Materials Literature
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An investigation of amorphous, pyrolytic carbon for semiconductor applications is presented. We have deposited conductive carbon films on thin silicon oxide and aluminum oxide dielectrics and structured them into metal-insulator-silicon (MIS) capacitors in order to evaluate their electrical properties. The results sho…
Water-dispersible PEGylated nanoparticles (NPs) presenting amine-reactive conjugation sites at their surfaces were synthesized and their ability to react with amines was demonstrated. An amphiphilic block copolymer bearing an N-succinimidyl ester at its water-soluble end was synthesized by the consecutive controlled r…
A recombinant DNA ligase from Sulfophobococcus zilligii that shows multiple cofactor specificity (ATP, ADP and GTP) was expressed in Escherichia coli and purified under reducing conditions. Crystals were obtained by the microbatch crystallization method at 295 K in a drop containing 1 µl protein solution (10 mg ml(-1)…
Abstract To understand the etching phenomenon or preferential etching in the GaN crystal that consisted of two elemental atoms, dry etchings were carried out using rare gases with a simple structure. n‐type GaN crystals were RF‐plasma‐etched with Ar, Kr, and Xe gases at various gas pressures and etching times. The etc…
Transient capacitance measurements reveal new physics of metastable defect formation in boron-doped oxygen-containing crystalline silicon solar cells. These measurements demonstrate that holes are deeply trapped during defect formation and removed during thermal annealing with activation energy of 1.3 eV. Previous the…
Individual monitoring of aircrew of airline operators registered in the Czech Republic has been performed since 1998. In this work, annual effective doses and annual collective effective doses of aircrew from occupational exposure in the period from 1998 to 2008 are presented, methods used for their evaluation and ver…
Application of polarization transfer techniques such as DEPT and INEPT in (29)Si NMR investigation of bridged silane polymerization requires knowledge of indirect (29)Si-(1)H scalar coupling constants in the silane system. However, the fully coupled (29)Si NMR spectra of these molecules, specifically those containing…
The influences of biaxial and uniaxial strain on the ultraviolet emission efficiencies of both c- and m-plane AlxGa1−xN films with different Al concentrations are investigated under the framework of k⋅p perturbation theory. The optimal high efficiency windows, for ultraviolet light emissions are quantitatively estimat…
Crystalline oxides on Si with tailored electronic and crystallographic properties are of importance for the integration of functional oxides or alternative semiconductors to enable novel device concepts in Si microelectronics. We present an electronic band gap study of single crystalline Pr2−xYxO3 (0≤x≤2) heterostruct…
Hot phonon effects are of interest for heterostructure field effect transistors where heat dissipation depends on the lifetime of the longitudinal optical mode. Previous treatments have ignored the coupling of plasmon and phonons. Here, a bulk-phonon model is used to examine the effects of hot phonon-plasmon coupled m…
We construct a coarse-grained model of parallel actin bundles crosslinked by compact globular bundling proteins, such as fascin and espin, necessary components of filopodial and mechanosensory bundles. Consistent with structural observations of bundles, we find that the optimal geometry for crosslinking is overtwisted…
New C60 dimers 1, 2 and 3 that differ in the distance between the two balls, connected through pleiadene bridges have been synthesized. Different synthetic strategies have been used to prepare C60 dimers 1–3. A diastereoisomeric mixture was obtained for C60 dimer 1, which was separated by column chromatography and cha…
A bidimensional analysis of 6 mm hexagonal resonators is described using a double orthonormal basis set for the expansion of field quantities. The analysis takes into account the electrical voltage source and by means of a unique formalism along with a single calculation restitutes all the types of resonance whatever…
The stability of oxygen vacancies across the Ge–HfO2 interface is studied through semilocal and hybrid density-functional calculations. On the semiconductor side, the formation energies are obtained for substoichiometric GeOx of varying x through the use of a bond-energy model. On the hafnium oxide side, the interface…
Experimental study of ion sub-Larmor-scale turbulence by microwave scattering diagnostics developed at FT-2, DIII-D and NSTX tokamaks is reviewed. Peculiarities of electron temperature gradient (ETG) turbulence identification in dynamical experiments at these machines are discussed. The FT-2 experimental results conce…
Exchange bias properties have been investigated in a $({\text{Sm}}_{1\ensuremath{-}x}{\text{Gd}}_{x}{\text{Al}}_{2}/{\text{SmAl}}_{2})$ bilayer (for $x=0.028$) with perpendicular magnetization, an original exchange-coupled system based on the zero magnetization ferromagnet $({\text{Sm}}_{1\ensuremath{-}x}{\text{Gd}}_{…
Abstract A luminescent PtTFP/PMSP polymer coating was prepared for the oxygen partial pressure visualization inside a PEFC. PMSP formed a smooth and tough coating as a highly oxygen‐permeable matrix with a thickness of ca. 2 µm in which the PtTFP was homogeneously dispersed. The coating displayed a strong red luminesc…
The authors investigate efficiency roll-off in 5,6,11,12-tetraphenylnaphthacene (rubrene)-based mixed single layer top-emission organic light emitting devices by codoping with special additive dopants. The efficiency roll-off is suppressed after codoping rubrene with phenoxazone (Nile red). Due to dual nature of rubre…
Highly stable covalently attached multilayer films were constructed by visible-light irradiation of hydrogen-bonding directed multilayer films of poly(allylamine) and poly(4-vinylphenol).
The relationship between the photocatalytic activity and the arrangement of metal cations was investigated with Sr-Al-Nb-O double perovskite (SAN) synthesized at 1400 °C for various calcination times using a solid state reaction. Transmission electron microscopic observation revealed that SAN particles had a domain st…