Materials Literature
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The dynamics of a two-level spin system dressed by bichromatic radiation is studied under the conditions of double resonance when the frequency of one (microwave) field is equal to the Larmor frequency of the spin system and the frequency of the other (radio-frequency) field ω_{rf} is close to the Rabi frequency ω_{1}…
The manganocuprate compound Gd3Ba2Mn2Cu2O12 (Gd-3222) has been synthesized by conventional solid state reaction method and its magnetic behavior has been studied by dc and ac magnetization (M) and heat capacity (C) measurements as a function of temperature (T). This compound crystallizes in a tetragonal structure (spa…
To generate entangled photon pairs via quantum dots (QDs), the exciton fine structure splitting (FSS) must be comparable to the exciton homogeneous line width. Yet in the (In,Ga)As/GaAs QD, the intrinsic FSS is about a few tens $μ$eV. To achieve photon entanglement, it is necessary to Cherry-pick a sample with extreme…
The nature of phase separation in Pr(0.5)Sr(0.5)MnO(3) has been probed by linear, as well as nonlinear, magnetic susceptibilities and resistivity measurements across the second order paramagnetic to ferromagnetic transition (T(C)) and first order ferromagnetic to antiferromagnetic transition (T(N)). We found that the…
Abstract The morphological, electrical resistivity (ER), and electromagnetic interference (EMI) shielding effectiveness (SE) properties of poly(propylene) (PP), polystyrene (PS), PP/PS, and PP/PS/styrene–butadiene–styrene (SBS) blends filled with 10 vol.‐% high structure carbon black (CB) were studied. For the CB/PP/P…
Multiwalled carbon nanotubes (MWCNTs) were used as doping material for three-dimensional chitosan scaffolds to develop a highly conductive, porous, and biocompatible composite material. The porous and interconnected structures were formed by the process of thermally induced phase separation followed by freeze-drying a…
Abstract This review describes the recent advances made in the syntheses, structures (including the use of synchrotron sources and variable‐temperature crystal structures and PXRD determinations of unit cell axes), magnetism, and photomagnetism of dinuclear and 1‐D chain spin‐crossover compounds of (primarily) iron(II…
Tm(3+)-Yb(3+) codoped transparent oxyfluoride glass ceramics containing LaF(3) nanocrystals were obtained by thermal treatment on the as-made glasses. The formation of LaF(3) nanocrystals and the incorporation of Tm(3+) and Yb(3+) into LaF(3) nanocrystal lattice were confirmed by X-ray diffraction and high resolution…
Because of a relatively low atomic packing density, (Cg) glasses experience significant densification under high hydrostatic pressure. Poisson's ratio (nu) is correlated to Cg and typically varies from 0.15 for glasses with low Cg such as amorphous silica to 0.38 for close-packed atomic networks such as in bulk metall…
Since the introduction of aspirin in 1899, and more particularly since the advent of antibiotic “wonder drugs” in the 1940s, society has come to rely on the widespread availability of therapeutic drugs at reasonable prices. It was a tremendous challenge to bring penicillin to market and could not have been done withou…
We present an innovative integration process to obtain via interconnects made of one single carbon nanofiber structurally close to multiwall nanotubes. The nanofiber’s growth is obtained thanks to a self-aligned Co based layer which plays the role of catalyst and diffusion barrier at the same time. scanning spreading…
Abstract Electroplated hard chromium (EHC) is widely coated onto parts to provide resistance to corrosion, wear and impact. The electroplating process, however, has significant health and environmental impacts. Air emissions during the electroplating process contain hexavalent chromium (Cr+6) - a known carcinogen, fur…
Abstract Intermediate temperature - solid oxy-fuel cells (IT-SOFCs) include in their design a solid electrolyte layer made of yttria-partially stabilized zirconia (Y-PSZ), an ionic conductor, through which oxygen ions diffuse. This layer needs to fulfill several characteristics among which a low leakage rate correspon…
Abstract NiFe 2– x Cr x O 4 , 0 ≤ x ≤ 1.8, produced from appropriate oxides, has been studied using Mössbauer spectroscopy (MS) at low and ambient temperatures and in external fields up to 7 Tesla. X‐ray diffraction (XRD) shows all samples to be single phase cubic spinels, where a 0 changes with change in x , as a con…
This work involves a comparative study of six different linear methods: three methods based on several curves and three based on a single curve for derivÂing kinetic parameters from TG/DTG curves in the interval related to oil and hydrocarbon generation. Such methods were applied for interpretation of nonisothermal d…
We report results of an extensive study of the structural relaxation occurring in mixed alkali metaphosphate liquids obtained by photon correlation spectroscopy. Values for the glass transition temperature, the fragility index, and the heterogeneity parameter (also known as the Kohlrausch exponent) are extracted from…
The molecular magnet $\text{Hpyr}[{\text{Fe}}_{17}{\text{O}}_{16}{(\text{OH})}_{12}{(\text{py})}_{12}{\text{Br}}_{4}]{\text{Br}}_{4}$ (``${\text{Fe}}_{17}$'') has a well-defined cluster spin ground state of $S=35/2$ at low temperatures and an axial molecular anisotropy of only $D\ensuremath{\simeq}\ensuremath{-}0.02\t…
A study on the effect of alkalisaton using 3% NaOH solution was carried out on Flax, Kenaf, Abaca and Sisal to observe the impact that the common pre-treatment process has on fibre mechanical properties. The result of the investigation indicated that over-treatment of natural fibres using NaOH could have a negative ef…
Abstract Chitosan‐methyl cellulose based films which incorporatate vanillin as an antimicrobial agent and polyethylene glycol 400 (PEG) as a plasticizer were developed in this study. The effects of vanillin and plasticizer concentration on mechanical, barrier, optical, and thermal properties of chitosan‐methyl cellulo…
We explore the frequency characteristics of triple-walled carbon nanotube (TWCNT) oscillators using molecular dynamics simulations. The fast Fourier transform results of the TWCNT oscillators show both primary (f(1)) and minor (f(2)) peaks. The frequency characteristics of TWCNT oscillators are closely related to the…