Electrospun Nanofiber Templating Route

The surfece morphology of a hemitube structure can be controlled by an additional surface treatment process [6,84,93,94]. Choi et al. recently synthesized bumpy metal oxide hemitubes using oxygen plasma-treated polymer nanofibers as a sacrificial template, followed by WO3 sputtering and a subsequent calcination step [94]. The templating nano fibers were prepared using composite nanofibers consisting of 0.5 g of PVP M = 1300 000 g moC ) and 0.5 g of PMMA 

40 min, and (d) morphology modulation caused by an increased Ag deposition thickness of 180nm with an identical Ar plasma treatment time of 40 min. (Reprinted with permission from Ref. [84]. Copyright 2011, American Chemical Society.) 

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