Journal
NANOTECHNOLOGY
Volume 32, Issue 9, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/abcb7c
Keywords
micropillar arrays; triboelectric nanogenerators; non-lithographic; silicon nanowires; CNT; PDMS composites
Funding
- National Nanotechnology Center (NANOTEC), NSTDA, Ministry of Science and Technology, Thailand
- Office of National Higher Education Science Research and Innovation Policy Council (NXPO) [B05F630085]
- Thai Graduated Institute of Science and Technology (TGIST)
- Young Scientist and Technologist Programme (YSTP)
- Academic Melting Pot Project, King Mongkut's Institute of Technology Ladkrabang (2019)
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The performance enhancement of TENGs utilizing CNT/PDMS MP arrays as the triboelectric layer is attributed to increased electrostatic induction and electrification effects. The surface topology of the CNT/PDMS composites is directly influenced by the morphology of the SiNW arrays, with optimized SiNW morphology leading to significant improvement in electrical output.
Carbon nanotube/polydimethylsiloxane composite micropillar (CNT/PDMS MP) arrays were successfully fabricated using non-lithographic silicon nanowire (SiNW) arrays as a template for performance enhancement of triboelectric nanogenerators (TENG). The CNT/PDMS MP arrays were obtained by pouring CNT/PDMS composites on the SiNW arrays and peeled off. Surface topology of CNT/PDMS composites directly depends on morphology of SiNW arrays, which can be varied by the etching time of the typical metal-assisted chemical etching process. The micropatterned CNT/PDMS composites was mostly depicted to the SiNW array template pattern when the morphologies of the SiNW were optimized with a length of approximately 10 mm. Next, the CNT/PDMS MP arrays were utilized as a triboelectric layer of TENGs, generating the maximum output voltage of 22.84 0.85 V, enabling an approximately 18-fold improvement in an electrical output compared to the flat PDMS-based TENG. The performance enhancement of TENGs based on CNT/PDMS MP arrays are attributed to synergic effects of (1) an enhancement of electrostatic induction by CNT composites, increasing dielectric constant, and (2) an enhancement of electrification by surface texturing using non-lithographic pattern and CNT composites.
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