Materials Literature
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We report electronic and structural properties of cubic and hexagonal $3\mathrm{C}\text{\ensuremath{-}},\phantom{\rule{0.3em}{0ex}}2\mathrm{H}\text{\ensuremath{-}},\phantom{\rule{0.3em}{0ex}}4\mathrm{H}\text{\ensuremath{-}}$, and $6\mathrm{H}\text{\ensuremath{-}}\mathrm{SiC}$ bulk crystals and of the C-terminated $\ma…
DFT(PW91/TZP) calculations, including full geometry optimizations, have been carried on [FeII(P)(NO2)]-, Fe(III)(P)(NO2), [Fe(II)(P)(NO2)(py)]-, Fe(III)(P)(NO2)(py), [Fe(III)(P)(NO2)2]-, and Fe(III)(P)(NO2)(NO), where P is the unsubstituted porphine dianion, as well as on certain picket fence porphyrin (TPivPP) analog…
A novel complex-assisted hydrothermal route is presented to fabricate ultralong Ag/C nanocables with length ranging from 100 to 180 microm on a large scale, based on the reaction of sulfamic acid silver and salicylic acid. By chemical etching of these Ag/C nanocables, high-quality carbonaceous nanotubes can be obtaine…
RNA is used to purify carbon nanotubes (CNTs) in a simple, two-step method that does not require a time-intensive process or harsh chemical or physical treatments. The purity of the RNA-purified CNTs is demonstrated by a variety of physical characterization methods such as AFM (see figure), confirming that treatment o…
We report Fe-doped $\mathrm{NiO}$ nanopowder, exhibiting room ferromagnetism mainly arising from the double exchange mechanism through the doped Fe ions and free charge carriers. Electrical measurements reveal that ac conductivity of the polycrystalline ceramics with Fe-doped $\mathrm{NiO}$ can be expressed as the sum…
OBJECTIVES: Prospective studies and retrospective analyses were undertaken to evaluate the clinical safety of gadobenate dimeglumine (MultiHance) and to assess tolerability in special populations. MATERIALS AND METHODS: A total of 3092 subjects received MultiHance in 79 clinical trials. Data from comparisons with othe…
A bolaform surfactant, 1,12-diascorbyl dodecanedioate (BOLA12), with ascorbic acid units as the polar headgroups was synthesized for the first time. Once dispersed in water above 0.5% w/w, BOLA12 forms hollow nanotubes as revealed by cryo-TEM experiments. These nanostructures transform into clear micellar solutions on…
The nearly free electron state of a carbon nanotube drops rapidly in energy relative to the other conduction bands under alkali doping. A natural (and previously proposed) explanation for this rapid downshift is hybridization with the potassium states. However, we show that the downshift occurs even when the extra ele…
Abstract Scanning electron microscopy (SEM) has frequently been used to study semiconductor materials. It offers the possibility of obtaining reliable qualitative and quantitative information on relevant local material parameters. The temperature rise due to electron‐beam bombardment can influence some semiconductor p…
Melt rheology and mechanical properties of binary blend of low-density polyethylene (LDPE) and high-density polyethylene (HDPE) have been investigated. Four different wt fractions of blends containing LDPE/HDPE (20/80, 40/60, 60/40, and 80/20) were prepared. Cole-Cole plots [storage melt viscosity (η′) vs. loss melt v…
Abstract The adsorption of benzotriazole (BTA) on commercial copper surfaces in hydrochloric (HCl) acid concentrations from 1 × 10 −3 to 5 × 10 −1 M was investigated using gravimetric measurements. BTA in bulk solution was tested in concentrations from 1 × 10 −5 to 1 × 10 −1 M at temperatures from 298 to 328 K. The ad…
Films consisting of a vanadium pentoxide (i.e., V 2 O 5 ) phase formed within a rubbery block copolymer were developed for their potential use as nanocomposite cathodes in lithium rechargeable batteries. Nanocomposite films were prepared by sol−gel synthesis from vanadyl triisopropoxide precursor in poly(oligooxyethyl…
Abstract A study of the adsorption of NO 2 on a nanocrystalline tin(IV) oxide powder was carried out in situ by Raman spectroscopy. Heat treatment up to 300 °C of the sample in NO 2 revealed the complexity of the surface reactions. Thus, numerous NO x adsorbed species were evidenced such as weakly adsorbed nitrates, N…
High charge mica samples, with layer charge values between 2 and 4, have been synthesized via the sodium chloride melt procedure, and their hydrothermal reactivities for the formation of lutetium disilicate have been evaluated. Characterization of the synthesized micas, through a combination of techniques that inform…
A series of primary, secondary, and tertiary amines have been examined as cosolvents with trioctylphosphine oxide (TOPO) for the synthesis of CdSe nanoclusters. Syntheses were conducted in 66 mol % hexadecylamine (HDA), dodecylamine (DDA), dioctylamine (DOA), or trioctylamine (TOA) in TOPO and the growth rates and siz…
Crystallization of DL-alanine is studied as a single polymorph model case to analyze the different modes of crystallization of polar organic molecules in absence of any structure directing additives. Depending on supersaturation, which is controlled either by temperature or by pH, and in the absence of additives, crys…
PURPOSE: Although contrast agents have become indispensable tools in magnetic resonance and their safe and effective use the foundation of many essential diagnostic procedures, only limited summary information on their utilization and pharmacovigilance is available to the community. After voluntary access to the manuf…
Abstract The effects of oxygen plasma treatment and the subsequent air exposure on the surface composition and properties of bisphenol A polycarbonate (BPA‐PC) were analysed by X‐ray photoelectron spectroscopy (XPS), ellipsometry, static time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) with principal componen…
BACKGROUND: Autologous conduits are not available in up to 40 per cent of patients with arteriopathy who require coronary or lower limb revascularization, and access sites for renal dialysis may eventually become exhausted. Synthetic prostheses achieve a poor patency rate in small-calibre anastomoses. This review exam…
This paper reports the inhibition efficiency of a family of synthetic amine/ammonium-containing cationic polymers in colloidal silica particle growth. Three polymeric additives were tested and compared to control samples. These are polyethyleneimine (PEI), polyallylamine hydrochloride (PALAM), and poly(acrylamide- co…