A generic approach for preparing core–shell carbon–metal oxide nanofibers: morphological evolution and its mechanism

Abstract

Carbon–SnO₂ core–shell hybrid nanofibers were prepared via single-spinneret electrospinning and subsequent heat treatment. The Kirkendall effect during the heat treatment is found to be responsible for the formation of core–shell morphology. The route is proven to be generic for fabrication of carbon–metal oxide or carbon–metal core–shell nanofibers, and corresponding nanotubes.