Materials Literature
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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…
The absorption of nitric oxide (NO) into water with simultaneous oxidation induced by ultrasonic irradiation at a fixed frequency of 20 kHz has been studied in a bubble column reactor at about room temperature. Factors studied include the flow rate of flue gas, intensity of ultrasound, and effect of sulfur dioxide (SO…
A study of the field emission characteristics of novel structures of ZnO, namely marigolds, multipods and microbelts, has been carried out in both the close proximity configuration and the conventional field emission microscope. The use of a conventional field emission microscope overcomes the drawback of arc formatio…
Lighting the way: Through the combination of a UV-grafting process with the photoresponsive properties of spiropyran molecules, an optically reversible switching membrane surface was developed. This process can be used in preference to inducing physical movement of long-chain SAMs toward an electrode and as a result i…
Taking the high road: The unification of azide and hmp− (hmpH=2-(hydroxymethyl)pyridine) ligands has provided a route to two salts of a new Mn10 cation with an aesthetically pleasing, high-symmetry structure. The cation (see excerpt of structure; MnII yellow, MnIII blue, O red, N green, C gray) is completely ferromagn…
Diarylethene derivatives with hexaethylene glycol side chains were synthesized and their self-assembling and photochromic reactivity were investigated. The diarylethenes showed photochromism in organic solvents and even in water. The aqueous solution of the compounds turned turbid quickly upon heating. The clouding be…
Considerable efforts are being taken worldwide to utilize local natural waste and by-product materials in making concrete, such as silica fume (SF) or rice husk ash (RHA) as supplementary cementing materials to improve concrete properties (durability, strength, etc.). The effect of using SF or RHA as a partial replace…
The influence of random interlayer exchange on the phase states of the simplest magnetic heterostructure consisting of two ferromagnetic Ising layers with large interaction radius is studied. It is shown that such system can exist in three magnetic phases: ferromagnetic, antiferromagnetic and ferrimagnetic. The possib…
We have recently proposed an efficient computation method for the frictionless linear elastic axisymmetric contact of coated bodies [A. Perriot and E. Barthel, J. Mat. Res. 19 (2004) 600]. Here we give a brief description of the approach. We also discuss implications of the results for the instrumented indentation dat…
We analyze in details the atomistic response of a model amorphous material submitted to plastic shear in the athermal, quasistatic limit. After a linear stress-strain behavior, the system undergoes a noisy plastic flow. We show that the plastic flow is spatially heterogeneous. Two kinds of plastic events occur in the…
We report the synthesis, crystal structure, and magnetic properties of the $S=1$ 2-leg spin-ladder compound ${\mathrm{Na}}_{2}{\mathrm{Ni}}_{2}{({\mathrm{C}}_{2}{\mathrm{O}}_{4})}_{3}{({\mathrm{H}}_{2}\mathrm{O})}_{2}$. The magnetic properties were examined by magnetic susceptibility and pulsed high field magnetizatio…
The Exact-Exchange (EXX) Kohn-Sham formalism, which treats exchange interactions exactly within density-functional theory, is applied to one-dimensional periodic systems. The underlying implementation does not rely on specific symmetries of the considered system and can be applied to any kind of periodic structure in…