Figure 1.

SEM images of as-synthesized NWs at vacuum pressures of (a) 6, (b) 9, (c) 12, and (d) 15 Torr. The temperature was fixed at 400°C, reaction time was 30 min, and carrier gas flow rate was held at 30 sccm.

Chiu et al. Nanoscale Research Letters 2013 8:290   doi:10.1186/1556-276X-8-290
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