Materials Literature
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The model system Pd/TiO2 (110) was used to evaluate the correlation between metal encapsulation and electronic structure of TiO2 crystals. We observed encapsulation of Pd clusters supported on TiO2 crystals, which were heavily Ar+ sputtered, Nb-doped, or reduced by vacuum annealing. In contrast, encapsulation was not…
Au-Ag alloy nanoparticles supported on mesoporous aluminosilicate have been prepared by one-pot synthesis using hexadecyltrimethylammonium bromide (CTAB) both as a stabilizing agent for nanoparticles and as a template for the formation of mesoporous structure. The formation of Au-Ag alloy nanoparticles was confirmed b…
We present novel gold nanophotonic crescent moon structures with a sub-10 nm sharp edge, which can enhance local electromagnetic field at the edge area. The formation of unconventional nanophotonic crescent moon structure is accomplished by using a sacrificial nanosphere template and conventional thin film deposition…
Nowadays the open and the patent literatures propose a large number of polymers whose main chains can be degraded usefully. Among these degradable polymers, aliphatic polyester-based polymeric structures are receiving special attention because they are all more or less sensitive to hydrolytic degradation, a feature of…
Pure and Nd-modified Bi 4 Ti 3 O 12 ceramics are prepared using the conventional solid state reaction method and their dielectric properties and mechanical properties are investigated. This shows that the activation energy of oxygen vacancies is enhanced whereas the concentration of oxygen vacancies is reduced when Bi…
Abstract Pre‐irradiation annealing at temperatures ≥800 °C in air drastically reduces the 230 °C dosimetric thermostimulated luminescence (TSL) peak in CaSO 4 :Dy/Tm and simultaneously the 60 °C and 120 °C peaks are strongly enhanced. In samples sintered at 1000 °C, the dosimetric peak vanished totally while the low t…
We have developed and characterized novel multilayered metal film-based surface-enhanced Raman scattering (SERS) substrates capable of enhancing SERS signals over an order of magnitude compared to conventional single layer substrates. In addition to enhanced signal intensity, these multilayered metal film substrates a…
A magnetized c -axis oriented single-domain Sm123 bulk superconductor of 60 mm in diameter was employed in place of a conventional Nd–Fe–B permanent magnet in a planar-type magnetron sputtering apparatus and its sputtering performance was studied by measuring the Ar gas pressure dependence of deposition rate for eleme…
Hydrothermal templating of mesoporous molecular sieves by nonionic triblock copolymers [poly(oxyethylene)-poly(oxypropylene)-poly(oxyethylene) (PEO-PPO-PEO)] at specific block lengths of EO(20)PO(70)EO(20) and selected 2 M HCl dosage (pH -0.3) caused the formation of micrometer-sized SBA-15 hexagons with well-ordered…
Intercalated Ni x TiSe 2 compounds with Ni concentration up to x = 0.5 have been investigated using x-ray diffraction, magnetic susceptibility and specific heat measurements. A set of peculiarities caused by the intercalation, such as a significant decrease of the gap between Se–Ti–Se trilayers and depletion of the lo…
The efficient use of ferroelectric thin films in radio-frequency agile devices faces several limitations. One of them is imposed by the dielectric losses which are usually above 1%, i.e. above the threshold as set by the electronic industry. Following the same route as for bulk ceramics, we have processed composite st…
Abstract Cathodoluminescent (CL) powders of zinc aluminate activated with samarium ions have been prepared by a co‐precipitation chemical process. Different doping concentrations in the start mixture and sintering temperatures for the precipitated powder were studied. It was observed that the crystalline characteristi…
Molecular dynamics simulations are performed at 6543 and 3310 K to investigate how the viscosity and self-diffusion coefficient scale with system size in the liquid BKS silica system. We find that at high temperature the finite-size effect on shear viscosity is negligible. However, the size effect on the diffusion coe…
Abstract Summary: Cyclodi(ethylene succinate) (C2) easily reacts with poly(ethylene terephthalate) (PET) in the melt leading to the formation of high molar mass PET‐Poly(ethylene succinate) copolymers (PET‐PES). Copolyesters with a PET/C2 starting mass ratio of 90/10, 80/20, 70/30 and 50/50 were synthesized and charac…
A series of Sr 2 - x (Ca 0.55 Ba 0.45 ) x FeMoO 6 (0 ≤ x ≤ 0.8) double perovskite oxides has been prepared to assess the effects of cation size variance, σ 2, at constant mean A site cation radius. All of the samples are ferromagnetic with Curie temperatures T C = 390−435 K and show metal-to-insulator transitions at T…
Using a first-principles method, we study field emission properties of double-wall carbon nanotubes with various end geometries and combinations of inner and outer walls. The open double-wall nanotubes exhibit substantial contribution to the emission current from the extended π states. These states are insensitive to…
In this work we investigate the variation of the local structure around ${\mathrm{Cu}}^{2+}$ as well as the crystal structure in ${\mathrm{Rb}}_{2}{\mathrm{CuCl}}_{4}{({\mathrm{H}}_{2}\mathrm{O})}_{2}$ through x-ray absorption spectroscopy (XAS) and x-ray diffraction (XRD) as a function of pressure. We show that the a…
We have investigated the structure and morphology of the tenfold surface of decagonal ${\mathrm{Al}}_{71.8}{\mathrm{Ni}}_{14.8}{\mathrm{Co}}_{13.4}$ by highly surface sensitive He atom scattering (HAS), high resolution low energy electron diffraction(SPA-LEED), and low temperature scanning tunneling microscopy (STM).…
The chemical preparation of structurally well-defined biodegradable amphiphilic block copolymers is now of great interest for biomedical applications and the fundamental mimetic study of biomacromolecule self-assembly. For this purpose, in this study, (R,R)-N,N'-bis(3-tert-butylsalicylidene)-1,2-cyclohexanediamine 2 a…
Abstract Random and block copolymerizations of L ‐ or D ‐lactide with ε‐caprolactone (CL) were performed with a novel anionic initiator, (C 5 Me 5 ) 2 SmMe(THF), and they resulted in partial epimerization, generating D , L ‐ or meso ‐lactide polymers with enhanced biodegradability. A blend of PLLA‐ r ‐PCL [82/18; PLLA…