Single-crystalline AlZnO nanomaterials were synthesized through a proposed alloy-evaporation deposition method at the low temperature of 550°C by thermal chemical vapor deposition. Transmission electron microscopy images show that nanowires, or nanowire/nanotube junction structures, can be where Al∕(Al+Zn) atomic ratio is determined to about 2.5 and 12at.%, respectively, energy loss spectrometry. Room-temperature cathodoluminescence measurements nanowires exhibit strong ultraviolet emission,...

Diverse ZnO integrated nanostructures, constructed by epitaxial nanowalls and symmetric single-crystalline nanosheets, were successfully synthesized via a strain-assisted self-catalyzed process at low temperature of 500°C. The nanostructures started with the growth nanowires, nucleated on rugged film mechanism. then formed interconnection nanowires. Finally, nanosheets grown from edges nanowalls. mechanisms supported direct experimental evidence. Room-temperature cathodoluminance spectra...

Abstract The photosensing properties of flexible large‐area nanowire (NW)‐based photosensors are enhanced via in situ Al doping and substrate straining. A method for efficiently making nanodevices incorporating laterally doped NWs is developed the strain‐dependent photoresponse investigated. Photosensors fabricated by directly growing horizontal single‐crystalline Al‐doped ZnO NW arrays across Au microelectrodes patterned on a SiO 2 /steel to enhance transportation carriers junction between...

Although triboelectric nanogenerator (TENG) has been developed as a new green energy source, the dominant charge transfer mechanism regarding surface chemistry not fully uncovered yet, especially in semiconductor materials. Semiconductor materials are technically important only capable of tuning total carrier concentrations available for TENG, but corresponding optoelectronic properties applications into tribo-tronics. However, doping renders one serious drawback tribo-charges tend to leak...

Large-area and crack-free films of CuO nanoneedle arrays were synthesized by heating ZnO coated copper foils at a temperature 400 °C. Scanning electron microscopy shows that the cracking exfoliation are effectively eliminated predeposition layers solution route before processes. In addition, diameters, lengths, area densities nanoneedles tunable varying thickness layers. High-resolution transmission demonstrates single-crystalline structures growing along <31̅0> direction. X-ray diffraction...

This study investigates graded porosity in nanowire arrays to realize a new refractive index mechanism that results unprecedented broadband antireflection and extends the photodetection properties cover entire visible-light range. In this work, ZnO nanowires (NWs) are chosen as model system demonstrate porosity-induced for visible light. Porous NW (PZNA) were synthesized by hydrothermal method followed controlled hydrogen annealing different durations. The surface pores of PZNA formed with...

Single-crystalline conic ZnO nanotubes were synthesized on Si(001) without catalysts by thermal chemical vapour deposition at 475 °C. The grown along the [0001] direction are sharp open-ended tips consisting of planar defects revealed transmission electron microscopy and scanning microscopy. formed self-assembly numerous six-radiated branches hexagram nanosheets. diameters wall thicknesses in ranges 30–100 15–30 nm, respectively. lengths areal densities around 0.5 µm 1–9 × 108 cm−2,...

A low-temperature dry-process was proposed to synthesize silver nanoparticles, nanorods, and nanoplates on TiO2 films via thermal decomposition of nitrate. X-ray diffraction (XRD) shows only crystals were synthesized the substrate without other byproducts remaining. Scanning electron microscopy (SEM) transmission (TEM) reveal Ag nanoparticles are single-crystalline face-centered cubic (FCC) structures their average diameters decrease from 100 15 nm with increase in distance source, which...

The electronic structure of bulk wurtzite ZnO is investigated in valence electron energy loss spectroscopy with scanning transmission microscopy. To qualitatively interpret the characteristic spectral feature ZnO, complex dielectric function derived from corresponding low-loss spectra. By probe across sample toward vacuum, four surface excitations intrinsic to can be identified. plasmon appearing around 16 eV assigned, since decreasing thickness, volume gradually replaced by this feature....