Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNanoporous Polystyrene Containing Hydrophilic Pores from an ABC Triblock Copolymer PrecursorJavid Rzayev and Marc A. HillmyerView Author Information Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455-0431…
Many of water's peculiar physical properties are still not well understood, and one of the most important unresolved questions is its glass transition related dynamics. The consensus has been to accept a glass transition temperature (T(g)) around 136 K, but this value has been questioned and reassigned to about 165 K.…
We use time-domain electrostatic force spectroscopy (TD-EFS) for characterising the dynamics of mobile ions in a partially crystallised LiAlSiO$_4$ glass ceramic, and we compare the results of the TD-EFS measurements to macroscopic electrical conductivity measurements. While the macroscopic conductivity spectra are de…
We propose a spintronic magnetic field sensor, fashioned out of quantum wires, which may be capable of detecting very weak magnetic fields with a sensitivity of ~ 1 femto-Tesla per root Hertz at a temperature of 4.2 K and ~ 80 femto-Tesla per root Hertz at room temperature. Such sensors have applications in magnetomet…
Electromagnetic properties of periodic two-dimensional subwavelength structures consisting of closely packed inclusions of materials with negative dielectric permittivity epsilon in a dielectric host with positive epsilon(h) can be engineered using the concept of multiple electrostatic resonances. Fully electromagneti…
Bulk samples of the pyrite chalcogenide solid solutions ${\mathrm{Co}}_{1\ensuremath{-}x}{\mathrm{Fe}}_{x}{\mathrm{S}}_{2}$ $(0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.5)$, have been prepared and their crystal structures and magnetic properties studied by x-ray diffraction and SQUID magnetization measurements. A…
To obtain a coding system for multiplex detection, we have developed a method to synthesize a new type of nanomaterial called composite organic-inorganic nanoparticles (COINs). The method allows the incorporation of a broad range of organic compounds into COINs to produce surface enhanced Raman scattering (SERS)-like…
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…