Mimicking a gecko's foot with strong adhesive strength based on a spinnable vertically aligned carbon nanotube array

Yanbin Cui, Yang Ju, Baiyao Xu, Peng Wang, Naoki Kojima, Kazuma Ichioka, Atsushi Hosoi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

To mimic gecko foot adhesion, spinnable vertically aligned carbon nanotube (VACNT) arrays, which have a higher density and cleaner surface than ordinary VACNT arrays, were prepared by a normal chemical vapor deposition (CVD) process that is simple and easy to operate for large-scale fabrication, particularly compared with the low-pressure CVD process. The height of the spinnable VACNT array was tuned by varying the reaction time. The shear adhesion strength of the spinnable VACNT array (0.16 cm2) was increased from 21.4 ± 1.7 to 85.8 ± 8.7 N cm-2 when the length of the spinnable VACNT array increased from 35 to 110 μm. Based on the enhanced van der Waals force induced by the large number of contact points on the high-density spinnable VACNT array, the maximum shear adhesion strength of the spinnable VACNT array (0.16 cm2) is 91.8 N cm-2, which is comparable to that of the CNT-based adhesive (∼100 N cm-2) prepared by the low-pressure CVD process. Moreover, a spinnable VACNT array adhesive was prepared over a large area, and a maximum weight of 3.0 Kg was supported successfully by a spinnable VACNT array adhesive with a contact area of 0.96 cm2.

Original languageEnglish
Pages (from-to)9056-9060
Number of pages5
JournalRSC Advances
Volume4
Issue number18
DOIs
Publication statusPublished - 2014 Feb 20
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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