Materials Literature
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We recently discovered that poly(aspartate) (PAA) hydrolase-1 from Pedobacter sp. KP-2 has a unique property of specifically cleaving the amide bond between β-aspartate units in thermally synthesized PAA (tPAA). In the present study, the enzymatic synthesis of poly(α-ethyl β-aspartate) (β-PAA) was performed by taking…
A new Cu(II), Ni(II), Fe(III), and Sn(II) complexes of captopril (CAP) have been prepared and characterized using elemental analysis, IR spectra, molar conductance, and thermal analysis (TG). Thermal stabilities and the decomposition steps have been designed using thermogravimetric analyzer. Thermodynamic parameters w…
The aim of this work was to produce alumina-zirconia nanopowder through the gel-net method at low temperature. The monomers acrylamide, N, N′-methylene-bis-acrylamide, persulphates and N,N,N′,N′-tetra methyl ethyl diamine were used. The resultant network trapped and coordinated particles so that inhibited aggregation…
Sea urchin-like and plates CuO nanostructured have been prepared via a thermal decomposition reaction of CuC2O4 at 300°C for 1 h. The morphology and structure of the synthesized sea urchin-like structures were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and transmissio…
Potassium birnessite nanotubes have been made through a templated hydrothermal route with specific surface areas and pore volumes as high as 110 m2 g-1 and 0.54 cm3 g-1 respectively. After casting into electrode films and assembling into hybrid supercapacitor cells, good cyclability has been demonstrated, with high co…
This study investigated the phase-change activities on a gallium-doped indium oxide (Ga:InO) device that can be supplied with a constant heat flow via symmetric contact to a pair of rodlike heating elements. A device set/reset current of 0.8/18 μA and resistance window of 2.6×105 to 107 Ω can be found on Ga:InO with a…
A detailed study of the rheological properties of silicone oil gels, made from a low-molecular-mass organic gelator, a combination of 1-octadecylamine (a latent gelator) and carbon dioxide (an 'activating' molecule), is reported. Information gleaned from the mechanical measurements is used to characterize the gel netw…
We derive a nonsingular, polarization-dependent, 3D impulse response that provides unambiguously the wave field scattered by a negative-refractive-index layered lens and distributed in its image volume. By means of a 3D Fourier transform, we introduce the generalized amplitude transfer function in order to gain a deep…
We have investigated multiwalled carbon nanotubes decorated with TiO2 nanoparticles. Scanning electron microscopy and transmission electron microscopy measurements revealed that the TiO2 incorporates on the nanotubes forming large cauliflowerlike aggregates and/or small crystalline particles attached to the nanotube w…
Reactions that look after themselves: Interfacial instabilities caused by chemical reactions can increase the area of contact between fluids and enhance their mixing or dispersion. Although instabilities in macroscopic liquid/liquid systems are well-understood, “reactive mixing” at molecular length scales presents a c…
In this paper we demonstrate the use of the acoustic detection as an alternative way to determine the entropy variation, Δ S T , a parameter normally used to characterize the magnetocaloric effect. The measurements were performed for a Gd sample in the 252–316 K temperature range for magnetic fields from zero up to 50…
( 1 − x ) Pb ( Zr 0.4 , Ti 0.6 ) O 3 – ( x ) Bi ( Zn 0.5 , Ti 0.5 ) O 3 (PZT-BZT) (x=0, 0.03, 0.05, 0.08, and 0.1) films were deposited on Pt(111)/Ti/SiO2/Si(100) substrates by chemical solution deposition using spin-coating. All samples showed highly (111) oriented perovskite phase and no other phase was observed. Th…
Complex crystalline ground state structures may be obtained by direct (simulated) quenches from the melt for systems of up to a few hundred atoms, given the constraint of a fixed unit cell, coupled with use of (i) replica-exchange Monte Carlo, and (ii) realistic empirical interaction pair potentials. We applied this p…
The response of graphitelike BC3 phases (t-BC3) to shock-wave loading has been studied using two types of high explosives, in order to investigate the possible routes to synthesize via dynamic compression superhard materials in the form of high-pressure phases such as the B-doped diamond produced recently under high s…
A theoretical model about the size-dependent interface energy between two thin films with different materials is developed by considering the chemical bonding contribution based on the thermodynamic expressions and the structure strain contribution based on the mechanical characteristics. The interface energy decrease…
Highly oriented Pb(Fe1/2Ta1/2)O3 (PFT) film is fabricated on conducting La0.67Sr0.33CoO3 coated (100) MgO substrate using pulsed laser deposition technique. The x-ray diffraction pattern shows single phase compound having preferential orientation along (100) plane. Surface topography of the film indicates homogeneous…
The complexes of europium with dibenzoylmethane (= HDBM) and mixed-ligand complexes containing 1,10-phenanthroline (= phen) or 4,7-diphenyl-1,10-phenanthroline (= dpp) are synthesized by different methods (already proposed in the literature) and their elemental composition, I.R., 1H and 13C NMR, and fluorescence excit…
High-resolution x-ray photoelectron spectroscopy of strontium bismuth tantalate films revealed distinct chemical states of constituent atoms in fluorite and perovskite crystals. Reflecting the number of nearest-neighbor oxygen atoms coordinated with Bi3+ ions, the Bi 4f peak could be deconvoluted into Bi2O3 (sixfold c…
We use numerical simulations to study the phase behavior of a system of purely repulsive soft dumbbells as a function of size ratio of the two components and their relative degree of deformability. We find a plethora of different phases, which includes most of the mesophases observed in self-assembly of block copolyme…
The paper contains a detailed discussion of the electronic structure of the novel hard and thermally stable amorphous SiBCN materials. We focus on the weight of individual electronic states on different elements, bond types, bonds of different lengths, and the number of atoms and clusters of atoms the states are local…