Figure 7.

Aqueous stability. Reflectance spectra measured for freshly prepared UnPSi and UnTHC microcavities, and spectra measured after immersion in 1 M aqueous NaOH (a) and KOH (b). The UnPSi microcavities show clear dissolution after 1-min immersion, whereas the spectra measured for UnTHCPSi microcavities show only minor changes after 1- and 2-h immersion.