Materials Literature
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Abstract 4‐vinylpyridine monomer was mixed with organophilic montmorillonite (MMT) clay and polymerized in the presence of free‐radical initiator. MMT clay was rendered organophilic by means of ion‐exchanging sodium cations for low‐molecular‐weight quaternized poly(4‐vinylpyridine) (P4VP) homopolymer and diblock copol…
CdS nanowires of 10nm diameter, electrodeposited in porous alumina films, had shown a conductance bistability in the past [Appl. Phys. Lett. 76, 460 (2000)]. The conductance has a high (ON) and a low (OFF) state. In the ON state, different sets of nanowires display qualitatively different relation between the conducta…
The present study describes the synthesis of novel polypeptides containing O-phospho-L-threonine [Thr(PO(3)H(2))] and L-aspartic acid. Random copolypeptides copoly[Thr(PO(3)H(2))(X)Asp(Y)] (X:Y = 25:75, 50:50, 75:25), were conventionally prepared by copolymerization of Thr(PO(3)Ph(2)) N-carboxyanhydride (NCA) and Asp(…
Abstract FT‐IR and FT‐Raman spectra of sulfanilic acid were recorded and analysed. Surface enhanced Raman scattering (SERS) spectrum was recorded on a silver electrode surface. Potential dependence of SERS profile was studied. The profile was most prominent at an electrode potential of −1.2 V. The molecule was adsorbe…
Abstract Summary: Branched poly(arylene ether)s were prepared in an oligomeric A 2 + B 3 polymerization of phenol endcapped telechelic poly(arylene ether sulfone) oligomers as A 2 and TFPPO as trifunctional monomer B 3 . The molar mass of the A 2 oligomer significantly influenced the onset of gelation and the DB. A hi…
Abstract Summary: The polymerization features of the novel stabilizer‐free dispersion copolymerization of MAn and VAc were studied. It was found that the dispersion copolymerization of MAn/VAc is a fairly rapid process, which starts from a slow solution polymerization (below 10% conversion, Stage I) and follows a dras…
In this paper we report comprehensive experimental and theoretical investigation of magnetic and electronic properties of the intermetallic compounds ${\mathrm{Pr}}_{2}{\mathrm{Fe}}_{17}$ and ${\mathrm{Gd}}_{2}{\mathrm{Fe}}_{17}$. Electronic structure of these two systems was probed by optical measurements in the spec…
An ellipsometric study of the interface between a thermotropic liquid crystal and water near the nematic-isotropic phase transition of the liquid crystal is presented. At temperatures above the transition, a nematic wetting layer appears at the interface if the water phase contains a surfactant inducing a homeotropic…
Metal-insulator-semiconductor field-effect transistors (MISFETs) with aluminum oxide as a gate insulator have been fabricated on a hydrogen-terminated diamond surface using its surface conductive layer. The aluminum oxide gate insulator was deposited on the diamond surface by the pulsed laser deposition method. The on…
Community dynamics of epiphytic diatoms were studied for 3 years in a chronically and an episodically acidified tributary of Buck Creek, Adirondacks. Both streams experienced pulses of acidity during hydrologic events but these pulses were more pronounced in the episodically acidified stream, where pH decreased over t…
We report a wafer scale approach for the fabrication of thin-film power generators composed of arrays of 400 p and n type ErAs:InGaAs∕InGaAlAs superlattice thermoelectric elements. The elements incorporate ErAs metallic nanoparticles into the semiconductor superlattice structure to provide charge carriers and create s…
We perform the ab initio calculations of the absorption and optical magnetic circular dichroism (MCD) spectra for the Co-doped anatase and rutile ${\mathrm{TiO}}_{2}$ systems. The obtained MCD spectra correlate well with the absorption spectra, and both are in agreement with the experimental measurements, indicating t…
Quasialigned ZnMgO ternary nanorods with sharp single-crystal tips were prepared by using thermal evaporation without a catalyst. The growth process included two steps: the formation of ZnO droplets and then the formation of ZnMgO nanorods. The obtained ZnMgO nanorods with abruptly sharpened tips crystallized well as…
Abstract Summary: Poly( ε ‐caprolactone) (PCL)/chitin and PCL/chitosan blend films with compositional gradients were successfully fabricated by a dissolution/diffusion method; that is, repeatedly pouring the PCL/chitin (or PCL/chitosan) blend solutions, with variable composition, onto polysaccharide layers. The compos…
The effect of the type of solvent on the solid liquid interfacial energy was determined by performing induction time measurements of paracetamol in methanol, 1-propanol, acetone and water at a constant supersaturation temperature of 30 °C and different levels of supersaturation (a/a*) ranging from 1.03 to 1.24. At equ…
Mg x Zn 1− x O (MZO) thin films prepared by an rf magnetron sputtering technique are reported. The films were grown at room temperature and at relatively low rf power of 50 W. MZO thin films were found to possess preferred c -axis orientation and exhibited hexagonal wurtzite structure of ZnO up to a Mg concentration o…
The x-ray absorption near-edge structure (XANES) spectroscopy has been used as a “fingerprint” to address the unresolved issues related to the changes in the local structure around As and to identify its chemical state in the As-doped, p-type ZnO. The spectral features of both AsK- and OK-edge XANES spectra strongly s…
Tremendous work achieved in the last 20 years on nanoparticle synthesis has allowed us to study many new physical properties that are found in the nanometre size range. New developments are now expected when considering assemblies of nanoparticles such as 2D or 3D organized arrays. These systems are indeed expected to…
At microwave frequencies, conductor losses due to the bottom electrode resistance severely limit the performance of metal-insulator-metal capacitors that employ tunable dielectric thin films. Here we demonstrate that a novel tunable dielectric, bismuth zinc niobate (BZN), can be integrated directly with low-resistivit…
Abstract Summary: We have used the process of electrospinning to produce fibers of poly(dicyclopentadiene) with diameters on the submicron scale. The material, formed from a monomer‐catalyst solution, polymerized in flight during the electrospinning process. Fibers were collected over trenches etched in silicon and th…