Abstract

Single-crystal Cu nanorods have been fabricated on carbon films by manipulating electronbeam irradiation on a Cu powder charge in a transmission electron microscope (TEM). Byadjusting the intensity of the electron beam, we observed lively nucleation andgrowth of the Cu nanorods with the TEM. Individual Cu nanorods are straightwith diameters ranging from 40 to 50 nm. The length of the rods is controlled bye-beam irradiation duration, and can be extended to . Selective area electron diffraction showed that the sidewalls of the Cu nanorods wereassociated with the (110) planes, while facets on the tips were associated with the (111)planes. We believe that the growth process is mainly controlled by high surfacemobility of Cu atoms on the C surface, and surface diffusion of the Cu atomsfrom high surface energy planes to low surface energy planes of the Cu nanorods.

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