Nanotech 2010

Characterization of the interfacial binding strength of bundled single-walled carbon nanotubes

C. Ke, M. Zheng, W. Cui, G. Zhou, N. Pugno, R.N. Miles
State University of New York at Binghamton, US

Keywords: carbon nanotube, adhesion, delamination, elastica

Abstract:

We present an in-situ electron microscopy study of adhesion interactions between single-walled carbon nanotubes (SWNTs) by mechanically peeling thin free-standing SWNT bundles using in-situ nanomanipulation techniques inside a high resolution scanning electron microscope. Our in-situ measurements clearly reveal the process of delaminating one SWNT bundle from its originally bound SWNT bundle in a controlled displacement manner and capture the deformation curvature of the delaminated SWNT bundle during the peeling process. A theoretical model based on nonlinear elastica theory is employed to interpret the measured deformation curvatures of SWNTs and to quantitatively evaluate the peeling force and the adhesion strength per unit length between bundled SWNTs. Our in-situ peeling technique provides a potential new venue of separating bundled SWNTs without compromising their material properties. Our results directly contribute to a better understanding of the adhesion interactions between SWNTs and their nonlinear mechanical behaviors in the large displacement regime. ***To Session Organizers: I kindly request this presentation being placed in the special joint session “Characterization of surfaces and interfaces” with the Nanostructured Surfaces and Interfaces Symposium.
 
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