Tribological interaction between multi-walled carbon nanotubes and silica surface using lateral force microscopy
Resource
Wear,266(9),952-959.
Journal
Wear
Pages
952-959
Date Issued
2009-04
Date
2009-04
Author(s)
Hsu, J.H.
Chang, S.H.
Abstract
This work presents the tribological interaction between multi-walled carbon nanotubes (MWCNTs) and silica surface using lateral manipulation in the atomic force microscope (AFM). The MWCNT is mechanically manipulated by a pyramidal silicon probe of an AFM using the same scan mechanism as in the imaging mode. With a controlled normal force of the AFM probe, it was found that lateral force applied to the MWCNT could overcome the tribological adhesion between MWCNT and silica surface, causing individual MWCNT to rotate on the silica. According to the results, the shear stresses due to tribological interacting with theMWCNTs and the silica are 59.6MPa and 64.8MPa for theMWCNT 1 (100 nm diameter) and the MWCNT 2 (60nm diameter), respectively. Experimental results show that the shear stress increases with the increasing rotation angle for each manipulation, from which we determine the linear fitting function. In addition, we determine the relationship between push point and pivot point to realize the rotation behavior. The implications of tribological interaction between theMWCNTs and silica surface are discussed in detail. © 2009 Published by Elsevier B.V. All rights reserved.
Type
journal article