Materials Literature
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Heterolayered Pb(Zr1−xTix)O3 (PZT) films consisting of alternating PbZr0.8Ti0.2O3 and PbZr0.2Ti0.8O3 layers, which were successfully synthesized via a multistep sol-gel route, demonstrate giant polarizations. They show (001)/(100) preferred orientation, the degree of which is strongly affected by both the combination…
In this paper, we report the characterization and analysis of the dc electrical characteristics of thin-film transistors fabricated from low-temperature chemical-bath-deposited CdS as the channel layer. Our analysis shows that the device can be operated either in the depletion mode or in the accumulation mode. In the…
The effects of the molecular variation of diarylethenes on the mesomorphic, photochromic, and fluorescence properties have been investigated, and dramatic changes in the fluorescence, photochromic, and liquid crystal behavior were observed.
Net optical gain in silicon nanocrystals (Si-nc) has been measured by pump and probe transmission experiments. Si-nc active layers have been produced by plasma enhanced chemical vapor deposition on transparent quartz substrates. Continuous and pulsed pump and probe transmission measurements have shown clear evidences…
We present free-space microwave measurements on composite metamaterials (CMMs) consisting of split ring resonators (SRRs) and wires either on the same dielectric board or on alternating boards. Our experimental results disprove the widely held belief that the occurrence of a CMM transmission peak within the stop bands…
The title compound is investigated by specific heat measurements in the normal and superconducting states supplemented by upper critical field transport, susceptibility, and magnetization measurements. From a detailed analysis including also full potential electronic structure calculations for the Fermi surface sheets…
Inner-sphere electron-transfer reorganization energies of Zn(protoporphyrin IX) and Zn(octaethylporphyrin) are determined from band-shape analyses of the first ionization obtained by gas-phase valence photoelectron spectroscopy. The experimentally determined total inner-sphere reorganization energies for self-exchange…
Several polycrystalline samples of bismuth layer-structured ferroelectrics (BLSF) family doped by lanthanum, Bi4−xLaxTi3O12, SrBi4−xLaxTi4O15, Sr2Bi4−xLaxTi5O18, and (Bi,La)4Ti3O12-Sr(Bi,La)4Ti4O15, were prepared by the traditional solid-state reaction method. Their ferroelectric and dielectric properties were investi…
Abstract The hydrogenation of natural rubber (NR) and various epoxidized natural rubbers (ENR) was investigated by using diimide generated in situ from the thermal decomposition of p ‐toluenesulfonylhydrazide (TSH) in o ‐xylene solution at 135°C. 1 H‐NMR analysis indicated that approximately 85–95% of hydrogenation wa…
We consider the problem of cooling a two-dimensional heat generating conducting volume with one heat sink, such that the smallest features of the internal structure are so small that the conventional description of conduction breaks down. The effective thermal conductivity exhibits the “size effect,” and is governed b…
Anthracites with different mineral matter content and composition but similar organic matter composition and, therefore, microtexture were obtained by consecutive immersion in mixtures of organic liquids of increasing density from an anthracite with a low degree of graphitizability, thus reducing the characteristics o…
Abstract Broken symmetry B3LYP‐DFT calculations on three‐ and four‐spin systems, namely the complexes [{Cu(bpca) 2 (H 2 O) 2 }{Cu(NO 3 ) 2 } 2 ], (bpca = Bis(2‐pyridylcarbonyl)amine), 1, and [Cu(DBSQ)(C 2 H 5 O)] 2 , (DBSQ = 3,5‐di‐ tert ‐butyl‐semiquinonato), 2, have been performed. A procedure to compute the exchang…
We have conducted electromigration experiments and modeling on Cu Damascene structures surrounded by different interlevel dielectric ILD and Cu-cap materials. We have determined the mechanical properties of the surrounding ILD and Cu cap to play a key role in the critical stress change to void nucleation (Δσcrit), whi…
Transport properties of polycrystalline TMGa3 (TM=Fe, Ru, and Os) compounds are reported in the temperature range 313K<T<973K. These compounds exhibit semiconductorlike behavior with relatively high Seebeck coefficient and electrical resistivity. Hall carrier concentrations at room temperature are report…
The residual stress in thin films is a major limiting factor for obtaining high quality films. We present a strategy for stress reduction in sputter deposited films by using a nanostructured compliant layer obtained by the oblique angle deposition technique, sandwiched between the film and the substrate. The technique…
Porous tungsten oxide nanoparticle films were prepared by reactive gas evaporation. The structure was studied by x-ray diffraction and scanning electron microscopy, and the oxygen nonstoichiometry was inferred by x-ray photoelectron spectroscopy, elastic recoil detection analysis, and neutron scattering. Specifically,…
We investigated the relationships among the deposition potential, the electric properties, and the thermoelectric properties of Bi2Te3 films electrodeposited from a solution containing 1.00mM TeO2 and 0.86mM Bi-EDTA complex. From the results of the Hall-effect measurements, the films formed at >−0.27V vs Ag∕AgC…
Boron nitride (BN) nanocage clusters (B n N n : n = 12–60), endohedral BN clusters Y@B n N n , and BN nanotubes were synthesized by an arc-melting method, and characterized by mass spectrometry and high-resolution electron microscopy. The BN clusters consisted of 4-, 6-, 8-, and 10-membered BN rings satisfying the iso…
In addition to a mirrorlike (${\mathrm{M}\mathrm{g}}_{2}\mathrm{N}\mathrm{i}$) and a transparent (${\mathrm{M}\mathrm{g}}_{2}{\mathrm{N}\mathrm{i}\mathrm{H}}_{4}$) state, thin films of ${\mathrm{M}\mathrm{g}}_{2}{\mathrm{N}\mathrm{i}\mathrm{H}}_{x}$ exhibit a remarkable black state with low reflection over the entire…
Singlets annihilated: A single-molecule fluorescence spectroscopic study of multichromophoric peryleneimide-substituted polyphenylene-core dendrimers under various conditions indicates that increased intersystem crossing (see graphic) as a consequence of an annihilation process might represent a general motif for incr…