon) thin film between two semi-infinite silicon (or germanium) contacts. A plane-wave formulation is employed to handle the translational symmetry in directions parallel to the interfaces. The phonon tra…
We report the development and in vitro study of a nanoconjugate serving as a targeted magnetic resonance imaging (MRI) contrast enhancement agent for detection of cancer cells overexpressing the folate receptor. The nanoconjugate was synthesized by coating superparamagnetic iron oxide nanoparticles with covalently bou…
An energetic particle collision analysis of the effect of Ar+ ion bombardment on tetrahedral carbon hybridization (sp3) in amorphous carbon (a-C) thin films is presented for nonmagnetron radio-frequency sputtering. The analysis is based on sequential surface events involving the collision of Ar+ ions with carbon atoms…
HACN (homoaconitase) is a member of a family of [4Fe-4S] cluster-dependent enzymes that catalyse hydration/dehydration reactions. The best characterized example of this family is the ubiquitous ACN (aconitase), which catalyses the dehydration of citrate to cis-aconitate, and the subsequent hydration of cis-aconitate t…
Wurtzite ZnO∕MgO superlattices were grown on Si (001) substrates at 750°C with a radio-frequency reactive magnetron sputtering method. X-ray diffraction analysis revealed the superlattice to be a highly textured ZnO (001) layer and to be of high crystallinity and homogeneity in thickness. The periodic layer thickness…
We present a theoretical analysis based on self-consistent numerical simulations of current-driven interactions between voids in metallic thin-film interconnects and the resulting void migration, morphological evolution, and coalescence phenomena. The analysis reveals the complex nature of electromigration-induced voi…
We have studied the current-voltage (I-V) characteristics and resistance switching at the interface between metal electrodes M (=Pt, Au, Ag, Al, Ti, and Mg) and atomically flat cleaved (001) surfaces of La1−xSr1+xMnO4 (x=0–1.0) single crystals by using a three-probe method. Hysteretic I-V characteristics, indicating t…
Abstract Synthesis and Crystal Structure Determination of Lead(II) Oxide Halide Alcoholates with Different Connectivity of Pb 4 O 4 Heterocubane‐like Subunits The reaction of red lead(II) oxide (Litharge) and lead(II) halide (Cl − and Br − ) with diethylene glycole at a temperature of 180 °C leads to the isotypic comp…
The iodine-containing cationic type-I clathrates Ge38Sb8I8 and Sn38Sb8I8 were prepared and their thermodynamic properties as well as their thermoelectric properties were investigated. Their atomic displacement parameters were as large as those of anionic clathrates such as Ba8Ga16Ge30 and Cs8Cd4Sn42. The room temperat…
A first-principles electronic structure study is performed to determine the optical and static polarizability tensors of various phthalocyanine (Pc) derived molecules, including H2Pc, CuPc, and MgPc. It is found that the dominant contribution to the polarizability is electronic in origin, and that the metal atoms only…
The ferroelectric and piezoelectric properties of (100)-oriented BiScO3–PbTiO3 (BSPT) thin films were investigated. (100)-oriented 0.34BiScO3–0.66PbTiO3 thin films were synthesized on Pt(111)∕Ti∕SiO2∕Si(111) substrates using a modified sol-gel method. Saturated polarization hysteresis loops were observed, showing a re…
Using a simple process of the deposition of ZnO thin films on SiOx∕Si substrates and subsequent thermal annealing, we fabricated ZnO quantum dots embedded in silicon oxide matrix. The ZnO quantum dots were characterized using transmission electron microscopy, and time-integrated and time-resolved photoluminescences. W…
Abstract PdAs 2 O 6 , the First Paramagnetic Palladium Oxide Ssolid state reaction of palladium(II) oxide (PdO) and arsenic(V) oxide (As 2 O 5 ) yielded an auburn colored microcrystalline powder of palladium(II) metaarsenate(V), PdAs 2 O 6 . The crystal structure of the compound belongs to the PbSb 2 O 6 structure typ…