Trasobares, S., O. Stephan, C. Colliex, G. Hug, W. K. Hsu, H. W. Kroto and D. R. M. Walton (2001).  "Electron beam puncturing of carbon nanotube containers for release of stored N-2 gas." European Physical Journal B 22(1): 117-122.
 

Description:

A transmission electron micrograph (TEM) shows Carbon Nitride (CNx) nanotubes prepared by catalytic pyrolysis of melamine (a nitrogen rich organic precursor).  These nanotubes present a highly compartmentalized structure with remarkable periodicity structure all along the nanotube. Spatially resolved EELS (spectrum imaging mode) indicates that the nanotubes are made of carbon and nitrogen, inhomogeneously distributed with more carbon on the external surfaces, and more nitrogen in the core.  Under the right conditions, nanocapsules can form inside the nanotube, capturing nitrogen gas in the center of the tube. 

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