, Volume 1, Issue 5, pp 434-439,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 05 Mar 2010

Direct evidence for lip-lip interactions in multi-walled carbon nanotubes


The stability of open edged multi-walled carbon nanotubes has been investigated by using in situ high resolution transmission electron microscopy at elevated temperatures. Formation of inter-shell structures was experimentally observed for the first time and attributed to a robust interaction between adjacent concentric shells (so-called lip-lip interaction). The fl uctuating behavior of the inter-shell structures suggests a mechanism by which the carbon atoms can pass in or out through the inter-shell edges during carbon nanotube growth or shrinkage processes.