Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1645787 | Materials Letters | 2013 | 4 Pages |
ZnO nanorods were synthesized on carbon nanotube (CNT) yarns by an electrochemical deposition method. The grown ZnO shapes varied from a sharp cone-type nanorod to a hexagonal type nanorod according to the increase of counter electrodes. A hexagonal type nanorod changed about 0.3% of its static dimension when it was exposed to an external electric field. From an external pressure with a constant force is applied to the hexagonal type ZnO nanorods, a voltage was generated from 7.5 mV to 10 mV. A cone-type nanorod showed a remarkable field emission whose threshold voltage was as low as 1.5 V/μm. As the results of piezoelectric and field emission tests, the ZnO nanorods on CNT yarn could be a useful material in the applications of a power generator and an emitter.
Graphical abstractDifferent shapes of ZnO nanorods: hexagonal type of ZnO nanorods (a) and their piezoelectric properties (b), corn-type of ZnO nanorods (c) and their field emission results (d).Figure optionsDownload full-size imageDownload as PowerPoint slide