Materials Literature
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Leakage current characteristics of (Bi0.86Pr0.14)(Fe0.95Mn0.05)O3 (BPFMO) thin films are studied at various temperatures from 293 down to 93 K. Space charge limited current and Poole–Frenkel (PF) emission are found to be the dominant mechanism in the low and the high electric fields, respectively. The trap ionization…
In this paper, we describe the preparation of hydrogels through the formation of an inclusion complex of amylose in a vine-twining polymerization. This is achieved by the phosphorylase-catalyzed polymerization of alpha-D-glucose 1-phosphate from maltoheptaose primer, in the presence of a water-soluble copolymer having…
Well-ordered (111)-oriented ceria thin films with Ti dopant were prepared by simultaneous introduction of Ce and Ti onto Ru(0001) at 700 K with oxygen pressures higher than 2 × 10 −7 Torr. XPS data indicate that the incorporation of Ti in ceria causes the partial reduction of Ce from the +4 to +3 state. Ti is formally…
For precise characterizations of single-walled carbon nanotubes (SWCNTs) by optical absorption spectroscopy, the background extinction that originated from precipitable impurities and SWCNT bundles has been experimentally determined by the interval centrifugation and difference spectrum (IC-DS) technique. The baseline…
The analysis of plasma polymerisation processes by the use of macroscopic scaling parameters has been pioneered by Yasuda in 1978. His concept has been further developed and expanded by Rutscher in 1985 by introducing the concept of chemical equilibria expressed as reactor parameters. Recently, a unified scaling is pr…
The hyperfine field is an important probe of the magnetism of solids, yet its calculation from the first principles in the compounds of $3d$ metals proved to be difficult. For iron we circumvent this problem by calculating the spin magnetic moments of the $3d$ electrons and the valence $4s$ electrons and express the c…
New antimicrobial microfibrous electrospun mats from styrene/maleic anhydride copolymers were prepared. Two approaches were applied: (i) grafting of poly(propylene glycol) monoamine (Jeffamine® M-600) on the mats followed by formation of complex with iodine; (ii) modification of the mats with amines of 8-hydroxyquinol…
Abstract Several composites of poly( L ‐lactic acid) (PLLA) with natural fibers (kenaf and rice straw) and pigments have been prepared and analyzed. The study of the thermal behavior has shown a rather important nucleation ability of these fillers for the crystallization of the PLLA component in the composites. Thus,…
Ultrasmall superparamagnetic iron oxide (USPIO) particles are very useful for cellular magnetic resonance imaging (MRI), which plays a key role in developing successful stem cell therapies. However, their low intracellular labeling efficiency, and biosafety concerns associated with their use, have limited their potent…
We have demonstrated the fabrication of horizontally aligned carbon nanotube (CNT) bundles on Si substrate for interconnect line application. By controlling the catalyst thickness, we fabricated multi-walled CNT and few-walled CNT bundles with different diameters. We measured the resistances of the CNTs as a function…
When a Mott metal-insulator transition is inhibited by a small amount of disorder in the layered dichalcogenide $1T{\text{-TaS}}_{2}$, an inhomogeneous superconducting state arises below $T=2.1\text{ }\text{K}$ and coexists with a nearly commensurate charge-density wave. By angle-resolved photoelectron spectroscopy, w…
Superhydrophobic surfaces generally involve completely nonwetting or partially wetting roughness. Because the contact angle is closely related to the liquid-gas interfacial tension, the shape of the liquid-gas interfaces within the grooves plays a key role in determining the droplet wetting behavior. We consider a dro…
A superlattice structure of planar metamaterial is fabricated, where the orientation of double-split ring resonators is altered in a periodic way. A time-domain terahertz transmission spectrum shows an enhanced Q-factor resonance appears when a closed mode is selectively excited by angular tuning of polarization direc…
Abstract Wollastonite is treated with a new surface modifier (malonic acid). The influence of malonic acid treatment on the crystallization and mechanical properties of polypropylene (PP)/wollastonite composites has been studied. The results of differential scanning calorimetry, wide angle X‐ray diffractometry, and po…
Mechanical exfoliation is nowadays the primary method to produce isolated graphenes. A stripe/kink microstructure is observed in our graphite flakes produced by mechanical exfoliation of highly oriented pyrolytic graphite (HOPG). It composes a series of parallel stripes with width of about 100 microns separated by kin…
Magnetoelectric (ME) effect has been studied in a device of Pb(Zr0.52Ti0.48)O3 (PZT) drum transducer, NdFeB magnet, and Fe-core solenoid. A unique ME effect is found to originate from the magnetic force-induced effectively amplified piezoelectric effect. Under the application of a magnet with dimensions of ϕ22×7.6 mm2…
Three issues are most critical in fuel processors which are integrated with polymer electrolyte membrane (PEM) fuel cells for power generation: the steam reformer configuration, which must ensure very rapid heat transfer to the reformation zone, the development of highly active catalysts for the water−gas shift (WGS)…
Many studies have shown that the dynamic motions of individual protein segments can play an important role in enzyme function. Recent structural studies of the gluconeogenic enzyme phosphoenolpyruvate carboxykinase (PEPCK) demonstrate that PEPCK contains a 10-residue Omega-loop domain that acts as an active site lid.…
We use the Debye model to investigate the phonon scattering mechanisms in BaxREyCo4Sb12 double-filled skutterudites. Filling two types of guest atoms (barium and rare-earth elements) into the voids of skutterudite introduces additional phonon point defect scattering from the extra mass fluctuation at the void site, an…
We investigated the influence of oxygen deficiency on the Fermi level (EF) of ZnO thin film prepared by pulsed laser deposition (PLD). For this purpose, we adopted in situ x-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. The oxygen deficiency was effectively controlled by varying the oxygen…