Direct evidence for lip-lip interactions in multi-walled carbon nanotubes
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- Jin, C., Suenaga, K. & Iijima, S. Nano Res. (2008) 1: 434. doi:10.1007/s12274-008-8045-0
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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.