Materials Literature
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The equilibrium geometry, energetic, and electronic properties of antisites and vacancies in $\mathrm{B}{\mathrm{C}}_{2}\mathrm{N}$ nanotubes are studied by spin density-functional calculations. We investigate these defects in both the zigzag (4,0) and the armchair (3,3) nanotubes. We find that boron and nitrogen, occ…
A versatile and highly efficient zwitterion method to functionalize single-walled carbon nanotubes (SWCNTs) as well as fullerenes has been developed. This approach employs a combination of moderately weak electrophiles and nucleophiles to create reactive zwitterions, which are the key intermediates toward the function…
Future nanoscale electronics built up from an Avogadro number of components need efficient, highly scalable, and robust means of communication in order to be competitive with traditional silicon approaches. In recent years, the networks-on-chip (NoC) paradigm emerged as a promising solution to interconnect challenges…
Crosslinked polyethylene (XLPE) has become the globally preferred insulation for power cables, both for distribution and transmission system applications. This insulation system provides cost efficiency in operation and procurement, as well as lower environmental and maintenance requirements when compared to older imp…
A homologous series of PEG (various chain length)-substituted octasilsesquioxanes prepared by the hydrosilylation of unsaturated PEGs (poly(ethylene glycol)s) with octa(dimethylsiloxy)silsesquioxane (Q 8 M 8 H ) were studied by wide-angle X-ray diffraction WAXD and rheology. The WAXD results indicate that neat POSS is…
The charge-transfer quenching of photoexcited TiO 2 nanoparticles by hexanethiolate monolayer protected gold clusters (MPCs) with core diameters of 1.1−4.9 nm is reported. The quenching efficiency of Au MPCs was compared using Stern−Volmer plots. The quenching constants ( K Q ) taken from slopes of the plots reveal th…
Based on a Marx generator and a coaxial pulse forming line, an experimental investigation of surface flashover characteristics in vacuum is conducted by using nanosecond pulses of 10 ns rise time and 30 ns full width at half maximum (FWHM). Insulator dielectrics chosen for this investigation are Teflon, PMMA and Nylon…
A new program package based on the Microsoft Windows operational systems is proposed for thermal investigations of crystals. The package consists of two programs, one of which provides a means for calculating the thermal expansion tensor for crystals of any symmetry and the second program is intended for drawing three…
This paper presents an experimental analysis of the effect of dose and dose rate parameters during gamma irradiation of high-density polyethylene (HDPE) samples. Considerations concerning the influence of these parameters on HDPE mechanical strength properties as a result of the predominance of oxidative degradation o…
Mg x Zn 1 − x O (0.0⩽x⩽0.12) thin films have been deposited on glass substrates by sol-gel process. The hexagonal wurtzite structure of ZnO is retained in the Mg-substituted films. From the photoresponse measurements, it is observed that both ZnO and substituted films are UV sensitive and with increasing Mg content, t…
CdS nanoparticles have been synthesized by a chemical reaction route using \nethylenediamine as a complexing agent. The nanoparticles were characterized using \ntechniques such as X-ray powder diffraction (XRD), scanning electron microscope \n(SEM), UV–VIS absorption spectroscopy, and photoluminescence spe…
Hollow nanoparticles represent an emerging area of development for the encapsulation of active ingredients. Expanding the capabilities of these nanomaterials will require continued efforts to infill properties such as size control, biodegradability, and environmental responsiveness. Acid-labile poly(N-vinylformamide)…
The optical properties of quantum dots (QDs) have made them attractive materials in diverse fields of application. Since water‐soluble derivatives were obtained, quantum dots have attracted intensive research interest in sensing, diagnosis, imaging, and optical tracking. The analytes that have been targeted span ions,…
We predict, from computer modeling and simulation in partnership with experiment, a general strategy for synthesizing spherical oxide nanocrystals via crystallization from melt. In particular we "simulate synthesis" to generate full atomistic models of undoped and Ti-doped CeO2 nanoparticles, nanorods, and nanoporous…
Fluorine doped tin oxide (FTO) thin films have been prepared by spray pyrolysis technique with no further annealing. Films with 2.5% of fluorine grown at 400 °C present a single phase and exhibit a tetragonal structure with lattice parameters a = 4.687 Å and c = 3.160 Å. Scanning electron micrographs showed homogeneou…
The aim of this study was to provide a practical approach towards discovering the anisotropic behaviors of polyvinyl chloride (PVC)-coated fabrics under low tensile stresses, as well as those at the tensile failure stage. Test specimens were PVC-coated polyester woven fabrics. One group of bias tensile experiments, wi…
Archaea are abundant and drive critical microbial processes in the Earth's cold biosphere. Despite this, not enough is known about the molecular mechanisms of cold adaptation and no biochemical studies have been performed on stenopsychrophilic archaea (e.g., Methanogenium frigidum). This study examined the structural…
The transmission lines most frequently used in corrosion studies are discussed. The interpretation of impedance data for cylindrical pores, and irregularly-shaped noncylindrical pores, frequently used in studies of pitting corrosion is analyzed. A ladder network is used to model diffusion processes.
Next‐generation micro‐solid oxide fuel cells for portable devices require nanocrystalline thin‐film electrolytes in order to allow fuel cell fabrication on chips at a low operation temperature and with high power outputs. In this study, nanocrystalline gadolinia‐doped ceria (Ce 0.8 Gd 0.2 O 1.9− x ) thin‐film electrol…
This study reports the development of a Nd(III)-based near-IR luminescent probe for monitoring aldo-ketoreductase (AKR) enzyme activity. We have adapted a coumarin-based reporter substrate for the AKR1C2 to a near-IR emitting format by tethering the former to a macrocyclic Nd(III) moiety via an alkyl linker. Enzymatic…