Figure 2.

SEM images of various nanostructures obtained from sample I. (A) SEM image of the irregular nanoarchitectures accompanied by several shuttle-like nanostructures. (B) High-resolution SEM image of the shuttle-like nanostructures. (C) SEM image of a hollow nanosphere. (D) SEM image of a nanotube. The aging time is 15 min.

Guo et al. Nanoscale Research Letters 2011 6:529   doi:10.1186/1556-276X-6-529
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