Materials Literature
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A microfibrous-structured gold catalyst was successfully prepared by gold galvanic deposition on a thin-sheet sinter-locked Cu-fibers. The catalyst has excellent heat transfer ability and enhanced low-temperature activity suitable for gas-phase oxidation of alcohols. The AuCu(alloy)-Cu2O active composites formed durin…
A simple two step solution-based method was applied to fabricate CuO-ZnO heterostructured nanowire (NW) arrays. First, ZnO nanowires were grown on a Si substrate using the ammonia solution hydrothermal reaction. Afterwards, flower-like CuO crystals were photochemically deposited on the tip of the ZnO NWs, using ultrav…
We have synthesized DNA−silver nanoprism conjugates using the thiol−silver interaction and have assembled them into anisotropic structures with distinctive optical properties simply by controlling thermodynamic conditions. The reversible assembly formation takes advantage of the natural anisotropic architecture of the…
We report that the use of a chemically deposited ZnO energy barrier between a CdS quantum dot sensitizer and TiO(2) nanotubes (TNTs) can improve the efficiency of quantum dots-sensitized solar cells (QDSCs). The experimental results show that the formation of the ZnO layers over TNTs significantly improved the perform…
We chemically synthesized inkjet printable polypyrrole (PPy) nanoformulations with reasonable conductivity for the first time in the presence of gemini surfactants 9BA-4-9BA (6,6′-(butane-1,4-diylbis(oxy)) bis(3-nonylbenzenesulfonic acid)) and 9B-4-9B (6,6′-(butane-1,4-diylbis(oxy)) bis(3-nonylbenzenesulfonic sodium))…
Homogenization of metamaterials is a crucial issue as it allows to describe their optical response in terms of effective wave parameters as, e.g., propagation constants. In this paper we consider the possible homogenization of chiral metamaterials. We show that for meta-atoms of a certain size a critical density exist…
We show that the transmission through single and double $\ensuremath{\delta}$-function potential barriers of strength $P=V{W}_{b}/\ensuremath{\hbar}{v}_{F}$ in bilayer graphene is periodic in $P$ with period $\ensuremath{\pi}$. For a certain range of $P$ values we find states that are bound to the potential barrier an…
An easy, inexpensive urea-melt assisted route was designed for the synthesis of ∼10 nm-sized Ni/NiO nanoparticles (NPs). The method consists of the thermal decomposition of a urea-melted medium containing a Ni 2+ -salt and involves the olygomerization and self-combustion of the organic matrix and the formation of the…
An interesting organic−inorganic diblock copolymer, poly(styrene- b -methacrylate grafted with polyhedral oligomeric silsesquioxane) (PS- b -PMAPOSS), with PS (an average degree of polymerization DP of 214) and PMAPOSS ( DP = 27) blocks was prepared: PS 214 - b -PMAPOSS 27 . The morphological structures in nanoscale t…
A bifunctional chelator featuring (DO3A-AM)-Porphyrin units has been prepared. The high-field relaxivity of the Gd complex is similar to those of currently available contrast agents clearly showing that the first coordination sphere remains identical to the parent molecule [Gd(DO3A-AM)(H2O)], with one coordinated wate…
In the context of low cost flexible display device technology, requirements can be fulfilled with accessible multi-colored electrochromic polymers. Here, we report the synthesis and electrochromic properties of two spray processable, ambipolar, fluorescent and multi-color to transmissive electrochromic polymers. Polym…
Abstract We study the effect of the gap size on the molecular orientation and crystalline structure of uniaxially well‐aligned nylon‐6 nanofibers produced in the gap between negatively charged metal plates. The relative intensities of several absorbance bands are found to be different in the parallel‐ and perpendicula…
The electronic band structure and the work function of MgO thin films epitaxially grown on Ag(001) have been investigated using x-ray and ultraviolet photoelectron spectroscopy for various oxide thicknesses. The deposition of thin MgO films on Ag(001) induces a strong diminution in the metal work function. The p-type…
Thin film technology is a powerful exploratory technique in the search for advanced hydrogen-storage systems. Thin films of metal hydrides allow one to perform high-throughput screening of large materials libraries, discover new metastable phases inaccessible by bulk preparation methods, and model the finite-size effe…
An efficient photoelectrode is fabricated by sequentially assembling 2.5 nm and 3.5 nm CdSe quantum dots (QDs) onto a TiO2 film. As revealed by UV-vis absorption spectroscopy, two sizes of CdSe QD can be effectively adsorbed on the TiO2 film. With a broader light absorption range and better coverage of CdSe QDs on the…
Smart materials such as shape memory alloys (SMAs) are recently being used in earthquake engineering applications to control the response of structures. In this paper, a shape-memory alloy damper device made up of austenite wires (e.g. Nickel Titanium wires) is used as a passive energy absorber. NiTi wires are very at…
The synthesis of semiconducting polymer nanospheres (SPNs) by miniemulsion methods has been reported previously,1,2 however the resulting materials have typically been significantly larger than quantum dots, the nanomaterial of choice for cell imaging. In the current work, we aimed to obtain quantum-dot-sized poly(eth…
Studies of the barrier properties of polymer/layered silicate nanocomposites have traditionally focused on systems with low organoclay contents, with very little work comparing theory and experiment over broad composition ranges. As a result, in spite of many reports of promising enhancements in barrier properties, th…
Graphene nanojunctions (GNJs) are important components of future nanodevices and nanocircuits. Using the nonequilibrium Green's function method, we investigate the phononic properties of three-terminal GNJs (TGNJs). The results show that the heat flux runs preferentially along the direction from narrow to wide termina…
We report the synthesis and characterization of two new chiral 1,3-phenylene based five ring bent-core mesogens that combine the unique electro-optic characteristics of banana-shaped molecules with chiroptic properties. Azobenzene moiety incorporated as a linking unit in one of the rigid arms renders trans–cis isomeri…