SEM images of various nanostructures obtained from sample III. (A) SEM image of the shuttle-like nanostructures. (B) High-resolution SEM image of a shuttle-like nanostructure. (C) SEM image of a solid nanosphere and several shuttle-like nanostructures. (D) SEM image of several nanoshuttles, nanofibers, and irregular species. The aging time is 15 min.
Guo et al. Nanoscale Research Letters 2011 6:529 doi:10.1186/1556-276X-6-529