Materials Literature
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Biocomposites were prepared using epoxidized linseed oil and flax fibre reinforcements in different assemblies. Epoxidized linseed oil was cured by two different anhydrides to check how its thermomechanical properties can be influenced. As reinforcements, nonwoven mat, twill weave and quasi-unidirectional textile fabr…
Abstract The transformation mechanisms of thiourea in ethylene glycol solution was systematically investigated in this report, which shows the transformation process is influenced by the anion (NO 3− , Cl − , Br − ) and polyvinylpyrrolidone (PVP). Thiourea (tu) isomerizes into ammonium thiocyanate when NO 3− is presen…
A robust route for the preparation of nanoscopic line patterns from polystyrene-block-poly(ethylene oxide) featuring a photocleavable o-nitrobenzyl ester junction is demonstrated. After mild UV (λ = 365 nm) exposure and selective removal of the PEO microdomains, the polymer trench patterns are used as scaffold to fabr…
This study examines the use of polypyrrole and polypyrrole/multi-walled carbon nanotubes composite coatings for corrosion protection of 304 stainless steel in 3% NaCl solution. Polypyrrole and polypyrrole/multi-walled carbon nanotubes composite coatings were electropolymerised on 304 stainless steel surfaces by the po…
In this study, a series of LaNbTiO6:RE(3+) (RE = Tb, Dy, Ho) down-converting phosphors were synthesized using a modified sol-gel combustion method, and their photoluminescence (PL) properties were investigated as a function of activator concentration and annealing temperature. The resultant particles were characterize…
A series of low molecular weight lanthanide complexes were developed that have high (1)H longitudinal relaxivities (r1) and the potential to be used as dual frequency (1)H and (19)F MR probes. Their behavior was investigated in more detail through relaxometry, pH-potentiometry, luminescence, and multinuclear NMR spect…
Abstract Highly stable and sensitive detection of trace level (approximately 1 ppm) of NH 3 gas at room temperature is demonstrated for single wall carbon nanotube (SWCNT)-based resistive sensor. The sensor device was comprised of two planer Au electrodes deposited on carbon nanotubes (CNTs) by thermal evaporation met…
In this research, phosphate and silicate based ceramic films were synthesized via micro arc oxidation (MAO) method on the surface of the magnesium alloy. With the aim of orthopedic application of these coatings, corrosion behavior of them was investigated by potentiodynamic polarization and electrochemical impedance s…
p-type conduction of CuAlO2 thin films was realized by the rf sputtering method. Combining with Hall, X-ray photoelectron spectroscopy, energy dispersive spectrometer, and X-ray diffraction results, a direct link between the hole concentration, Cu vacancy (VCu), and interstitial oxygen (Oi) was established. It is show…
This work examines the temperature dependence of electron transfer (ET) kinetics in solid-state films of mixed-valent states of monodisperse, small (<2 nm) Au monolayer protected clusters (MPCs). The mixed valent MPC films, coated on interdigitated array electrodes, are Au25(SR)18(0/1-), Au25(SR)18(1+/0), and Au144(SR…
Two dimensional diffuse interface model for a chemically reacting incompressible binary fluid in a bounded domain is considered. The corresponding evolution system consists of the Navier–Stokes equations for the (averaged) fluid velocity that are nonlinearly coupled with a convective Cahn–Hilliard–Oono type equation f…
In this paper, novel electric conductive polylactide/carbon nanotubes (PLA/CNTs) foams were fabricated by a pressure-quench process using supercritical CO2 as a blowing agent. The morphology of PLA/CNTs nanocomposites prepared by solution blending was characterized using SEM and the results indicate that CNTs well dis…
The effect of self-concentration and intermolecular packing on the dynamics of polyisoprene (PI)/polystyrene (PS) blends is examined by extensive atomistic simulations. Direct information on local structure of the blend system allows a quantitative calculation of self- and effective composition terms at various length…
ABSTRACT A series of tensile tests were carried out using hydrogen‐precharged specimens of SAE52100. Two types of tensile specimens were used: (i) smooth specimens and (ii) specimens having various shapes of artificial defects with sizes of about 35–500 µm. In the smooth specimens, fracture origins were non‐metallic i…
Cisplatin is used to treat a variety of tumors, but dose-limiting toxicities or intrinsic and acquired resistance limit its application in many types of cancer including breast. Cisplatin was attached to silica nanoparticles using aminopropyltriethoxy silane as a linker molecule and characterized in terms of size, sha…
Combined scanning tunneling microscopy (STM) and density functional theory (DFT) characterizations of the electronic state were performed on the zigzag edge of oxidized nanographene samples. The oxidized zigzag edge with atomically sharp boundaries was prepared by electrochemical oxidation of the graphite surface in a…
To address the scarcity of polymers that degrade upon absorption of near-infrared (NIR) light, we introduce a new polymer containing moieties in its backbone capable of highly efficient NIR-triggered photocleavage. The polymer rapidly undergoes backbone scission in response to both UV–vis and near-infrared light via t…
A foam sample is assumed to be a set of bubbles embedded into a polymeric matrix with an initial gas overpressure. Silicon foams are produced by a competition between two reactions involving the hydrogenosilane functions carried by the polymer precursor: the first reaction generates gas (initiating cell formation) whi…
Non-mixed-valent reduced polyoxometalates, namely {W18O56XO6} Dawson-like clusters (X=IVII or TeVI) with a localized redox active template have been synthesized and redox properties compared with the pure tungsten control (that is, X=WVI). Upon one-electron reduction, the electron localizes on the main-group element,…
Strong Mid-Infrared Absorption and High Crystallinity of Microstructured Silicon Formed by Femtosecond Laser Irradiation in NF3 Atmosphere, Dong, Xiao, Li, Ning, Liang, Cong, Sun, Haibin, Feng, Guojin, Zhu, Zhen, Shao, Hezhu, Rong, Ximing, Zhao, Li, Zhuang, Jun