Materials Literature
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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…
We report on the carrier-induced ferromagnetism in Ge(Mn,Fe) magnetic semiconductor insulating-type thin-film structures prepared using sequential deposition at Tg=520K with subsequent annealing at Tg. In the resulting films Mn and Fe are diffused in the Ge matrix without compromising the epitaxial structure. The anom…
We report on a simple nonequilibrium solvothermal synthesis of Co-doped ZnO diluted magnetic semiconductor (DMS) nanocrystals. The crystal growth mechanism of imperfect three-dimensionally oriented attachment was revealed by the high-resolution transmission electron microscopy. The shallow donorlike defects as the leg…
We describe simple procedures for fabricating single polymeric helical nanofibers and converting these helical nanofibers into linearly oriented nanofibers using a modified electric field in an electrospinning system. Helical structures were made from a solution of poly(2-acrylamido-2-methyl-1-propanesulfonic acid) in…
Abstract The new compound Mn 2 (C 5 H 14 N 2 )Sb 2 S 5 (C 5 H 14 N 2 = 1,3‐diaminopentane, DAPE) was prepared under solvothermal conditions using the elements as starting materials. The compound crystallizes in the orthorhombic space group Pbca with the lattice parameters a = 12.620(3), b = 11.877(2) and c = 21.814(4)…
When an alternating magnetic field by a figure-of-eight coil is applied to a circular magnetostrictive patch bonded to a plate, ultrasonic guided waves can be effectively generated and measured. Wave experiments with two transducers consisting of the coil and the patch show that the magnitude and type of the measured…
Abstract Summary: Salicylic acid‐doped hollow polyaniline and rhodamine B composite spheres (1.9–3.3 µm in average diameter) with a high conductivity (≈10 −1 S · cm −1 ) and a strong fluorescence were synthesized by a template‐free method. The morphologies, electrical and fluorescent properties of the hollow composite…
We report on the transport and optical properties of Ni doped ZnO polycrystalline samples. Ni doping in ZnO could be achieved to a small concentration (2mol%). Diffuse reflectance spectroscopy of doped ZnO showed the existence of d-d transition bands at 430, 580, and 655nm which are characteristic of Ni (II) with tetr…