Materials Literature
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A new Ru(L)(dcbpy)(NCS)2 dye containing a pyrrole-based pi-extended ligand has been prepared and showed very good light harvesting ability with near 70% IPCE in the visible region. The performance is very close to those of the standard N3 with a wider absorption range.
We study the relaxation process in a simple glass former--the Kob-Andersen lattice gas model. We show that, for this model, structural relaxation is due to slow percolation of regions of cooperatively moving particles, which leads to heterogeneous dynamics of the system. We find that the size distribution of these reg…
The electronic structure and spectroscopic properties of two ternary aluminum silicon carbide ceramics ${\text{Al}}_{4}{\text{SiC}}_{4}$ and ${\text{Al}}_{4}{\text{Si}}_{2}{\text{C}}_{5}$ are studied by density functional theory calculations based on the orthogonalized linear combination of atomic orbitals method. Bot…
Abstract The known 5,5′‐diformyl‐3,3′‐bis(methoxycarbonylethyl)‐4,4′‐dimethyl‐2,2′‐bipyrrole was employed in the preparation of biomimetic functional porphyrinoids. Tetrapyrrolic 2,2′‐bidipyrrins could be obtained from condensations with two equivalents of 3,4‐dialkyl‐2‐methylpyrroles. From these compounds, a manganes…
An elastoviscoplastic finite element model of aluminum alloys is used to compare mechanical response among meshes formed with several different grain shapes. Tetrahedral elements are used to form grains of cubic, rhombic dodecahedral and truncated octahedral shape. The influence of the grain shape on the aggregate res…
We experimentally confirm the existence of the radial breathing mode in CdSe nanorods by Raman spectroscopy, which was deduced from ab initio calculations of the vibrational properties of bare CdSe nanowires and CdSe/ZnS core-shell nanowires. We calculated the modes' frequency for various diameters and measured a set…
The synthesis of chiral liquid-crystalline polymers of well-controlled structure (linear and three-armed star-shaped) with distinct average chain lengths and low polydispersity was achieved by atom transfer radical polymerisation (ATRP) of a new optically active monomer (S)-4-[6-(2-methacryloyloxypropanoyloxy)hexyloxy…
Abstract First‐principles calculations based on the density functional theory and the generalized gradient approximation were carried out to systematically investigate the electronic structure and linear optical properties of lead tetraborate (PbB 4 O 7 ; PTB) single crystals. An indirect band gap of 4.34 eV is obtain…
The effect of structural and chemical disorder on magnetism of Mn-implanted 3C-SiC epilayer on Si(100) is investigated experimentally using Rutherford backscattering channeling spectroscopy (RBS/C), x-ray diffraction (XRD), micro-Raman spectroscopy $(\ensuremath{\mu}\text{RS})$, and magnetometry, and theoretically usi…
Epitaxial thin films of ${\text{LaCoO}}_{3}$ $(e\text{-LCO})$ exhibit ferromagnetic order with a transition temperature ${T}_{C}=85\text{ }\text{K}$ while polycrystalline thin ${\text{LaCoO}}_{3}$ films $(p\text{-LCO})$ remain paramagnetic. The temperature-dependent spin-state structure for both $e\text{-LCO}$ and $p\…
Rh catalysts supported on ZrO(2)-based oxides were studied for ethanol steam reforming (SR) reaction. Pure ZrO(2) as the support resulted in higher H(2) production yield compared to the ZrO(2) oxide decorated with CeO(2), Al(2)O(3), La(2)O(3) or Li(2)O at the reaction temperature of 300 degrees C. Above 450 degrees C,…
Texaphyrins are pentaazadentate macrocycles with interesting photophysical properties and potential applications as nonlinear optical (NLO) materials, photosensitizers, magnetic resonance imaging (MRI) contrasting reagents, and radiation sensitizers, etc. To further red-shift the Q-like band of the texaphyrins, a benz…
Assembly of colloidal particles in nematic liquid crystals is governed by the symmetry of building blocks and type of defects in the liquid crystalline orientation. Particles in a nematic act as nucleation sites for topological defect structures that are homotopic to point defects. The tendency for a minimal deformati…
Abstract Here we report a cost effective and versatile way of synthesizing and assembling multi‐functional (e.g., gold‐polypyrrole‐nickel‐gold) nanowires. Multisegmented nanowires were synthesized using electrodeposition method for precise control over segment dimensions for proper expression of material functionality…
The synthesis, crystallographic and spectroscopic properties of four divalent isomorphous metal complexes of tetraphenylazadipyrromethene are described.
C/ZrB 2 –SiC composites were fabricated by polymer infiltration and pyrolysis combined with slurry impregnation method. Three kinds of coating structures for these composites were applied in order to improve their ablation resistance: pure silicon carbide coatings, ZrB 2 –SiC mixture coatings, and ZrC–SiC alternating…
Ion beam implantation has been used not only to modify some properties of the bulk materials but also to construct waveguide structures in many optical substrates by accurate control the refractive index in selected regions. This paper reviews the recent development of ion beam implantations on fabrication of two-dime…
We calculated the temperature dependence of the Debye-Waller factors for a variety of group IV, III-V and II-VI semiconductors from 0.1 to 1000 K. The approach used to fit the temperature dependence is described and resulting fit parameters are tabulated for each material. The Debye-Waller factors are deduced from gen…
Photoactivatable organic fluorophores and fluorescent proteins have been widely adopted for cellular imaging and have been critical for increasing temporal and spatial resolution, as well as for the development of superresolution microscopy techniques. At the same time, semiconducting nanocrystal quantum dots (QDs) ha…
Self-destruct mechanism: Gold multipods are formed by a galvanic replacement reaction of AuCl with a self-destructive template consisting of a three-dimensional aggregate of magnetic iron nanoparticles. As a unique feature of this system, the template spontaneously falls apart during the reaction to automatically rele…