Carbon nanotubes adhesion and nanomechanical behavior from peeling force spectroscopy

TL;DR

This study uses advanced AFM techniques to analyze the adhesion and nanomechanical properties of single-walled carbon nanotubes, providing detailed insights into their contact behavior and mechanical parameters.

Contribution

It introduces a novel AFM-based peeling spectroscopy method to measure adhesion energy and mechanical properties of SWNTs at the nanoscale.

Findings

SWNT contact with surfaces follows a peeling geometry

Quantitative values for adhesion energy, curvature, and bending rigidity are obtained

Provides detailed local shape and mechanical behavior of SWNTs

Abstract

Applications based on Single Walled Carbon Nanotube (SWNT) are good example of the great need to continuously develop metrology methods in the field of nanotechnology. Contact and interface properties are key parameters that determine the efficiency of SWNT functionalized nanomaterials and nanodevices. In this work we have taken advantage of a good control of the SWNT growth processes at an atomic force microscope (AFM) tip apex and the use of a low noise (1E-13 m/rtHz) AFM to investigate the mechanical behavior of a SWNT touching a surface. By simultaneously recording static and dynamic properties of SWNT, we show that the contact corresponds to a peeling geometry, and extract quantities such as adhesion energy per unit length, curvature and bending rigidity of the nanotube. A complete picture of the local shape of the SWNT and its mechanical behavior is provided.