AN ANALYSIS OF ELECTRON-DIFFRACTION PATTERNS OF THIN VAPOR-GROWN CARBON FILAMENTS

The electron diffraction patterns of carbon filaments with hollow cores and external diameters of the order of 10 nm have been analysed to obtain information about their structure. These filaments were grown by catalytic decomposition on iron particles of hydrocarbon-hydrogen mixtures at about 1100-degrees-C. The unusually thin walls of these filaments resulted in considerable detail along the equatorial lines of their diffraction patterns, and this detail has been closely reproduced by a theoretical model.