Materials Literature
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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…
A novel method based on utilizing varied ionic strength and specific adsorption was developed to prepare c ‐oriented zinc oxide (ZnO) films with controlled morphology in aqueous solution. Structure and morphology of the films were investigated by using X‐ray diffraction, scanning electron microscopy, field emission sc…
Abstract Summary: Polyaniline (PANI) nanowires and sub‐micro/nanostructured dendrites are synthesized and immobilized on PP‐ g ‐PAA film surfaces via routine oxidative polymerization of aniline under different conditions, where grafting poly(acrylic acid) (PAA) served as a template and dopant, and SDS as a surfactant.…
Abstract Hybrid silica particles comprised of an inorganic core and an organic polymer shell can be synthesized by surface‐initiated nitroxide‐mediated polymerization (SINMP) in the presence of a grafted alkoxyamine as initiator. The layer of initiator molecules attached or adsorbed to the particles surface is based o…
Second harmonic generation hyperpolarizabilities and their geometric derivatives have been calculated for HF, HCl, CO, and LiF, using the coupled cluster hierarchies, CCS, CC2, CCSD, CC3, and large correlation-consistent basis sets. The full configuration interaction results have been used to test the accuracy of the…
A nonvolatile flash memory device has been fabricated using carbon nanotubes (CNTs) as a floating gate embedded in HfAlO (the atomic ratio of Hf∕Al is 1:2) high-k tunneling/control oxides and its memory effect has been observed. Capacitance-voltage (C-V) measurements illustrated a 400mV memory window during the double…
We report on the controlled multiphase thin film growth in the Bi–Fe–O system. By varying the deposition oxygen pressure, the dominant phase formed in the film continuously changes from ferroelectric BiFeO3 to a mixture of α-Fe2O3 and ferromagnetic γ-Fe2O3. X-ray diffraction and high-resolution transmission electron m…
Cylindrotheca closterium (Ehrenberg) Reiman et Lewin is a raphid diatom widely distributed in mudflat assemblages. Video microscopy showed various movement modalities defined as smooth and corkscrew gliding, pirouette, pivot, rock and roll, rollover, and simultaneous pirouette and gliding. Z ‐axis projection analysis…
We calculate the heating and cooling of the accreting white dwarf (WD) in the ultracompact AM Canum Venaticorum (AM CVn) binaries and show that the WD can contribute significantly to their optical and ultraviolet emission. We estimate the WD's effective temperature, T eff , using the optical continuum for a number of…