Materials Literature
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We achieved direct visualization of the piezoelectric potentials in a single bent ZnO microwire (MW) using focused synchrotron radiation (soft x-ray) scanning photoelectron spectro-microscopy. Using radial-line scan across the bent section of ZnO MW, the characteristic core-level shifts were directly related to the sp…
In the present work, acoustic emission testing (AE) technique was successfully applied to identify damage phenomena occurred during stress corrosion cracking (SCC) in chloride-containing environment of a precipitation hardening martensitic stainless steel. Through the use of multi-variable statistical analysis [by cou…
In this work, polyarylacetylene (PAA) prepolymer obtained from 1,4-diethynylbenzene was evaluated as polymeric precursor of monolithic vitreous carbon (MVC). The monomer 1,4-diethynylbenzene was synthesized and the PAA prepolymer was prepared with 13, 16 and 19 wt % of nickel catalyst. The best percentage of nickel ca…
Koelreuteria formosana ethanolic extract (KFEE) is obtained from natural plants that are endemic to Taiwan. In a previous study, it was demonstrated that KFEE inhibited low-density lipoprotein (LDL) and prevented oxidized LDL‑induced apoptosis in endothelial cells. In the present study, KFEE was shown to inhibit the i…
Temperature dependent photoluminescence (PL) of MgZnO epitaxial layers with high Mg content were studied to understand the effect of carrier localization on the PL dynamics, including the PL dependence on excitation power density and temperature. A double blueshift of the PL peak position with increase of measurement…
Photonic resonance in lossy films with 1D periodicity is generally associated with narrow spectral, angular, and polarization‐selective absorption. Contrarily, in this paper a 1D amorphous Si grating structure is demonstrated that efficiently absorbs fully hemispherical unpolarized light in the entire visible spectral…
We study the dependence of the thermal resistance of TiN/Ge2Sb2Te5 stacks on Si in the presence or not of a thin Ti interfacial layer. While for TiN/Ge2Sb2Te5 almost ideal thermal properties of the interfaces are found, a different behaviour is measured for TiN/Ti/Ge2Sb2Te5. After exposure to temperatures up to 440 °C…
We report on the epitaxial growth of Ge virtual substrates directly on Si (001) and on different porosity porous silicon (pSi) buffers. Obtained results indicate that Ge grown on low porosity (22%) pSi buffer has a better crystalline quality compared to Ge grown on bulk Si and on higher porosity buffers. This result i…
Transition metal selenide and telluride have recently receive considerable attention due to their possible structural relation to ferropnictide. Pressure is often used as an efficient way to modify the crystal or electronic structure that in many cases lead to new material states of interest. Here we search the struct…
Metals are commonly oxidized under ambient conditions. Although bulk oxidation has received considerable attention, far less is known about oxidation at the subnanometer scale. This is unfortunate, as metal particles used in heterogeneous catalysis typically range from subnanometer to some nanometers. Here, density fu…
We present an electromagnetic bandgap (EBG) multilayer structure, acting as a frequency-selective surface able to absorb in specified narrow frequency bands within the GHz-range. The structure is a lossy EBG using ultra-thin conductive layers to generate a controlled resonance in homogenous high permittivity slabs. Th…
We use transport and magnetization measurements to study the effect of Cr-doping to the phase diagram of the electron-doped superconducting BaFe2-xNixAs2 iron pnictides. In principle, adding Cr to electron-doped BaFe2-xNixAs2 should be equivalent to the effect of hole-doping. However, we find that Cr doping suppresses…
In this paper, we report a simple solution-combusting route for the one-step synthesis of octahedral ZnFe2O4 nanocrystals. Zn(CH3COO)2 and FeCl3 were employed as the starting Zn and Fe sources, oxygen in the atmosphere as the oxygen source, and a mixture of ethanol and ethylene glycol with a volume ratio of 60/40 as t…
Exploratory work has been undertaken to compare the performance of nanocrystalline cellulose (NCC) with fumed silica in styrene/acrylic latex coatings. NCC has emerged as a promising candidate for the reinforcement of polymeric materials because of its impressive mechanical properties and renewable nature. However, a…
Co-delivery of the anticancer drug, mitoxantrone (MTO) and the gene encoding tumor suppressor protein p53 was evaluated towards anticancer combinatorial therapy. The nanoplatforms developed herein are assembled by coupling β-cyclodextrin and the cationic polymer, polyethyleneimine to a hydrophilic polymer, pullulan (P…
Directional control of droplet motion at room temperature is of interest for applications such as microfluidic devices, self‐cleaning coatings, and directional adhesives. Here, arrays of tilted pillars ranging in height from the nanoscale to the microscale are used as structural ratchets to directionally transport wat…
The surface termination of single crystalline diamond with fluorine and chlorine was investigated. The diamond was exposed to SF 6 inductively coupled plasma for fluorination and to Cl 2 plasma for chlorination. For the fluorine termination, the plasma treatment caused one monolayer of fluorine (measured with two angl…
The charge-ordered state in a quasi-two-dimensional organic superconductor ${\ensuremath{\beta}}^{\ensuremath{'}\ensuremath{'}}\text{\ensuremath{-}}(\text{BEDT-TTF}){}_{4}[({\mathrm{H}}_{3}\mathrm{O})\text{Ga}({\mathrm{C}}_{2}{\mathrm{O}}_{4}){}_{3}]\ifmmode\cdot\else\textperiodcentered\fi{}{\mathrm{C}}_{6}{\mathrm{H}…
The effect of the calcination conditions on the catalytic activity for N2O decomposition of 2.5% RhOx/CeO2 catalysts has been investigated. Ramp and flash calcinations have been studied (starting calcinations at 25 or 250/350 °C, respectively) both for cerium nitrate and ceria-impregnated rhodium nitrate decomposition…
Abstract This paper reports a study on sintering and characterization of graphene platelet (GPL)‐reinforced ceramic composites. Alumina (Al 2 O 3 ) and zirconia (ZrO 2 ) toughened Al 2 O 3 (ZTA) composites reinforced with GPLs are fabricated, respectively, using spark plasma sintering. The microstructures and mechanic…