Materials Literature
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Abstract Low lattice‐mismatched γ‐LiAlO 2 (100) substrates were employed to grow ZnO epitaxial films by chemical vapor deposition. The influence of growth temperature on growth behavior of ZnO was investigated. Results indicated that the low lattice‐matched (10 $ \bar 1 $ 0) crystallites nucleate on substrate at all g…
The primary mission of the Army is to fight and win the Nation's wars. Conducting offensive and defensive operations has long been the Army's core capability. However, the recent experience of operations in the Balkans, Iraq, and Afghanistan, coupled with today's operational environments, clearly indicates that the fu…
The Ni/SiO2 composite microcapsules were prepared by a one-pot synthesis via thermally decomposing Ni(acac)2·2H2O in 2-pyrrolidone in the presence of tetraethyloxysilane and 3-aminopropyltrimethoxysilane (APS). Transmission electron microscopy and powder X-ray diffraction were used to characterize the general morpholo…
Abstract Aufgerollt wie ein Teppich : Durch Anbringen flexibler Knäuel an den Mittelteil starrer stabförmiger Moleküle entstehen T‐förmige Stab‐Knäuel‐Konstrukte, die selbstorganisierte Schichten aufbauen. Diese Schichten rollen sich auf, sodass im Festkörper, je nach Größe der Knäuel, ausgefüllte Zylinder oder hohle…
A composite film fabricated by plasma treated poly(etherimide) with subsequent deposition of gold nanoparticles and lysine using layer by layer assembly has been demonstrated to be good for cell attachment and proliferation making it an attractive strategy for tissue engineering applications. As compared to the other…
The electronic states of zinc magnesium oxide (Zn 1− x Mg x )O thin films were determined exactly by hard X-ray photoemission spectroscopy (HX-PES) using synchrotron radiation. The Zn 2p core level was shifted to a higher binding energy along with widening of the bandgap by alloying with MgO, whereas the shift of the…
Different chemical states of titanium oxide films were deposited on commercially pure Ti (CP Ti) by electron-beam evaporation at different oxygen flow rates to examine a possibility of their applications to endovascular stents. The surface morphology, chemical composition and crystal structure of the obtained titanium…
A general method for the functionalization of silica surfaces with silicon hydride (Si-H) groups is described for four different preparations of silica. The silica surface is reduced in a two-step chlorination-reduction procedure within a simple gas-flow system at high temperatures. After initial dehydroxylation of th…
Nanostructured porous silicon (PS) is usually formed by anodic etching in HF-based solution, and its porosity is measured by a destructive gravimetric technique. In this article, we report the development of an artificial neural network (ANN)-based model permitting in situ prediction of porosity of PS samples. The sen…
Structure solution from powder diffraction data, from either real- or reciprocal-space methods, has generally been thought to require reliable relative intensities to yield a successful solution. An approach is described here which requires no input of the orientation direction when using simulated annealing. The simp…
The feasibility of a Ni∕YSZ (yttria-stabilized zirconia) anode infiltrated with a perovskite-type proton conductor, (SZY), was investigated for use in solid oxide fuel cells. The electrochemical characteristics of the Ni∕YSZ–SZY anode and the Ni∕YSZ anode were examined for humidified hydrogen fuel and for dry methane…
Abstract The photoluminescence properties of silicon quantum dots may be tailored by surface states via efficient coupling to resonant bulk states. Therefore various wet‐chemistry procedures were developed to fabricate silicon quantum dots with adjustable sizes and surface properties. While the energy gap of the Si co…
The detailed T(c)-sensitive crystal pattern transition from dendrites through fourfold-symmetric structures to faceted crystals of ultrathin poly(ethylene oxide) films has been experimentally observed using atomic force microscopy. The transition has been quantitatively described by the T(c)-dependences of the fractal…
Novel chromophores based on the alternation of electron-poor (pyridyl) and electron-rich (ethylenedioxythienyl) heterocycles were synthesized for the first time and shown to exhibit attractive optical properties in relation with their specific electronic and geometrical (coiled structure) features.
A new heterometallic dyad composed of a zinc porphyrin linked by bisethynyl quaterthiophene to a gold porphyrin was synthesized according to a stepwise modular approach. The latter dyad and the parent reference compounds (porphyrin-ethynylquaterthiophene) were characterized by electrochemistry, spectroelectrochemistry…
Molecular-dynamics simulations of ionically bonded material systems with nonstoichiometric composition, interfaces or surfaces, defects, or other local environments that are substantially different from a stoichiometric bulk require the use of a variable charge interatomic potential. In conventional variable charge mo…
High-resolution transmission electron microscopy (HRTEM) has been used in this work to study the microstructural (structure and microtexture) changes occurring during the high-temperature treatment of the unburned carbon concentrates from coal combustion fly ashes. Emphasis was placed on two aspects: (i) the developme…
A series of new manganese phosphonate clusters with unprecedented topologies, [Mn(20)Na(4)O(12)(t-BuPO(3))(12)(O(2)CMe)(16)(H(2)O)(12)].5H(2)O (), [Mn(15)O(6)(MePO(3))(2)(MeCOO)(18)(H(2)O)(12)][MePO(3)H](2).12H(2)O (), and [Mn(t-BuPO(3)H)(2)(phen)(2)].MeCOOH () have been synthesized and characterized. The core of is c…
The chain dynamics of aqueous suspensions of polyelectrolyte complexes, supported multilayers deposited on submicron silica colloids, and hollow capsules were characterized by wide-line 2 H NMR spectroscopy (DNMR) as a function of layer number, temperature, and ionic strength. The strong polyelectrolytes, poly(diallyl…
Decellularization means and altering crosslinking approaches were two promising alternatives for glutaraldehyde fixation to biological tissues. Bovine jugular veins (BJVs) were decellularized by a multi-step detergent-enzymatic extraction method, then photooxidatively crosslinked. Gross and histological integrity of w…