CUED Publications database

Influence of packing density and surface roughness of vertically-aligned carbon nanotubes on adhesive properties of gecko-inspired mimetics.

Chen, B and Zhong, G and Oppenheimer, PG and Zhang, C and Tornatzky, H and Esconjauregui, S and Hofmann, S and Robertson, J (2015) Influence of packing density and surface roughness of vertically-aligned carbon nanotubes on adhesive properties of gecko-inspired mimetics. ACS Appl Mater Interfaces, 7. pp. 3626-3632.

Full text not available from this repository.

Abstract

We have systematically studied the macroscopic adhesive properties of vertically aligned nanotube arrays with various packing density and roughness. Using a tensile setup in shear and normal adhesion, we find that there exists a maximum packing density for nanotube arrays to have adhesive properties. Too highly packed tubes do not offer intertube space for tube bending and side-wall contact to surfaces, thus exhibiting no adhesive properties. Likewise, we also show that the surface roughness of the arrays strongly influences the adhesion properties and the reusability of the tubes. Increasing the surface roughness of the array strengthens the adhesion in the normal direction, but weakens it in the shear direction. Altogether, these results allow progress toward mimicking the gecko's vertical mobility.

Item Type: Article
Uncontrolled Keywords: area density carbon nanotube forests dry adhesive normal adhesion packing density roughness shear adhesion Adhesiveness Adhesives Animals Biomimetic Materials Biomimetics Lizards Nanotubes, Carbon
Subjects: UNSPECIFIED
Divisions: Div B > Electronic Devices & Materials
Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:32
Last Modified: 19 Sep 2017 01:30
DOI: