Materials Literature
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The π-conjugated micro/macroporous polyacetylene-type polyHIPE foams were synthesized for the first time by a chain-growth insertion polymerization of high internal phase emulsions (HIPEs). In the first step, the π-conjugated polyHIPE foams were prepared by polymerization of 1,3-diethynylbenzene HIPEs using [Rh(nbd)ac…
The phenomenon of constrained sintering, where large rigid inclusions of alumina have been shown to significantly reduce the rate of sintering of titania [Bordia and Raj (1988) J. Am. Ceram. Soc . 71, 302–310], is shown to subside nearly completely during flash sintering carried out under modest electrical fields. The…
The optical transparency and high electron mobility of graphene make it an attractive material for photovoltaics. We present a field-effect solar cell using graphene to form a tunable junction barrier with an Earth-abundant and low cost zinc phosphide (Zn3P2) thin-film light absorber. Adding a semitransparent top elec…
Recent developments in the fabrication of hollow spheres have allowed our group to prepare a new type of macroporous ceramics: hollow sphere ceramics ( HSC s). Alumina hollow spheres were first produced by centrifugal spray‐drying of particle‐stabilized foam slurry. The obtained hollow spheres were sintered together t…
The radial growth and advancement of the adhesive interface to the substratum of many species of acorn barnacles occurs underwater and beneath an opaque, calcified shell. Here, the time-dependent growth processes involving various autofluorescent materials within the interface of live barnacles are imaged for the firs…
A single crystal of L-prolinium tartrate (LPT), which is an organic non linear optical material, was successfully synthesized and grown using a slow evaporation solution growth technique (SEST). The crystal structure and lattice parameters of the crystal were confirmed by powder X-ray diffraction and it was found that…
Three composition groups in the BaTiO 3 – CaTiO 3 – BaHfO 3 ternary system, (1 − x ) Ba ( Hf y Ti 1− y ) O 3 – x ( Ba 1− z Ca z ) TiO 3 (abbreviated as BH y T – x BC z T with x = 0–1.0, y = 0.16, z = 0.20; x = 0–1.0, y = 0.16, z = 0.30; x = 0–1.0, y = 0.20, z = 0.30, respectively), have been designed for investigating…
We construct a structural order parameter from the energy equipartition of normal modes of vibration to quantify the structural heterogeneity in disordered solids. The order parameter exhibits strong spatial correlations with low-temperature dynamics and local structural entropy. To characterize the role of particles…
Perovskite‐spinel epitaxial nanocomposite thin films are commonly grown on single crystal perovskite substrates, but integration onto a Si substrate can greatly increase their usefulness in devices. Epitaxial BiFeO 3 –CoFe 2 O 4 nanocomposites consisting of CoFe 2 O 4 pillars in a BiFeO 3 matrix are grown on (001) Si…
Herein, we report a cost-effective and easy synthetic procedure for the fabrication of a graphene–single-walled carbon nanotube–poly(3-methylthiophene) ternary nanocomposite for high-performance supercapacitor electrodes. The possible interactions of both graphene (Gr) and single-walled carbon nanotubes (SWCNTs) with…
Heterojunction composites based on n-type TiO2 nanotubes arrays (TNAs) coupled with p-type Cu2O nanoparticles were synthesized using a square wave voltammetry deposition method for in situ deposition of Cu2O nanoparticles onto the inner surfaces and interfaces of TNAs. The prepared samples were characterized by field-…
A rationally designed two-step synthesis of silica vesicles is developed with the formation of vesicular structure in the first step and fine control over the entrance size by tuning the temperature in the second step. The silica vesicles have a uniform size of ≈50 nm with excellent cellular uptake performance. When t…
CaF 2 nanoparticles doped with 1 at. % Eu 3+ and codoped with Mn 2+ ions (1, 2, and 3 at. %) were synthesized at 180 °C by using ethylene glycol as a capping agent and solvent medium. The emission spectra of these nanomaterials show two main peaks at 590 and 612 nm after excitation at 240 or 394 nm. Enhancement in lum…
ABSTRACT There is currently a considerable interest in developing bio‐based and green nanocomposites in industrial and technological areas owing to their biodegradability, biocompatibility, and environmental friendliness. In this study, a bio‐based nanosized material, cellulose nanocrystals (CNC), extracted from south…
Using polarized neutron reflectometry, we observe an induced magnetization of $75\ifmmode\pm\else\textpm\fi{}25\text{ }\mathrm{kA}/\mathrm{m}$ at 10 K in a ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$ $(\mathrm{LSMO})/{\mathrm{BiFeO}}_{3}$ superlattice extending from the interface through several atomic…
We report an enzyme immobilization method effective at elevated temperatures (up to 105 °C) and sufficiently robust for hyperthermophilic enzymes. Using a model hyperthermophilic enzyme, α-galactosidase from Thermotoga maritima, immobilization within chemically cross-linked poly(vinyl alcohol) (PVA) nanofibers to prov…
Lead‐free compounds based on perovskite solid solutions in the ternary system ( Bi 0.5 Na 0.5 ) TiO 3 ‐ MeNbO 3 ‐ SrTiO 3 ( BNT ‐ MeNbO 3 ‐ ST , Me=K, Na,( K 0.5 Na 0.5 )) were fabricated using a conventional solid‐state reaction method. The effect of ST addition to BNT ‐ MeNbO 3 ceramics on the strain behavior, diele…
The structural, optical, and room-temperature electrical properties of strained La-doped SrTiO3 epitaxial thin films are investigated. Conductive La-doped SrTiO3 thin films with concentration varying from 5 to 25% are grown by molecular beam epitaxy on four different substrates: LaAlO3, (LaAlO3)0.3(Sr2AlTaO6)0.7, SrTi…
Electromechanical properties and high power characteristics of Pb ‐free hard piezoelectric ceramics in the ( BiN a 0.88 K 0.08 Li 0.04 ) 0.5 ( Ti 1− x Mn x ) O 3 ( x = 0, 0.014, 0.015, and 0.016) system were studied. Mn doping resulted in a considerable enhancement of mechanical quality factor Q m and vibration veloci…
The present study describes the successful synthesis of a Ca 2+ ‐doped LaCrO 3 ceramic with high infrared ( IR ) emissivity, which is important for high‐temperature applications for significant energy saving. It is demonstrated that 20 mol% Ca 2+ ‐doped LaCrO 3 , i.e., La 0.8 Ca 0.2 CrO 3 , exhibited an IR emissivity…