Materials Literature
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A simple hydrothermal method has been designed for the selective synthesis of hexagonal DyPO 4 ·1.5H 2 O and tetragonal DyPO 4 nanorods in solution. This study added a new example for selectively controlling different crystal polymorphs of dysprosium orthophosphate nanocrystals through adjusting the temperature and th…
Bicontinuous, thermosensitive, L3-phase silica nanocomposites are prepared by self-assembly of silicified L3-phase silicates and L3-phase silicates integrated with thermoresponsive poly(N-isopropylacryl amide) (PNIPAm; see Figure). In the L3-PNIPAm material, interpenetrating nanoscale networks of silica and polymer ge…
Abstract The major sources of inspiration for this book are the recent rapid advancements in microtechnology and nanotechnology. Microtechnology deals with devices and materials with characteristic lengths in the range of submicron to micron scales (0.1-100 µm), while nanotechnology generally covers the length scale f…
Abstract The collision of carriers may cause both energy and momentum transfer among them. Energy conversion processes must involve energy exchange between at least two different carriers. For example, Joule heating is due to the relaxation of energy from electrons to phonons, and thermal radiation from a solid result…
Two glass samples were prepared according to the molar formula (20% X –40%B 2 O 3 –40%SiO 2 ), where X = CaO or CaF 2 . The glass was melted at 1300°C for 3 h until homogenous glass was obtained. The glass samples were heat-treated at 700°C for 2 h and at 850°C for different times. The green glass obtained has low die…
The efficacy and toxicity of intratumorally (i.t.) administered anticancer drugs mitomycin C (MMC) and doxorubicin (Dox) incorporated in polymeric microspheres were investigated. Biodegradable sulfopropyl dextran microspheres and their oxidized products were used to load Dox and MMC, respectively. EMT6 mouse mammary c…
Submicrometer-scale polypyrrole wires are fabricated in a highly controllable fashion by adjusting the adhesion of polypyrrole to the substrate. This bottom-up method is combined with top-down techniques such as e-beam or tip lithography to produce polypyrrole sensors with desired dimensions (see figure) and can poten…
In 2 O 3 nanowire and carbon nanotube transistors were used to study the chemical gating effect of low-density lipoproteins (LDL). The adsorption of LDL on these two different surfaces was investigated, which revealed a tenfold more LDL particle adsorption on carbon nanotubes than on In2O3 nanowires because of hydroph…
Mesoporous silicon exchanges electrons extensively and reversibly with adsorbed species, e.g., NO2 and NH3. Such an exchange has been reported for systems that maintain their original p or n character. In the present case, a solid, which is a p-type semiconductor in bulk, converts to a “near insulator” when nanostruct…
We report the preparation, characterization, and mechanical properties of DNA/poly(allylamine hydrochloride) (PAH) multilayer microcapsules. The DNA/PAH multilayers were first constructed on a planar support to examine their layer-by-layer buildup. Surface plasmon resonance spectroscopy (SPR) showed a nonlinear growth…
We have used a novel polyelectrolyte multilayer (PEM) coating consisting of the polyelectrolytes collagen and hyaluronic acid. The build-up by the layer-by-layer deposition technique is outlined by ex situ and in situ ellipsometric measurements. When collagen was added, the thickness of the PEM was increased, and the…
Rancieite from Friesach, Carinthia, Austria, is described from an oxidation zone of a small (Mn-bearing) siderite deposit. This mineral is associated with “buserite-(Ca)”, hollandite, braunite, romanechite, todorokite, cryptomelane, pyrolusite, manganite, nsutite, goethite, lepidocrocite, and calcite. Rancieite rarely…
A clean, contact-free method for liquid-crystal alignment using magnetic fields is reported. The method is simple and very robust, with a significantly smaller number of processing steps required than other existing methods. The electro-optical response of these magnetically aligned cells is about ten times faster tha…
[structure: see text] Novel hydrogen-bonded charge-transfer salts of TCNQ with mono- and diprotonated 4,4'-biimidazolium were synthesized in order to demonstrate the high potential of the 4,4'-biimidazole system in a molecular conductor from the viewpoint of crystal engineering and electronic modulation. Crystal struc…
We studied the athermal relaxation of bulk extended chains and the isothermal crystallization in an intermediately relaxed melt by means of dynamic Monte Carlo simulations of lattice−polymer systems. The melt contained a memory of chain orientations but no more crystalline order. We found that the athermal relaxation…
Abstract Three‐dimensional (3‐D) porous hydrogels were fabricated by polymerizing 2‐hydroxyethyl methacrylate around templates of random close‐packed poly(methyl methacrylate) microspheres with nominal diameter of 5 or 15 μm. The templates were leached out to create networks of interconnected spherical pores. Applicat…
A series of double perovskite oxides, Ln(2)NaOsO(6) (Ln = La, Pr, Nd), has been prepared as single crystals from acidic molten NaOH. All three oxides crystallize in the monoclinic space group P2(1)/n (Glazer tilt system #10, a(-)a(-)b(+)), forming a 1:1 ordered rock salt lattice of the Na(+) and Os(5+) cations. Magnet…
The magnetic exchange interactions in a C0(3)(11) moiety encapsulated in Na(17) [(NaOH(2))Co(3)(H(2)O)(P(2)W(15)O(56))(2)] (NaCo(3)) were studied by a combination of magnetic measurements (magnetic susceptibility and low-temperature magnetization), with a detailed Inelastic Neutron Scattering (INS) investigation. The…
The reversible swelling behavior of multilayer films containing hyaluronic acid and polyallylamine hydrochloride was investigated using in situ ellipsometry, since many of the natural functions and applied uses of hyaluronic acid are related to the extraordinary ability of this biopolymer to swell, and to respond conf…
The ligand 2,6-dimethylphenylisocyanide (CNx) forms six complexes of the formula [Re(CO)3(CNx)(L)]+, where L = 1,10-phenanthroline (1), 5-chloro-1,10-phenanthroline (2), 5-nitro-1,10-phenanthroline (3), 5-methyl-1,10-phenanthroline (4), 5,6-dimethyl-1,10-phenanthroline (5), and 1,10-phenanthrolinopyrrole (6). The lowe…