Materials Literature
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In a tiled-grating system, it is difficult to make two tiled gratings strictly coplanar. We propose and demonstrate for the first time, as far as we know, a simple method by which the longitudinal piston error between two tiled gratings can be reduced below lambda/10, close to the influence of the environmental factor…
The study of the mechanisms of formation and growth of ZnO nanostructures is crucial as they have the potential to find applications in opto‐electronic devices. ZnO nanostructures of different morphologies have been synthesized using a low‐temperature polymeric precursor process. Controlling the Zn cation and nitric a…
Aqueous suspensions of aggregated silica particles have been dewatered to the point where the colloidal aggregates connect to each other and build a macroscopic network. These wet cakes have been compressed through the application of osmotic pressure. Some cakes offer a strong resistance to osmotic pressure and remain…
A novel hexagonal two‐dimensional ZnO nanosheet thin film was successfully synthesized on an aluminum substrate by a simple wet‐chemical approach, which exhibited very strong orange emission. It was concluded that ZnO nanosheets were induced to grow along 〈−1 1 0 0〉directions by the boehmite layer formed on the surfac…
The nanostructured transition aluminas were synthesized from an aluminum alkoxide precursor in the presence of various surfactants under hydrothermal conditions without any organic additives. The synthesized nanostructured alumina materials showed different morphologies depending on surfactants with high surface area,…
Fabricating various nanostructures based on the self-assembly of diverse biological molecules is now of great interest to the field of bionanotechnology. In this study, we report a de novo designed peptide (T1) with a preferential beta-hairpin forming property that can spontaneously assemble into nanofibrils in ultrap…
We consider superconductivity in boron (B) doped diamond using a simplified model for the valence band of diamond. We treat the effects of substitutional disorder of B ions by the coherent potential approximation (CPA) and those of the attractive force between holes by the ladder approximation under the assumption of…
This paper presents results of measurements and predictions of radiolytic hydrogen production rates from two actual process slurries in the Defense Waste Processing Facility (DWPF) at Savannah River Site (SRS). Hydrogen is a flammable gas and its production in nuclear facilities can be a safety hazard if not mitigated…
The effect of Mo doping on the structural, magnetic, electrical, and thermal transport properties of ${\mathrm{Ca}}_{4}{\mathrm{Mn}}_{3\ensuremath{-}x}{\mathrm{Mo}}_{x}{\mathrm{O}}_{10}$ $(0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.3)$ compounds has been investigated. Our study indicates that ${\mathrm{Ca}}_{4}{\…
We establish the contributions made by the vanadium anapole, and other magnetoelectric multipoles, to the electron ground state of ${\mathrm{V}}_{2}{\mathrm{O}}_{3}$ in its antiferromagnetic modification. To this end, observations made by resonant x-ray Bragg diffraction are analyzed in terms of a scattering amplitude…
The renormalized phonon spectrum beyond the random phase approximation in ferroelectric thin films is obtained using a Green's function technique and the transverse Ising model including anharmonic spin-phonon and phonon-phonon interactions. The temperature and film thickness dependence of the soft phonon mode energy…
Abstract We present synthesis, structure and magnetic properties of structurally well-ordered single-crystalline β-MnO 2 nanorods of 50–100 nm diameter and several µm length. Thorough structural characterization shows that the basic β-MnO 2 material is covered by a thin surface layer (∼2.5 nm) of α-Mn 2 O 3 phase with…
We have developed a novel and simple method for chemical reaction synthesis of Eu(OH)3 nanorods with a diameter of 20–30 nm and a length of about 300 nm at 90 °C using cyclohexylamine as the alkaline source instead of NaOH with subsequent thermal conversion to Eu2O3 nanorods at 700 °C. The effect of different alkaline…
There has been little study on the effect of composition or molecular weight on the biodegradation rate of photo-cross-linked biodegradable aliphatic polyesters though such information is important for tissue engineering scaffolds. We have synthesized a new series of photopolymerizable linear poly(epsilon-caprolactone…
tert-Butyl hydroperoxide catalyzed by (5,10,15,20-tetramesitylporphyrinate) osmium(II) carbonyl [Os(TMP)CO] complex was found to be a highly efficient versatile oxidant for C-H carbons in steroid substrates. When reacted with representative steroids with an estrane, pregnane, 5beta-cholane, or 5alpha-cholestane struct…
The shrinkage behavior of fine zirconia powders containing 2.9 and 7.8 mol% Y 2 O 3 was investigated to clarify the effect of Y 2 O 3 concentration on the initial sintering stage. The shrinkage of powder compact was measured under both conditions of constant rates of heating (CRH) and constant temperatures. CRH measur…
A new kind of metamaterial, an array of periodic gold rod pairs standing on gold substrate, is introduced in this paper. A commercial electromagnetic mode solver, the High-Frequency Structure Simulator, is employed to explore the propagation property of electromagnetic waves in this system. When an S -polarized electr…
Germanium (Ge) nanocrystals have been synthesized by annealing co-sputtered SiO 2 –Ge samples in N 2 or forming gas (90 % N 2 +10 % H 2 ) at temperatures ranging from 700 to 1000 °C. We concluded that the annealing ambient, temperature and Ge concentration have a significant influence on the formation and evolution of…
We have synthesized three phenylquaterthiophene derivatives (liquid-crystalline semiconductors that exhibit a chiral nematic phase) and investigated their carrier transport characteristics in the chiral nematic phases with the time-of-flight technique. In contrast to the ionic nature of negative carrier transport, pos…
The phase diagram of the $\mathrm{Al}\text{\ensuremath{-}}\mathrm{Co}$ binary alloy system is intensively studied because of its importance for understanding decagonal quasicrystals, but remains imprecisely known due to the occurrence of many competing complex structures with composition close to ${\mathrm{Al}}_{13}{\…