Materials Literature
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A novel aliphatic polycarbonate from renewable resource was prepared by copolymerization of furfuryl glycidyl ether and CO 2 using rare earth ternary catalyst; its number-average molecular weight ( M n ) reached 13.3 × 10 4 g/mol. The furfuryl glycidyl ether and CO 2 copolymer (PFGEC) was easy to become yellowish at a…
We present a design of dielectric metamaterials exhibiting a broad range of negative effective permeability in the terahertz spectral region. The investigated structures consist of an array of high-permittivity rods that exhibit a series of Mie resonances giving rise to the effective magnetic response. The spectral po…
0.3Pb(Ni 1/3 Nb 2/3 )O 3 − x PbTiO 3 –(0.7− x )PbZrO 3 ( x =0.33–0.43) piezoelectric ceramics were prepared by the one‐step solid‐state reaction method. X‐ray diffraction analysis showed the coexistence of rhombohedral and tetragonal phases at the composition x =0.39, which is the morphotropic phase boundary (MPB) for…
Superconductivity in iron pnictides has been recently proposed to be due to spin-fluctuation mediated coupling between hole and electron bands with order parameters of opposite sign. BCS multiband models give qualitative predictions but cannot simultaneously reproduce the experimental values of critical temperature an…
In this work, we report on white light generation by chemical modification of red phosphor LaPO4:Eu3+ nanorods. The method includes an initial hydrothermal crystallization of single hexagonal phase LaPO4:Eu3+ nanorods with surface hydration layers, followed by the deprotonation of oleic acid when reacted with surface…
This paper reports an efficient fabrication of nanostructures on silicon substrates for surface-enhanced Raman scattering (SERS). Silicon wafer substrates in the aqueous solution of silver nitrate were machined by the femtosecond laser direct writing to achieve simultaneously in one-step the generation of grating-like…
Y 3 Al 5 O 12:Eu 3+ powders were synthesized by using a high-energy ball mill (HEB) and conventional solid-state reaction method (SSR). The effects of the synthesis procedure on the crystallinity, morphology, structure, and luminescence spectra were examined by X-ray diffraction, field emission-scanning electron micro…
This study examined the effect of polyvinyl alcohol (PVA) on the microstructure and permeability of freeze‐cast porous alumina. The PVA addition was shown to have a significant effect on the pore size, with the trends in microstructure morphology and scale being qualitatively consistent with the effects of PVA additio…
Strong intergraphene shear resistance is engineered in multi-walled carbon nanotubes (MWCNTs) by embedding the nanotubes into a compressive-stressing ceramic environment to exploit the exceptional strength of its inner graphene walls during tensile loading. A dramatic enhancement in the tensile failure load of MWCNT i…
Nanodiamond (ND) seeding is a well-established route toward the CVD (chemical vapor deposition) synthesis of diamond ultrathin films. This method is based on the deposition onto a substrate of diamond nanoparticles which act as pre-existing sp(3) seeds. Here, we report on a straightforward method to disperse diamond n…
We developed three-dimensional electrospun silk fibroin (ESF) scaffolds with controllable pore size. The purpose of this study was to evaluate ESF scaffolds with pores (P-ESF) for bone regeneration via in vitro and in vivo studies, with a comparison to a commercially available porous three-dimensional polylactic acid…
After size-selection and osmotic pressure measurements at fixed ionic strength, the behavior of aqueous colloidal suspensions of anisotropic disklike beidellite clay particles has been investigated by combining optical observations under polarized light, rheological, and small angle X-ray scattering (SAXS) experiments…
The reaction of the Zintl compound K(4)Ge(9) with Te and Ga(2)Te(3) in ethylenediamine (en) at 190 degrees C gave the germanium polytelluride {[Ga(en)(3)](2)[(GeTe)(2)(Te(5))(6-)(Te(8))(4-)]}(n) (1). The single-crystal structure analysis revealed that 1 has two different polytelluride fragments: cross-shaped 36-e(-) T…
MnO2–mesoporous carbon hybrid nanocomposites were synthesized to achieve high values of redox pseudocapacitance at scan rates of 100 mV s−1. High-resolution transmission electron microscopy (HRTEM) along with energy dispersive X-ray spectroscopy (EDX) demonstrated that ∼1 nm thick MnO2 nanodomains, resembling a confor…
We report ab initio calculations of the electronic band structure and the phonon dispersion relations of the zincblende-type mercury chalcogenides ($\ensuremath{\beta}\text{-HgS}$, HgSe, and HgTe). The latter have been used to evaluate the temperature dependence of the specific heat, which has been compared with exper…
We examine theoretically the signatures of magnetic adatoms in graphene probed by scanning tunneling spectroscopy (STS). When the adatom hybridizes equally with the two graphene sublattices, the broadening of the local adatom level is anomalous and can scale with the cube of the energy. In contrast to ordinary metal s…
A new bottom-up strategy is used to construct water-soluble organic/inorganic fluorescent unimolecular nanoparticles based on polyhedral oligomeric silsesquioxane (POSS) and conjugated oligoelectrolyte. Their high quantum yield, good cytocompatibility, and unique whole-cell permeability could serve as a light-harvesti…
Cobalt metal particles have several stable phases depending on their size and the temperature employed in the preparation. The face-centred cubic (fcc) structure is thermodynamically stable above 450 °C, whereas the hexagonal-closed packed (hcp) phase is stable at lower temperatures. Cobalt oxide reduction carried out…
Alpha alumina (α‐Al 2 O 3 ) powders and α‐Al 2 O 3 /boehmite (γ‐AlOOH) mixtures with controlled γ‐AlOOH contents were synthesized hydrothermally under alkaline or acidic conditions at 380°–435°C for 1–10 days, under 6.9–14.5 MPa pressure, from concentrated precursors without stirring. The precursors were formed by mix…
We study by molecular dynamics computer simulation a binary soft-sphere mixture that shows a pronounced difference in the species' long-time dynamics. Anomalous, power-law-like diffusion of small particles arises that can be understood as a precursor of a double-transition scenario, combining a glass transition and a…