Materials Literature
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The production of nanoparticles (NPs) is increasing rapidly for applications in electronics, chemistry, and biology. This interest is due to the very small size of NPs which provides them with many interesting properties such as rapid diffusion, high specific surface areas, reactivity in liquid or gas phase, and a siz…
Polymer composite films were prepared on the basis of poly(vinyl ethylal) doped with a low concentration of an anionic polymethine dye that absorbs light in the near IR region and a higher concentration of 2,4,5,7-tetranitro-9-fluorenone or tetrakis(benzylamino)octahydrofullerene organic acceptor. The photoconductivit…
Abstract: The Early Tithonian ammonite genus Semiformiceras represents a lineage that lasted almost 3 myr. Previously, a gradual, anagenetic evolutionary pattern has been proposed on the basis of both biostratigraphic data and the interpretation of morphological changes in successive species, subspecies or morphotypes…
The composition of the polyethylene surface upon treatment in an oxygen plasma and its afterglow was studied by attenuated total reflectance IR spectroscopy and X-ray photoelectron spectroscopy. The oxidation of the surface at the lowest destruction rates was attained upon simultaneous action of excited O2(a1Δg) and g…
This paper reports on the development and optical analysis of Tb3+‐doped polyvinyl alcohol (PVA) films. A reference PVA film has also been prepared for which X‐ray diffraction (XRD) spectral profile has been carried out; it was found that this polymer possesses a semi crystalline nature. Spectral analysis of the Tb3+:…
Gamma‐ray irradiations induced various alterations in sulfur‐ and selenium‐based chalcogenide glasses. The absorbed dose was in the range of 0.01–3.6 MGy. The glasses exhibit prominent sensitivity to γ‐ray irradiation, characterized by changes in some of the physical properties of the glasses, e.g., optical transmissi…
The specific heat of Sm 0.55 Sr 0.45 MnO 3 manganite is measured in the vicinity of the ferromagnetic phase transition in strong magnetic fields up to 15 T. An anomalous critical behavior of the Sm 0.55 Sr 0.45 MnO 3 ferromagnet in magnetic field is predicted and experimentally observed. The anomalous behavior manifes…
Instrumented indentation was combined with microscopy and spectroscopy analysis to investigate the local mechanically induced ferroelectric to anti‐ferroelectric phase transformation of niobium‐modified lead zirconate titanate 95/5. Indentation experiments to a depth of 2 μm were performed using a Berkovich pyramidal…
The effect of the processing variables shear rate, solids loading, and sintering temperature on the anisotropy of sintering shrinkage of aqueous tape‐cast alumina was studied. Higher shear rates and higher solids loading resulted in higher in‐plane shrinkage anisotropy, whereas the shrinkage anisotropy in the thicknes…
We develop the monomer, a molecular statics technique for the search of transition states under conditions of relatively complex atomistic environments. As its counterpart from the literature, the dimer, our method is based on forces evaluation alone and is able to find the saddle configuration without previous knowle…
Magnesium imidazolate: trans-diaquabis(imidazole-4-carboxylato-κ 2N,O)-magnesium(II) Mg(C4H3N2O2)2(H2O)2 crystallizes in the monoclinic system (space group P21/c). The structure is composed of monomeric molecules, each containing a Mg(II) ion located at the inversion centre and chelated by two imidazole-4-carboxylate…
The sonochemical reaction rate has been enhanced by the introduction of tiny air bubbles. The bubbles including micrometer-sized ones are produced by method of atomization and are introduced into aqueous luminol solution under 141-kHz sonication in order to investigate the enhancement of sonochemical reaction rate by…
The half-doped manganite, $({\mathrm{Eu}}_{0.4}{\mathrm{La}}_{0.1})({\mathrm{Sr}}_{0.4}{\mathrm{Ca}}_{0.1}){\mathrm{MnO}}_{3}$, has been found to exhibit sharp steplike metamagnetic transitions below $5\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The number of magnetic steps increases with decreasing temperature and this n…
New surface- and size-induced microstructures are found as analytic solutions to a phase field theory of first-order phase transformations. A recently developed exact stability criterion, based on most destabilizing fluctuations, is used to analyze the stability and physical interpretation of each microstructure. Cond…
L-colitose is a 3,6-dideoxysugar found in the O-antigens of some Gram-negative bacteria such as Escherichia coli and in marine bacteria such as Pseudoalteromonas tetraodonis. The focus of this investigation, GDP-4-keto-6-deoxy-D-mannose-3-dehydratase, catalyzes the third step in colitose production, which is the remov…
A binary solution mixture of distinct block copolymer micelles is found to adopt a superlattice. The larger micelles, formed from polystyrene-polyisoprene diblocks, have a nominal radius of 29 nm; the smaller micelles, formed from polystyrene-polydimethylsiloxane diblocks, have a nominal radius of 16 nm. The superlatt…
Fullerene-related carbon nanostructures can be synthesized by an arc-in-liquid system as a cost-effective technique. In this work, we investigated the effects of additional carbon sources from liquid media that were alcohols (C(m)H(2m+1)OH, m = 1-8), alkanes (C(m)H(2m+2), m = 6-7), and aromatic compounds (C6H6-C(n)H(2…
The pyroelectric properties of (1− x )Pb(Mg 1/3 Nb 2/3 )O 3− x PbTiO 3 (PMN− x PT) single crystals with various compositions and orientations have been investigated using a dynamic method. Excellent pyroelectric performances can be achieved in 〈111〉‐oriented rhombohedral PMN− x PT (0.24≤ x ≤0.30) crystals, where the m…
Lanthanum‐containing perovskites, LaMO 3 (M=Al, Sc, Cr, Mn, Fe, Co, Ni, Ga, and In), have been synthesized in molten carbonates from a mixture of lanthanum carbonate and an M‐containing oxide or an acetate, or from a co‐precipitation mixture of metal (M) and lanthanum. Metal aluminum, chromium, and iron, immersed in a…
Cd-doped alpha-MnS nanowires (av diam = 70 nm) were synthesized by the chemical vapor deposition of MnCl(2)/CdS powders. They all consisted of single-crystalline rock-salt MnS structures with the [111] growth direction. The X-ray diffraction pattern analysis indicates that 10% Cd doping would expand the lattice consta…