| Autor: |
Li, Da, Zhao, Ai Wu, Wang, Da Peng, Sun, Heng Hui, Liu, Er Hu, Wu, Rong, Zhang, Mao Feng, Guo, Hong Yan, Gao, Qian, Mei, Tao |
| Zdroj: |
Applied Mechanics and Materials; November 2013, Vol. 461 Issue: 1 p381-387, 7p |
| Abstrakt: |
Vertically aligned carbon nanotubes (VACNT) arrays were designed to mimic natural foot-hairs of geckos in order to elucidate the adhesion mechanism. We fabricated and systematically investigated adhesive properties of the VACNT arrays with different top structures. Balancing the gas ratio and pressure used for low pressure chemical vapor deposition (CVD) processing controls the top structures of VACNT arrays which determine the strength of adhesion. Their contact behaviors were observed using a scanning electron microscope (SEM). The VACNT arrays attached the target surface by different contact behavior based on the different top structures. The different contact behavior varied adhesive properties of VACNT arrays. VACNT arrays with free top structure present higher adhesion strength due to the side contact with target surface, which indicated that the top structure is an important factor enabling generation of a strong adhesion. These results present clear implications for the role of top structures in VACNT arrays based synthetic gecko systems, which is important for fabrication of gecko-inspired dry adhesives. |
| Databáze: |
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