We have demonstrated an electrostatic torsional actuator with vertically aligned carbon nanotube (VACNT) arrays integrated on interdigitated vertical comb structures. The actuator was fabricated on a silicon-on-insulator wafer, and the VACNT arrays were synthesized selectively on conductive stator comb electrodes by thermal chemical vapor deposition process in order to create vertical height difference with respect to rotor comb electrodes. The VACNT-based vertical comb structures successfully induced electrostatic force for out-of-plane torsional motion of rotors. The fabricated devices with integrated VACNT arrays were robust and reliable throughout the long term operation tests up to 4.4 × 10 7 cycles with an optical scan angle of 28.4° at a resonant frequency of 1.537 kHz, verifying the feasibility for practical applications.
Bibliographical noteFunding Information:
This research was supported by the Fusion Research Program for Green Technologies ( 2011-0000005 ) and the Basic Science Research Program ( 2011-0002585 ) ( 313-2008-2-D00084 ) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology .
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering