Materials Literature
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Hollow ceria nanospheres were synthesized using anionic polystyrene lattices which were prepared by emulsion polymerization of styrene using potassium persulfate as the initiator. These anionic colloidal particles were dispersed in water in the presence of poly(vinylpyrrolidone) and mixed with aqueous solutions of cer…
Au nanoparticles fully coated with omega-ferrocenyl hexanethiolate ligands, with average composition Au225(omega-ferrocenyl hexanethiolate)43, exhibit a unique combination of adsorption properties on Pt electrodes. The adsorbed layer is so robust that electrodes bearing submonolayer, monolayer, and multilayer quantiti…
We use the surface integral technique for calculation of the extinction spectra of small metal particles of different shapes. We consider in detail different nonellipsoidal geometries in the electrostatic limit, including cylinders and a variety of capped cylinders. It is shown that different capping geometries have p…
A new colloidal route leading to the production of ∼99% dense 3‐mol% yttria‐stabilized zirconia nanostructured ceramics, while retaining a final average grain size of ∼75 nm, has been developed. The process was based on the production of stable, homogeneous nanosuspensions with solids contents of up to 28 vol% (70 wt%…
Multiferroic BiFeO 3 thin films of huge polarization have been successfully realized by using SrRuO 3 as a buffer layer on a Pt/TiO 2 /SiO 2 /Si substrate. They consist of a single perovskite phase and are nearly randomly orientated, where the SrRuO 3 buffer layer lowers the crystallization temperature and improves th…
Herein we report the carrier transport properties of [(SrTiO 3 ) x /(SrTi 0.8 Nb 0.2 O 3 ) 1 ] 20 ( x =0–50) superlattices at high temperatures ( T =300–900 K). Significant structural changes were not observed in the superlattices after annealing at 900 K in a vacuum. The Seebeck coefficient of the [(SrTiO 3 ) 20 /(Sr…
Abstract Dendrimers are well‐defined chemical polymers with a characteristic branching pattern that gives rise to attractive features such as antibacterial and antitumor activities as well as drug delivery properties. In addition, dendrimers can solubilize prion protein aggregates at very low concentrations, but their…
The thermal stability of bulk Ti 3 SiC 2 in high‐purity nitrogen was investigated. It was surprising to observe that Ti 3 SiC 2 underwent rapid and catastrophic disintegration above 1300°C, although this material was thermally stable below this temperature. This degradation was unexpected and extremely serious, and ha…
This paper explores reaction kinetics and mechanism for immobilized Humicola insolenscutinase (HIC), an important new biocatalyst that efficiently catalyzes non-natural polyester synthetic reactions. HIC, immobilized on Lewatit, was used as catalyst for epsilon-caprolactone (CL) and omega-pentadecalactone (PDL) ring-o…
Lead‐free piezoelectric ceramics in the system 0.95Na 0.5 K 0.5 NbO 3 –0.05LiTaO 3 were modified with ≤1 mol% MnO. Maximum densities occurred at a sintering temperature of 1050°C. Characteristic changes in the relative intensity of X‐ray diffraction peaks were consistent with Mn ions substituting on the perovskite lat…
Molecular Layer-by-Layer Growth of C60 Thin Films by Continuous-Wave Infrared Laser Deposition, Yaginuma, Seiichiro, Itaka, Kenji, Haemori, Masamitsu, Katayama, Masao, Ueno, Keiji, Ohnishi, Tsuyoshi, Lippmaa, Mikk, Matsumoto, Yuji, Koinuma, Hideomi
2-Hydroxyethyl methacrylate (HEMA) was used as initiator for the enzymatic ring-opening polymerization (ROP) of omega-pentadecalactone (PDL) and epsilon-caprolactone (CL). The lipase B from Candida antarctica was found to catalyze the cleavage of the ester bond in the HEMA end group of the formed polyesters, resulting…
The influence of p- and n-type electronic dopants on Mn incorporation in bulk Si and Ge is studied using first-principles calculations within density functional theory. In Si, it is found that the site preference of a single Mn atom is reversed from interstitial to substitutional in the presence of a neighboring n-typ…
Much attention has been focused on exploiting novel strategies for the creation of hierarchical polymer assemblies by the control of the assembling number or the relative location among neighboring polymers. We here propose a novel strategy toward the creation of "hierarchical" single-walled carbon nanotube (SWNT) arc…
Quasi-static thermo-electro-mechanical performance of annular and solid cylindrical piezoelectric actuators was studied by experimental means under electric fields varying from 0.3 to 1.8 kV mm −1 with a preload of 4.6 MPa over the temperature range of −30 to 125 °C. It was found that, for both annular and solid actua…
Two-dimensional colloidal lithography is successfully applied to the fabrication of novel transparent carbon nanotube networks with controllable film resistance. The method adopted in this study produces ordered network structure with regular voids in the carbon nanotube network film, and results in transparency incre…
The electronic structure of the (Pb,Sn)Te alloy displays the so-called ``band inversion'' between its two end members, PbTe and SnTe. Although the electronic structures of these two end members have been extensively studied by first-principles calculations, there have been no reports of first-principles calculations o…
Tunable arrays of C60 linear chains on the α-sexithiophene (6T) bilayer or monolayer surface nanotemplates are formed by careful control of the delicate balance between the intermolecular and the interfacial interactions using different experimental conditions, that is, various C60 and 6T surface coverages and post-an…
Parallel, linear gold nanoparticle arrays with a periodic lateral spacing have been created via templated assembly. The template is a de novo designed peptide that self-assembles into β-sheet fibrils exhibiting a laminated morphology. Regular arrangement of positively charged lysine residues across the width of the fi…
ZrO 2 ceramic coatings were prepared in situ on an AZ91D Mg alloy by plasma electrolytic oxidation in a K 2 ZrF 6 solution. The phase composition and the surface morphology of the coatings were examined with X‐ray diffraction and scanning electron microscopy. The thermal shock resistance of the coatings was evaluated…