Materials Literature
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Nanostructured nickel oxide thin films were prepared by the pulsed laser ablation technique. The effects of annealing on the structural, morphological, electrical and optical properties are discussed. Phase imaging was used to examine the surface contaminants, adhesion and hardness and height imaging to evaluate the h…
Nephrogenic systemic fibrosis (NSF) is a devastating complication of severe renal failure. Recent reports suggest that exposure to gadolinium-containing contrast agents (GCCA) is associated with the occurrence of NSF. The population of patients with ESRD in and around Bridgeport, CT, was studied during an 18-mo period…
Well-aligned ZnO nanorod and nanopencil arrays were synthesized in a high density on ZnO/Si substrate by a low-temperature aqueous solution technique. Detailed structural characterizations revealed that the as-synthesized nanorods and nanopencils were single crystalline, with a hexagonal phase, and with growth along t…
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Good dispersion and alignment of multiwalled carbon nanotubes (MWCNTs) in cellulose is achieved by dissolution in an ionic liquid and subsequent grinding and spinning. This simple method of preparing regenerated-cellulose/MWCNT composite fibers could lead to the production of carbon fibers from a renewable resource (c…
We report the use of fluorescein−polyethylene glycol (Fluor-PEG) to noncovalently functionalize single-walled carbon nanotubes (SWNTs) for obtaining water-soluble nanotube conjugates (Fluor-PEG/SWNT) and simultaneously affording fluorescence labels to nanotubes. We find serendipitously that fluorescein, a widely used…
Every nucleolus has a silver lining: Formation of silver nanoclusters by fluorescence photoactivation was used for the staining of cells at low silver nitrate concentrations and ambient temperature. The picture shows picosecond lifetime images of peptide-encapsulated silver nanoclusters within NIH 3T3 cells.
The full zone-center optical phonon spectrum and the exchange coupling constant $J$ of the uniform collinear antiferromagnetic (AFM) ordered phase of $\mathrm{Zn}{\mathrm{Cr}}_{2}{\mathrm{O}}_{4}$ are calculated within density functional theory using the local spin density approximation (LSDA), the LSDA plus Hubbard $…
Methylviologen dications (MV2+) were immobilized between layers of manganese oxide during their electrochemical assembly by an anodic route in a homogeneous aqueous Mn2+ solution. This approach yielded a well-ordered multilayer film on a platinum substrate as a result of dense packing of planar MV2+ molecules to stabi…
A structure using the two-way shape memory effect (TWSME) returns to its initial shape by increasing or decreasing the temperature under initial residual stress. Through the thermo-mechanical constitutive equation of the shape memory alloy (SMA) proposed by Lagoudas et al (1996 Mech. Compos. Mater. Struct. 3 153–79),…
The molecule-based magnet $\mathrm{V}{(\mathrm{TCNE})}_{x}$, with $\mathrm{TCNE}=\text{tetracyanoethylene}$, $x\ensuremath{\approx}2$, shows an exceptionally high magnetic ordering temperature of about $400\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. With the aim to shed light on the origins of the robust magnetic ordering…
Abstract By contrast to polyethylene terephthalate (PET), extrusion foaming of polybutylene terephthalate (PBT) to medium–low densities has been seldom reported in the literature. In this study, a commercial linear PBT resin was reactively modified in a batch mixer to a branched structure with a higher molecular weigh…
Abstract This study evaluated the effects of the deposition of a thin hydrophobic silicon coating onto a polysaccharide film's surface. The goal was to improve the water vapour barrier of the hydrophilic film in order to increase the film's usefulness in packaging applications. A cold‐plasma technique was used to crea…
Abstract Epoxy/silsesquioxane‐OH (EP‐SDOH, ED) hybrid resins were prepared from cyclohexyl‐disilanol silsesquioxane (SDOH) and diglycidyl ether of bisphenol A via the reaction between silanol and the oxirane group, with the cobalt naphthanate as a catalyst. It was found that incorporation of SDOH allows the reaction b…
Abstract Silica/titania binary inorganic component was synthesized by a nonhydrolytic sol‐gel method. Fourier transform infrared spectroscopy (FT‐IR) and transmission electron microscopy (TEM) results indicated that titania was stabilized by silica because of the formation of a connecting structure, which would greatl…
We have investigated thin-film field-effect transistors (TFT's) with ${\mathrm{C}}_{60}$ as the active material, and we report the effects of photoinduced polymerization of the ${\mathrm{C}}_{60}$ film. We find that the effects of a complete polymerization for a typical top-contact ${\mathrm{C}}_{60}$ TFT are as follo…
One-dimensional Au rows are produced on the TiO 2 (110) surface by controlled photon-stimulated desorption followed by Au deposition at 750 K. In the resulting (1 × 2) structure, O vacancies are replaced by Au atoms, as demonstrated by combined laterally resolved x-ray spectroscopy and micro-LEED (low-energy electron…
We present measurements on the single-molecule magnet ${\mathrm{Fe}}_{8}$ in the presence of pulsed microwave radiation at $118\phantom{\rule{0.3em}{0ex}}\mathrm{GHz}$. The spin dynamics is studied via time-resolved magnetization experiments using a Hall-probe magnetometer. We investigate the relaxation behavior of ma…
Abstract To gain a foam plastic with excellent mechanical properties, tensile mechanical properties of methacylic acid/acrylonitrile (MAA/AN) copolymer and the corresponding foam microstructure were studied, and furthermore effects of the density, heat treatment, and crosslinking agent on foam mechanical properties we…
Abstract Poly(butylene succinate) (PBS)/clay nanocomposites were prepared by condensation polymerization of 1,4‐butanediol and succinic acid in the presence of an organoclay containing epoxy groups (TFC) and titanium(IV) butoxide as a catalyst. The intercalation and exfoliation of the clay layers in the resulting comp…