Materials Literature
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Novel PZT-5A ceramic-polymer composite was prepared via freezing technology. This composite exhibited good dielectric and ferroelectric behaviors. At 1 kHz, the dielectric constant and the dielectric loss were 546 and 0.046, respectively, while the remnant polarization was 13.0 μC/cm(2) at room temperature. The electr…
Both S(1) and T(1) energy transfer rates (porphyrin → cluster) increase from mono- to di- to tetracarboxylate[tetraphenyl-(zinc)porphyrin] adducts with [Pd(3)(dppm)(3)(CO)](2+) clusters.
ABSTRACT In this study, ground calcium carbonate (GCC) was modified by Layer-by-Layer (LbL) multilayering with polyelectrolytes. Cationic polyacrylamide (C-PAM) and poly sodium 4-styrene sulfonate (PSS) were used as cationic and anionic polyelectrolytes to modify GCC. The characteristics of the modified GCC were exami…
Upright Ag nanoplates on a nanoparticulate TiO(2) film are oriented on the basis of plasmon-induced charge separation. Polarized visible light removes nanoplates oriented perpendicularly to polarization via excitation of in-plane transverse mode. Polarized near-infrared light removes nanoplates in parallel geometry vi…
A new procedure for functionalization of the dihydroazulene photoswitch on its seven-membered ring was developed, which has allowed isolation of the first dihydroazulene with a phenyl substituent at position 5 from a mixture of regioisomers. Light-induced ring-opening to the corresponding vinylheptafulvene and the the…
This paper addresses the use of graft polymer layers as spacers to control interparticle distance in 2-dimensional monolayers. Gold nanoparticles grafted with thermosensitive PNIPAM-based polymers with a large range of molecular mass and different degrees of hydrophobicity have been studied. The hydrophobicity of the…
A novel quaternary mercury and cadmium chalcogenidehalide, (Hg2Cd2S2Br)Br (1), has been prepared by solid-state reaction and structurally characterized by single crystal X-ray diffraction analysis. The structure of 1 is composed of parallel slabs stacking with -ABAB- mode via linearly coordinated Hg atoms to form a 3D…
Hydrogenated amorphous carbon nitride (a-CNx:H) films were formed on p-Si wafers set on a lower elec-trode by pulsed supermagnetron plasma CVD using i-C4H10 and N2 gases. Lower electrode RF power (LORF) of 13.56 MHz (50 - 800 W) was modulated by a 2.5-kHz pulse at a duty ratio of 12.5%, and upper electrode RF power (U…
The preparation of new types of poly(imide-urea)s (PIUs) with high thermal stability and improved solubility was investigated. Three series of aromatic poly(imide-urea)s (PIUOa-c, PIUSa-c, and PIUNa-c) bearing pendent benzoxazole, benzothiazole or benzimidazole rings were prepared by one-pot polycondensation reaction…
This paper introduces a high performance thermal interface material (TIM) with vertically aligned graphite. The main structure of the TIM is a vertically laminated structure, in which thin solder layers are laminated with aligned graphite layers. Unlike traditional TIMs infiltrated with randomly oriented high conducti…
Ba ( Ti 0.96 Sn 0.04 ) O 3 and CuO -modified Ba ( Ti 0.96 Sn 0.04 ) O 3 ceramics were prepared by the solid state reaction technique. Their piezoelectric properties were investigated and compared with those of the recently obtained high-d 33 BaTiO 3 ceramic. It has been found that simply substituting Ti 4+ with Sn 4+…
Caged compounds are widely utilized for light-triggered control of biological and chemical reactions. In our study we investigated the photo-induced decarboxylation of all three constitutional isomers of nitrophenylacetate (NPA), which can be regarded as caged-CO(2). UV-pump/IR-probe spectroscopy was used to directly…
A series of catastrophic failures between alloy 625 weld metal (referred to as ‘A625’) and AISI 8630 low alloy steel forgings (referred to as ‘8630’) on cathodically-charged subsea equipment demonstrate the need to gain a better understanding of the hydrogen-induced tearing resistance of these interfaces as well as si…
In the present study, we combine high-resolution synchrotron powder diffraction with SEM to shed additional light on the arrangement of an intra-crystalline organic matrix in the nacre from red abalone. SEM observation and synchrotron diffraction analysis show that an intra-crystalline organic matrix exists inside nac…
We have modified scanning transmission x‐ray microscopes (STXM) at the Canadian Light Source and the Advanced Light Source with total electron yield (TEY) detection (TEY‐STXM). This provides improved surface‐sensitive detection, simultaneous with existing bulk‐sensitive transmission detection in the STXM microscopes.…
Thanks to the low cost and good formability of thermoplastic materials, thermoforming process is widely used in plastic processing. However, some problems remain to be solved, notably the non-uniform thickness distribution caused by uneven energy distribution in the plastic sheet during infrared heating. To overcome t…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation M. E. Keillor, C. E. Aalseth, A. R. Day, L. E. Erikson, J. E. Fast, B. D. Glasgow, E. W. Hoppe, T…
Acoustic properties of the ferroelectric PbTiO3 single crystals were studied at temperatures near the phase transition temperature (T c) by Brillouin scattering and compared to those of BaTiO3. The Brillouin frequency shift of the longitudinal acoustic mode of PbTiO3 showed a mild softening and a subsequent discontinu…
The surface enhanced Raman scattering (SERS) spectrum of methylene blue (MB) was studied when adding a range of halideions to borohydride-reduced silver colloid. The halideions such as chloride, bromide and iodide were added as aggregating agents to study the effects of halideions on SERS spectroscopy of MB and observ…
Barium strontium titanate (BST) nanocrystals with quasi-spherical shapes and average particle-sizes ranging from 20 to 80 nm were synthesized without contamination from mineralizers through a microwave-activated glycothermal (MG) approach. The synthesized BST nanocrystals under different MG conditions were structurall…