Solubility-Dependent NiMoO Nanoarchitectures: Direct Correlation between Rationally Designed Structure and Electrochemical Pseudokinetics.

Tailoring the binary metal oxide along with developing new synthetic methods for controlling resultant nanostructures in a predictive way is an essential requirement for achieving the further improved electrochemical performance of pseudocapacitors. Here, through a rational design of the supersaturation-mediated driving force for hydrothermal nucleation and crystal growth, we successfully obtain one-dimensional (1-D) nickel molybdenum oxide (NiMoO) nanostructures with controlled aspect ratios. The morphology of the 1-D NiMoO nanostructures can be tuned from a low to a high aspect ratio (over a range of diameter sizes from 80 to 800 nm).

Structural and Luminescence Features of Lithium-Doped p-Type Film-Like ZnO Nanorods.

We report the structural and optical characteristics of p-type lithium (Li)-doped ZnO film-like nano-structures prepared by utilizing a simple hydro-thermal method in an aqueous solution at a low temperature (< 90 degrees C). The diameters and densities of the Li-doped ZnO nanostructures were controlled by adjusting the molar concentration. A relatively high molar concentration resulted in hexagonal and flat surface-shaped ZnO nanostructures.

Enhanced performance of triboelectric nanogenerators integrated with ZnO nanowires.

We report a hybrid nanogenerator matrix integrated with ZnO nanowires (NWs) for the use of combined triboelectric and piezoelectric features, where the ZnO NWs are grown on bottom electrodes via a hydrothermal method. Along with structural properties analyzed by scanning electron microscopy, the hybrid nanogenerator displayed an output power density of 0.21 mW/cm2, which was higher than that of the triboelectric nanogenerator without NWs.

Solution-processed Ag-doped ZnO nanowires grown on flexible polyester for nanogenerator applications.

The integration of ZnO nanowire-based energy harvesting devices into flexible polyesters or clothes would have a significant effect on the energy harvesting building block for harvesting the mechanical energy from human motions. Moreover, the demonstration of high output power via a doping process opens an important method for enhancing the output power. Here, we report solution-based synthesis of Ag-doped ZnO nanowires on flexible polyester substrates without using any high temperature annealing processes.

Structural analysis of vertically-aligned single crystalline ZnO nanorods grown on different seed layers with chemical solution deposition.

We report the structural properties of the vertically-oriented ZnO nanorods fabricated on various ZnO seed layers with chemical solution deposition (CSD) technique. The ZnO nanorods were prepared using an aqueous solution with Zinc nitrate (Zn(NO3)2 x 6H2O, Aldrich) and hexamethylenetetramine (HMT, Aldrich) in a convection oven. A-plane sapphire substrates with a deposited ZnO thin film were placed upside down in a quartz holder to avoid any micro-crystalline contamination.