Formation of highly aligned ZnO tubes on sapphire (0001) substrates

Abstract

ZnO tubes were epitaxially grown on sapphire (0001) substrates by metalorganic chemical vapor deposition. The tubes grew along the substrate normal and were characterized by hexagon-shaped cross sections. All of the tubes possessed the same epitaxial relationships with respect to the substrate. Both reactor pressure and growth temperature were found to play an important role in the formation of ZnO tubes. Spiral column growth mode was found to be responsible for the formation of ZnO tubes.

Synthesis and characterization of brush-like ZnO nanorods using albumen as biotemplate

“…Furthermore, ZnO is a material with excellent chemical, thermochemical and mechanical stability, which can be used to absorb ultraviolet light, protecting us against this hazardous radiation. 2 Nanostructured ZnO with as different shapes as one dimensional (1D) nanowires, [3][4][5][6][7] nanotubes, 8,9 nanorods 10 and nanobelts, 11 two dimensional (2D) nanostructures such as nanosheets 12 and nanowalls 13 and some three dimensional (3D) nano/microstructures such as nanoflower and tetrapod like structures, [14][15][16][17] have been fabricated by means of various methods. Thus, the fabrication methods of ZnO nanomaterials can be classified into two categories: (i) vapor phase processes and (ii) solution phase routes.…”

On the formation of well-aligned ZnO nanowall networks by catalyst-free thermal evaporation method

“…ZnO one-dimensional (1-D) nanostructures, including nanowires [1], nanobelts [2], and nanotubes [3], have attracted much attention because of their remarkable physical and chemical properties. The successful synthesis of these diverse nanostructures opens numerous fields of application.…”

A novel zinc(II) macrocycle-based synthesis of pure ZnO nanoparticles

“…ZnO nanoparticles have a wide range of applications such as gas sensors [6], dye-sensitized solar cells [7], ultra violet photodetectors [8], UV lasers [9], photocatalysts [10], piezoelectric transducers [11], and for biomedical applications [12]. They have been synthesized by various methods such as chemical vapor deposition [13], sol-gel method [14], low-temperature wet chemical methods [15], electrochemical deposition [16], laser ablation [17], pulsed laser deposition [18], thermal decomposition [19], spray pyrolysis [20], radiofrequency magnetron sputtering [21], and hydrothermal method [22]. The main purpose of each method is to prevent the crystallite agglomeration, control the particle shape, size, and crystal phase of ZnO nanoparticles.…”