Materials Literature
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The paramagnetic six-coordinated iron(II) 3,8,13,18-tetraaryldithiaethyneporphyrin (ES(2)P)(2)Fe(II) complexes of the double-decker type have been synthesized using iron pentacarbonyl as the metal source. The complex contains two porphyrinic macrocycles coordinated to the iron(II) in the sandwich-like fashion as deter…
Abstract The present study is aimed to investigate the effect of multiple extrusions of iPP/WF composites with and without EBAGMA used as compatibilizer. The degradation induced by the recycling processes was evaluated through changes in molecular structure, morphology, rheology, thermal and mechanical properties. The…
We employ a template-directed self-assembly process to arrange nanospheres as small as 20 nm in a polymer resist template with regular hole arrays with periods down to 42 nm produced using extreme ultraviolet interference lithography. To demonstrate magnetic probe recording employing magnetic tips, an array of magneti…
In recent years, conjugated polyelectrolytes (CPEs) have attracted increasing attention for their applications in highly sensitive biosensors by taking advantage of their unique optical amplification properties. In comparison to previous applications tailored for highly sensitive biomacromolecule detection, this Focus…
Using a generalized Landau theory involving orientational, layering, tilt, and biaxial order parameters we analyze the smectic-${A}^{\ensuremath{\ast}}$ and smectic-${C}^{\ensuremath{\ast}}$ (Sm-${A}^{\ensuremath{\ast}}$--Sm-${C}^{\ensuremath{\ast}}$) transitions, showing that a combination of small orientational orde…
Mesoporous silica nanofibers were synthesized within the pores of the anodic aluminum oxide template using a simple sol-gel method. Transmission electron microscopy investigation indicated that the concentration of the structure-directing agent (EO20PO70EO20) had a significant impact on the mesostructure of mesoporous…
We report the structure and optical properties of semiconductor Li-doped ZnO nanorods. The sample was synthesized by an ethylenediamine-assisted low-temperature hydrothermal technique. The obtained morphology was studied by using high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction techniques…
The Fe doped a-C films on n-type silicon substrates were deposited by pulse laser deposition. The Fe doped a-C films are p-type semiconductor and they are rich in sp2 (∼75%). I-V characteristics and photoconductivity of the structures were measured in the current in-plane geometry. The photoconductivity with magnitude…
We have used laboratory and synchrotron x-ray diffraction to investigate the structural and chemical changes undergone by polycrystalline RbH(2)PO(4) upon heating within the 30-250 °C temperature interval. Our data show no evidence of the previously reported onset of partial polymerization at T = 96 °C (Park et al 200…
An isotropic three-dimensional negative refractive index metamaterial has been fabricated and characterized in the visible regime. The metamaterial is based on a structure consisting of polycrystalline magnesium diboride (MgB2) as the host, providing negative permittivity, and silicon carbide (SiC) nanoparticles embed…
We demonstrate the accuracy of the finite-element method to calculate the diffraction efficiencies of an arbitrarily shaped crossed grating in a multilayered stack illuminated by an arbitrarily polarized plane wave under oblique incidence. The method has been validated by using classical cases found in the literature.…
Elastic scattering of low-energy (0--13 eV) electrons from more realistic models of a DNA base-pair decamer is studied using multiple-scattering theory and $T$ matrices obtained from ab initio $R$-matrix calculations. The models include two types of irregularities usually found in cellular DNA: base-pair mismatch and…
A homogeneous distribution of ferroelectric nanoinclusions was observed by optical second harmonic generation in epitaxial films of hexagonal $R{\text{MnO}}_{3}$ $(R=\text{Y},\text{Dy},\text{Ho},\text{Er})$ grown on ${\text{ZrO}}_{2}({\text{Y}}_{2}{\text{O}}_{3})$ substrates. The inclusions correspond to secondary ori…
The 5d transition metal Ir is successfully doped for Fe in SmFeAsO to induce superconductivity with T(c) = 16 K at a doping level of approximately 15 atom %. Ir doping decreases the As-Fe-As bond angle, beta; this behavior is different from the change in beta for the system with doping charges in the charge-reservoir…
The recent demonstration that the carbene cluster [Fe(4)S(4)(Pr(i)(2)NHCMe(2))(4)] (9) is an accurate structural and electronic analogue of the fully reduced cluster of the iron protein of Azotobacter vinelandii nitrogenase, including a common S = 4 ground state, raises the issue of the existence and magnetism of othe…
Dendrimers containing 3 n +2 long tethers ( n = generation number from 0 to 7: G 0 −G 7 ) terminated by alkylferrocenyl termini were used for the redox recognition of the oxo-anions H 2 PO 4 − and ATP 2− by cyclic voltammetry (CV) in order to investigate the ion-pairing and dendritic effect in the absence of a functio…
The fabrication of transparent Nd 3+ ion‐doped Lu 2 O 3 ceramics is investigated by pressureless sintering under a flowing H 2 atmosphere. The starting Nd‐doped Lu 2 O 3 nanocrystalline powder is synthesized by a modified coprecipitant processing using a NH 4 OH+NH 4 HCO 3 mixed solution as the precipitant. The therma…
In laminates, the converse magnetoelectric (CME) effect is often achieved by an elastic coupling between magnetostrictive and piezoelectric layers. Here the authors report on an alternative mechanism for obtaining CME. In a transition-metals-based ferromagnetic shape memory alloy/piezoelectric ceramic laminated compos…
We report here broadband membrane reflectors based on Fano resonances in patterned silicon nanomembranes. Resonance control of the reflectors was realized either by partially removing buried oxide layer underneath the device layer or by controlled SiO2 film deposition on top of the devices. Both blueshifts and redshif…
We report on AlGaN grating reflectors for short-wavelength applications, an alternative to conventional distributed Bragg reflectors that are difficult to make in a GaN-based system. An array of air-bridge AlGaN grating reflectors, with a period and filling factor of 430 nm and 0.55, was fabricated through holographic…