Facilitating ZnO nanostructure growths by making seeds for self-catalytic reactions
- Mechanical Engineering Department, Texas A and M University, College Station, TX 77843 (United States)
Long and straight single-crystalline ZnO nanowires were successfully synthesized on ZnCl{sub 2}-coated Zn foils in oxygen environment by using simple thermal annealing processes. With relatively low reaction temperatures (410 and 700 Degree-Sign C), nanowires whose lengths and diameters are up to {approx}50 {mu}m and 10-100 nm were obtained. We found that ZnO seeds created from ZnCl{sub 2} played an important role in facilitating the ZnO nanowire growth via self-catalytic reactions. Systematic studies by altering critical synthesis factors that determine shape, length, diameter, and density of the nanowires were performed in order to unveil the growth mechanisms. We also compared the nanowires synthesized from Zn foils with tetrapod ZnO nanostructures synthesized from Zn powders at various temperatures. - Graphical abstract: (Left panel) ZnO seeds from ZnCl{sub 2} after thermal annealing at 500 Degree-Sign C for 5 min, (right panel) dense ZnO nanowires grown from Zn foils with ZnCl{sub 2} coating after thermal annealing at 700 Degree-Sign C for 60 min. Highlights: Black-Right-Pointing-Pointer ZnCl{sub 2} facilitated ZnO nanowire growth by creating ZnO seeds. Black-Right-Pointing-Pointer ZnO nanowires were synthesized via self-catalytic reactions. Black-Right-Pointing-Pointer Long and straight single-crystalline ZnO nanowires were synthesized. Black-Right-Pointing-Pointer Key parameters in thermal annealing processes were identified.
- OSTI ID:
- 22012039
- Journal Information:
- Journal of Solid State Chemistry, Vol. . 187; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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