Figure 2.

SEM images of PSi. (a) Top view of PSi etching using pulsed current method at a constant peak current density of 10 mA/cm2 with cycle time, Tall, 14 ms and pulse time, Toff, 4 ms and (b) cross section of the pores with estimated length of 7.4 ± 3 μm.

Amran et al. Nanoscale Research Letters 2013 8:35   doi:10.1186/1556-276X-8-35
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