Heterostructures of ZnO–Zn coaxial nanocables and ZnO nanotubes

Abstract

The heterostructures of Zn-ZnO coaxial nanocables and ZnO nanotubes with an average diameter of 30 nm have been synthesized by simple pyrolysis of zinc acetylacetonate. High-resolution transmission electron microscopy analyses reveal that the Zn core and the ZnO sheath of the nanocables have an epitaxial relationship with their longitudinal axis oriented along the ͗001͘ direction. ZnO nanotubes with a wall thickness of 4 nm possess a single-crystal structure and appear to be the extension of the ZnO sheath of the coaxial nanocables. It is suggested that the ZnO nanotubes are formed by partial evaporation of Zn core of the Zn-ZnO coaxial nanocables.

Effective way to control the size of well-aligned ZnO nanorod arrays with two-step chemical bath deposition

“…In recent years, one-dimensional (1D) nanostructures such as nanotubes [1], nanowires [2], nanorods [3], nanobelts [4], nanocables [5], and nanoribbons [6] have stimulated a considerable interest for scientific research due to their importance in fundamental physics studies and their potential applications in nanoelectronics, nanomechanics and flat panel displays. Among various 1D nanostructural materials, Zinc oxide (ZnO) has generated great interests due to its direct wide band gap of 3.37eV at room temperature, large exciton binding energy of 60meV, and stable physical and chemical properties.…”

Annealing effects on optical properties of low temperature grown ZnO nanorod arrays

“…During the past decade, different one-dimensional ͑1D͒ ZnO nanostructures such as nanotubes, 1 nanowires, 2 nanorods, 3 nanobelts, 4 nanocables, 5 and nanoribbons, 6 have been successfully fabricated by different methods. Among the methods to prepare 1D ZnO nanorods, [7][8][9][10][11][12][13] chemical bath deposition ͑CBD͒ appears to have a huge potential for industrial synthesis due to advantages such as easy operation and low temperature fabrication.…”

Growth behavior and field emission property of ZnO nanowire arrays on Au and Ag films

“…Two strategies have been implemented to control the areal number density of vertically grown ZnO nanowire arrays. The first allows a well-ordered arrangement of the arrays by e-beam lithography, 10 laser interferometry, 11 or nanoimprinting, 12 which are rather costly and difficult to apply to largearea substrates. The second strategy results in random arrangement as in the case of the patterned catalyst method, 13 the layer-by-layer film method, 14 the liquid-phase chemical method, 15 or plasma treatment, 16 which appear to be inexpensive and easily scalable.…”