Table 1.
The morphological characteristic and field emission property of ZnO nanorod arrays. (r: the average radius;L: the length of nanorod;β: the field enhance factor;s: the spacing of nanorods)
| Sample | r(nm) | L(μm) | L/r | s(nm) | Turn-on field (V/μm) | Threshold field (V/μm) | β |
|---|---|---|---|---|---|---|---|
| A |
90 ± 2 |
2.5 ± 0.05 |
28 |
195 ± 10 |
6.33 |
8.58 |
1103 |
| B |
125 ± 5 |
4.2 ± 0.05 |
34 |
183 ± 10 |
5.16 |
7.43 |
1772 |
| C |
136 ± 5 |
5.3 ± 0.05 |
39 |
167 ± 10 |
3.83 |
5.65 |
2612 |
| D |
150 ± 5 |
6.3 ± 0.1 |
42 |
143 ± 10 |
4.16 |
6.57 |
2382 |
| E | 168 ± 5 | 7.4 ± 0.1 | 44 | 126 ± 10 | 4.65 | 6.97 | 1760 |