Nondestructive mechanical imaging of carbon nanotubes

Yuegui Zheng; Balasubramanian Sankaran; Robert Geer

doi:10.1117/12.600349

9 May 2005 Nondestructive mechanical imaging of carbon nanotubes

Yuegui Zheng, Balasubramanian Sankaran, Robert Geer

Proceedings Volume 5766, Testing, Reliability, and Application of Micro- and Nano-Material Systems III; (2005) https://doi.org/10.1117/12.600349
Event: Nondestructive Evaluation for Health Monitoring and Diagnostics, 2005, San Diego, CA, United States

Abstract

Differential ultrasonic force microscopy (d-UFM) has been used to investigate the nanoscale mechanical response of multi-walled carbon nanotubes (MWNTs) synthesized via chemical vapor deposition (CVD). In contrast to earlier studies, MWNTs with relatively high numbers (~ 60) of concentric walls were investigated. Quantitative analysis of the MWNT d-UFM data utilized Si3N4 cantilevered tips and Si substrates as a calibration standard. Initial investigations of the CVD MWNTs through d-UFM revealed a surprisingly large radial indentation modulus compared to Si. Frictional force imaging (FFM) was also carried out on the MWNTs in the presence and absence of an ultrasonic vibration. A FFM contrast reversal was observed between the MWNT and the Si substrate as the static set point force of the AFM cantilever was increased. This is attributed to an increase in the local indentation of the MWNT by the Si₃N₄ tip.

Citation Download Citation

Yuegui Zheng, Balasubramanian Sankaran, and Robert Geer "Nondestructive mechanical imaging of carbon nanotubes", Proc. SPIE 5766, Testing, Reliability, and Application of Micro- and Nano-Material Systems III, (9 May 2005); https://doi.org/10.1117/12.600349

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