Novel ZnO nanorod films by chemical solution deposition for planar device applications

Abstract

Smooth and continuous ZnO films consisting of densely packed ZnO nanorods (NRs), which can be used for electronic device fabrication, were synthesized using a hydro-thermo-chemical solution deposition method. Such devices would have the novelty of high performance, benefiting from the inherited unique properties of the nanomaterials, and can be fabricated on these smooth films using a conventional, low cost planar process. Photoluminescence measurements showed that the NR films have much stronger shallow donor to valence band emissions than those from discrete ZnO NRs, and hence have the potential for the development of ZnO light emission diodes and lasers, etc. The NR films have been used to fabricate large area surface acoustic wave devices by conventional photolithography. These demonstrated two well-defined resonant peaks and their potential for large area device applications. The chemical solution deposition method is simple, reproducible, scalable and economic. These NR films are suitable for large scale production on cost-effective substrates and are promising for various fields such as sensing systems, renewable energy and optoelectronic applications.

Deposition Time and Annealing Effects of ZnO Seed Layer on Enhancing Vertical Alignment of Piezoelectric ZnO Nanowires

“…Secondly, HMTA is also suspected to act as a capping agent to promote the anisotropic growth of ZnO in the (002) direction. By preferential attachment to the non-polar facets of the nanowire [35][36][37], HMTA induces steric hindrance effects to prevent the lateral growth of the nanowire.…”

Double Role of HMTA in ZnO Nanorods Grown by Chemical Bath Deposition

“…31,33 In addition, the temperature of the CBD solution heavily affects the growth kinetics. 30,[34][35][36] These effects have to be considered when performing CBD experiments, thus, particular care was taken to immerse the 7 substrates immediately after the solution mixing and to keep the solution temperature fixed at 90 °C through a boiling water bath (bain-marie configuration). Reaction time was varied in the range 0.5-3 hours.…”

Kirkendall void formation and selective directional growth of urchin-like ZnO/Zn microspheres through thermal oxidation in air

“…32,33 Various methods were reported for the synthesis of ZnO nanostructures. These methods include: chemical vapor deposition, 34,35 thermal evaporation, 36,37 wet oxidation, 38,39 solution deposition, 40,41 thermal decomposition, 42,43 hydrothermal methods, 9,44 sol-gel methods 45,46 and thermal oxidation. 32,47 Among the methods mentioned above, thermal oxidation is a simple, cost-effective, catalyst-free, and one-step process for the formation of 1D ZnO nanostructures.…”