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Electron microscopy of CVD nanotube tips. (a) FE-SEM image of MWNT tubes grown from a Si cantilever/tip assembly. (b) TEM of a CVD MWNT tip. (c) Field emission/SEM image of SWNT bundles grown from a Si cantilever/tip assembly. (d) TEM of several CVD SWNTs comprising a bundle tip.
