Materials Literature
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This work describes the superlow fouling properties of glass slides grafted with zwitterionic polymers to highly resist the adsorption of proteins and the adhesion of mammalian cells. Glass slides were first silanized using 2-bromo-2-methyl-N-3-[(triethoxysilyl)propyl]propanamide (BrTMOS). Two zwitterionic polymers, p…
Abstract The temperature dependence of direct current (dc) conductivity was studied for various samples of polyaniline-polyvinylchloride (PANI-PVC) blended films. Polyaniline was doped with different concentrations of sulfamic acid in aqueous tetrahydrofuran (THF) and the blended films were prepared by varying the amo…
The temperature dependence of the resistivity, ρ, of ceramic LaMnO 3+δ with δ = 0.065 and 0.154 (or simply # 065 and # 154), is investigated under hydrostatic pressure, p , between the temperatures T = 80 and 320 K in magnetic fields up to 10 T. The data for ρ( T ) are analysed within a Shklovskii–Efros-like variable-…
The ac electrical conductivity of the oxalic acid dihydrate ($\ensuremath{\alpha}$-POX) was investigated as a function of the frequency and temperature. The real part of the complex ac electrical conductivity was found to follow the universal dielectric response ${\ensuremath{\sigma}}^{\ensuremath{'}}\ensuremath{\prop…
We have investigated the thermodynamic and structural properties of types I and II silicon clathrates through Monte Carlo simulations. Using efficient methods to determine free energies, we studied the stable and metastable relations between the various phases of Si, namely, crystalline, liquid, amorphous, and the two…
The dielectric properties and microstructural characteristics in solid solutions of Ba 1− x La x [Zn (1+ x )/3 Nb (2− x )/3 ]O 3 (BLZN) are investigated by measuring and observing these properties, respectively, by means of transmission electron microscopy and Raman spectroscopy. The 1:1 ordered structure of BLZN can…
Abstract In situ ‐reinforcing composites based on two elastomer matrices very different in melt viscosity, styrene–(ethylene butylene)–styrene triblock copolymer (Kraton G1650), and styrene–(ethylene propylene) diblock copolymer (Kraton G1701), and a thermotropic liquid crystalline polymer (TLCP), Rodrun LC3000, were…
Abstract Proprietary polyurea‐based thermosets were produced from polyisocyanate and water glass (WG) using a phosphate‐type phase transfer catalyst. WG was dispersed in the polyisocyanate resulting in water‐in‐oil (W/O) type emulsion. The polyurea matrix, formed after crosslinking, contained the WG derived silicate i…
A low-Mach-number analysis is presented of the collapse of a bubble in an electric field, which is assumed to be homogeneous, but may be unsteady. Ellipsoidal shape deformations are accounted for in the analysis, but are assumed to be small. It is shown that the presence of an electric field leads to additional terms…
The phases of PLZT, (Pb,La)(Zr,Ti)O 3 , or L / Z / T for L <12 and T <10 were detected via determination of capacitance at varying temperatures at 0 field and via polarization at varying fields at room temperature and at selected elevated temperatures. It was possible to determine two different orthorhombic phas…
Nanoscale Mg(OH) 2 with different morphologies, from nanosheets, nanosquares, and nanodisks, have been successfully synthesized via a simple hydrothermal reaction of Mg(CH 3 COO) 2 and sodium hydroxide in the presence of citrate. Direct observation of transformation from nanosheets to nanodisks indicates clearly the g…
We have imaged boron nitride nanotubes with atomic scale resolution using scanning tunneling microscopy. While some nanotubes show the expected triangular lattice pattern, the majority of the nanotubes show unusual stripe patterns which break the underlying symmetry of the boron nitride lattice. We identify the origin…
When P and K fertilizer are applied to soil at the same time, the movement and transformation of K may be affected by P. This study was conducted to quantify the effects of monocalcium phosphate (MCP) co‐applied with KCl on the distance of K movement, the concentration of K in different forms and soil pH change at dif…
We studied the electronic structure of the ${\mathrm{Ca}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{V}{\mathrm{O}}_{3}$ series using a cluster model. The coherent structure is mostly due to a nonlocal coherent screening $(3{d}^{1}\underset{̱}{C})$, whereas the incoherent feature is mainly related to the ligand screen…
In this work, a soft lithographic approach has been developed to fabricate free-standing azo polymer microwires with unique photoprocessible characteristics. In the process, an epoxy-based azo polymer (BP-AZ-CA) was used to prepare both the soft lithographic masters and the microwires. The masters were prepared by pho…
Abstract The miscibility or complexation of poly(styrene‐ co ‐acrylic acid) containing 27 mol % of acrylic acid (SAA‐27) and poly(styrene‐ co ‐ N , N ‐dimethylacrylamide) containing 17 or 32 mol % of N , N ‐dimethylacrylamide (SAD‐17, SAD‐32) or poly( N , N ‐dimethylacrylamide) (PDMA) were investigated by different te…
We present a method for applying hydrostatic pressure in the computer simulation of nanoparticles, using an ideal gas as the pressure medium and thermostat. As the equation of state is known for the ideal gas, the exerted pressure can easily be tuned by adjusting the number of gas particles, while the temperature is c…
Using an accurate density-functional method, we study a series of ternary transition-metal compounds based on the rock-salt IV-VI semiconductor GeTe for potential use as half-metallic ferromagnets, because some of such materials have already been fabricated and proved experimentally to be ferromagnetic. We find four h…
Polypyrrole was electrochemically synthesized onto a gold electrode in the presence of sodium p-toluenesulfonate (TSNa) as the key dopant. Under the optimal synthesis condition, the surface morphology of PPy/TSNa was tailored and exhibited a nano-tentacle structure. The resulting rough and fuzzy morphology greatly enh…
We wish to show that gas-phase studies of small metal cluster-biomolecule complexes provide fundamental insights into the mechanism leading to enhanced optical absorption in nanoparticle-biomolecular hybrid systems. Here we present, for the first time, a joint experimental and theoretical study of photoabsorption and…