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C31H22N4O2Cl2Cu, orthorhombic, C2221 (no. 20), a = 6.869(2) Å, b = 18.535(7) Å, c = 21.199(7) Å, V = 2698.9(16) Å3, Z = 4, Rgt(F) = 0.0385, wRref(F2) = 0.1036, T = 293 K.

We present a general approach to fabricate metal/TiO2 core/shell nanorod structures by two-step electrodeposition. Firstly, TiO2 nanotubes with uniform wall thickness are prepared in anodic aluminum oxide (AAO) membranes by electrodeposition. The wall thickness of the nanotubes could be easily controlled by modulating the deposition time, and their outer diameter and length are only limited by the channel diameter and the thickness of the AAO membranes, respectively. The nanotubes' tops prepared by this method are open, while the bottoms are connected directly with the Au film at the back of the AAO membranes. Secondly, Pd, Cu, and Fe elements are filled into the TiO2 nanotubes to form core/shell structures. The core/shell nanorods prepared by this two-step process are high density and free-standing, and their length is dependent on the deposition time. [ABSTRACT FROM AUTHOR]

C31H22N4O2Cl2Cu, orthorhombic, C2221 (no. 20), a = 6.869(2) Å, b = 18.535(7) Å, c = 21.199(7) Å, V = 2698.9(16) Å3, Z = 4, Rgt(F) = 0.0385, wRref(F2) = 0.1036, T = 293 K. [ABSTRACT FROM AUTHOR]

The role of transition metal oxides (TMOs) based intermediate connectors in tandem organic light emitting diodes (OLEDs) has been studied via capacitance-voltage and current-voltage characteristics, in order to elucidate the dynamic processes of charges generation and transport within externally applied voltages. The TMO-based intermediate connectors are composed of molybdenum trioxide (MoO 3 ) and cesium azide (CsN 3 )-doped-4, 7–diphenyl-1, 10-phenanthroline (BPhen) layers, where MoO 3 and CsN 3 are used due to low deposition temperatures. From the obtained results of capacitance and current density, charges generation in CsN 3 :BPhen/MoO 3 /NPB is proposed to the defect states in thermally evaporated MoO 3 , which offers a minimal energy offset for charges generation. Moreover, our results clearly indicate that charges generation efficiency is not only relying on the MoO 3 -NPB interface, but also influenced by CsN 3 :BPhen-MoO 3 interface. CsN 3 doped BPhen layer further improves charges separation efficiency, which finally results in favorable charges transport into the adjacent layers and ensure to function efficiently for tandem OLEDs. [ABSTRACT FROM AUTHOR]

This paper reports a high-yield synthesis of Ag nanospheres made up of primary nanoparticles. The size of the silver nanospheres can be controlled by changing the concentration of poly(vinylpyrrolidone) (PVP) which acts as a stabilizer. In addition, the surface morphology of the nanospheres can be well controlled through controlling the shape of primary Ag nanoparticles by introducing a small quantity of ionic capping agents in the solution. Different surface morphologies of Ag nanospheres lead to different surface plasmon resonance (SPR) and surface-enhanced Raman scattering (SERS) properties. The SERS property of the nanospheres used as substrates is very sensitive to the nanoscale characteristics of the surfaces, and the nanospheres with sharp tips on their surface exhibit much better Raman scattering enhancement than non-agglomerated spherical Ag nanoparticles.

In this paper, we report a one-step, high-yield synthesis of one-dimensional Ag heteronanostructures in aqueous solution. Besides the usual fcc phase of Ag, the heteronanostructures also contain a rare hcp (4H polytypic) phase, which favors asymmetrical growth. The rod-needle heteronanostructures (RNHSs) and plate-belt heteronanostructures (PBHSs) are formed through two different mechanisms. For RNHSs, the 4H and fcc phases coexist but have different densities in different segments, while for PBHSs, the fcc and 4H crystal structures exist in plate and belt segments, respectively. Condition-sensitive coexisting phase preferences can be applied as a new way of controlling the shape and thus the properties of Ag nanostructures.