Materials Literature
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Lead-free piezoelectric Na0.5K0.5NbO3 (NKN) thin films were prepared via sol-gel processing on both Pt (111)/Ti/SiO2/Si(100) and Si(100) substrates. XRD analysis showed that perovskite structure was achieved after annealing at 800∼900°C. The SEM morphology showed the NKN films with a total thickness of about 0.5 micro…
Plastic bending of (5,5)@(10,10) double-wall carbon nanotube is analyzed using nudged elastic band minimum energy path calculations. At lower applied bending curvature, only the outer tube deforms plastically. However, at higher bending curvature, both the inner and outer tubes deform plastically. We find that the pla…
We present magnetization measurements on the single-molecule magnet Fe8 in the presence of pulsed microwave radiation. A pump-probe technique is used with two microwave pulses with frequencies of 107 and 118 GHz and pulse lengths of several nanoseconds to study the spin dynamics via time-resolved magnetization measure…
We have investigated electrical properties and the depolarization temperature of lanthanoid substituted (Bi 1/2 Na 1/2 )TiO 3 (BNT) ceramics. BNT and (Bi 1/2 Na 1/2 ) 1 − 1.5x V x/2 Ln x TiO 3 (V = Vacancy, Ln = La, Nd, Sm, Ho, Yb, x = 0.003-0.02; BNTLn100x) ceramics were prepared by ordinary ceramic fabrication proce…
The effects of sintering temperature on microstructure, density and electrical properties of Na0.5K0.5NbO3 prepared by normal sintering at 1020–1100°C were investigated. All the Na0.5K0.5NbO3 ceramics showed an orthorhombic structure similar to that of KNbO3 ceramics, while raising sintering temperature resulted in th…
Abstract Poly(propylene succinate)/poly(ε‐caprolactone) (PPSu/PCL) 25/75, 50/50, and 75/25 w/w copolymers were prepared using a combination of polycondensation and ring opening polymerization. The randomness of copolymers was characterized using 1 H NMR and 13 C NMR spectroscopy. From molecular weights and DSC measure…
1–3 piezoceramic/epoxy composites containing 26 and 55 vol% potassium sodium niobate (KNN) ceramic phase were fabricated via a dice and fill method, respectively, by which fine-scale KNN ceramic rods with a high aspect ratio (height/width) of 8.5, a lateral width of 80 μ m and 70 μ m spacing were obtained. The microst…
A combination of two model approaches was used to explore the nature of silicone–protein interactions. Phage display technology was used to present a combinatorial library of peptides, in this case the phage library PhD.-12, to a series of model silicone surfaces. Solid, molecular cage silsesquioxanes were used as the…
The molten salt waste from a pyroprocess to recover uranium and transuranic elements is one of the problematic radioactive wastes to be solidified into a durable wasteform for its final disposal. By using a novel method, named as the GRSS (gel-route stabilization/solidification) method, a molten salt waste was treated…
Interstitial lithium and sodium have been suggested as alternatives to phosphorus to achieve shallow $n$-type doping of diamond. Experimental results have, however, been contradictory. We report ab initio density functional theory modeling of lithium and sodium in diamond and show that although interstitial Li and Na…
Structures formed by a colloidal suspension of silica particles in 4-methyl cyclohexanol have been analyzed in the presence of an electric field. The formation of chains of particles was detected using an elliptical mirror to collect scattered light and a nearly matched refractive index between particles and solvent.…
We investigate the Cooper-pair propagation and the Josephson effect in graphene under conditions in which the distance $L$ between superconducting electrodes is much larger than the width $W$ of the contacts. In the case of undoped graphene, we show that supercurrents may exist with a spatial decay proportional to ${W…
Covalent solid $\ensuremath{\beta}\text{\ensuremath{-}}{\mathrm{C}}_{3}{\mathrm{N}}_{4}$ has received considerable attention in the last two decades since it was predicted to be a superhard material based on its high bulk modulus that is comparable to that of diamond. Here, we report first-principles calculations that…
Self-supporting films of montmorillonite, a smectite clay, were prepared by filtering suspensions of montmorillonite exchanged with a variety of cations. Their surface roughness was characterized by AFM and optical microscopy and their mechanical properties were investigated by tensile tests. We have shown that the pr…
Farm-raised catfish are important to the economy of the southeastern states in the United States, and catfish processing produces about 55% of by-products for inexpensive sale. Therefore, the utilization of catfish by-products is of great interest to the catfish industry. The objectives of this research were to determ…
We study the two orbital double-exchange model in two dimensions including antiferromagnetic (AFM) superexchange, Jahn-Teller coupling, and substitutional disorder. At hole doping x = 0.5 we focus on phase competition between the ferromagnetic metal (FMM) and the charge-ordered (CO) and orbital-ordered (OO) CE state a…
Abstract The first synthesis of asymmetric dendritic‐linear‐dendritic ABC block copolymers, that contain a linear B block and dissimilar A and C dendritic fragments is reported. Third generation poly(benzyl ether) monodendrons having benzyl alcohol moiety at their “focal” point were activated by quantitative titration…
Organic-based chromophores are used as a basic material for electo-optic (EO) devices. The chromophores, to act in an EO material, must be acentrically aligned, which is generally achieved by applying an electric poling field. Calculating, from first principles, the extent of the alignment has proven to be challenging…
We have investigated the spin dynamics of $\mathrm{Y}\mathrm{Mn}{\mathrm{O}}_{3}$ by inelastic neutron scattering and determined the spin-wave dispersion at low temperature. The spin-wave dispersions at low temperature have been analyzed with a simple nearest-neighbor anisotropic Heisenberg model and also by an anisot…
Ultraviolet (UV)-induced chemical reactions and inactivation of microorganisms in transparent and opaque fluids are strongly dependent upon the homogenous exposure of the target species to the UV irradiation. Current UV technologies used in water disinfection and food preservation applications have limited efficacy du…