Cyclic Buckling Characterization of an Individual MWCNT Using Quantitative In Situ TEM Axial Compression

Raz Samira*, Adam Cohen, Fernando Patolsky, Noa Lachman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Carbon nanotubes (CNTs) are extremely conductive and flexible, making them ideal for applications such as flexible electronics and nanoelectromechanical systems. However, in order to properly apply them in such devices, their long-term durability must be assessed. In the present study, we demonstrate cyclic loading of a thick MWCNT (175 nm) under axial compression, observed in situ under a transmission electron microscope (TEM). The force was applied via controlled displacement, while real-time TEM videos of the deformation process were gathered to produce the morphological data. The in situ observations combined with force–displacement curves revealed the onset of buckling instabilities, and the elastic limits of the tube were assessed. The MWCNT retained its original structure even after 68 loading–unloading cycles, despite observed clues for structural distortions. The stiffness of the tube, calculated after each loading cycle, was in a 0.15 to 0.28 TPa range—comparable to the literature, which further validates the measurement set-up. These in situ tests demonstrate the resilience of CNTs to fatigue which can be correlated with the CNTs’ structure. Such correlations can help tailoring CNTs’ properties to specific applications.

Original languageEnglish
Article number301
JournalNanomaterials
Volume13
Issue number2
DOIs
StatePublished - Jan 2023

Funding

FundersFunder number
National Science Foundation
United States-Israel Binational Science Foundation

    Keywords

    • buckling
    • carbon nanotubes
    • durability
    • in situ deformation
    • nanoindentation
    • nanomechanics
    • transmission electron microscope

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