Table 1
Immersion time needed for dissolving PSi microcavities in aqueous solutions
Solution	1 M NaOH	1 M KOH
As-anodized PSi	30 s	30 s
UnPSi	<3 min	<3 min
UnTHC	24 h	24 h

Jalkanen et al. Nanoscale Research Letters 2012 7:311   doi:10.1186/1556-276X-7-311