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. Author manuscript; available in PMC: 2019 Jan 31.
Published in final edited form as: ACS Appl Mater Interfaces. 2018 Jan 16;10(4):3200–3209. doi: 10.1021/acsami.7b09071

Figure 7.

Figure 7

(a) Photoluminescence images of small-pore pSi particles (∼2 mg) dispersed in a microtiter well containing 2 M KOH (200 μL), displayed as a time series. Excitation source was a 365 nm light-emitting diode and images were obtained using a NIR camera fitted with a 600 nm long-pass filter. The porous Si particles were prepared by 35 min oxidation at 700 °C, corresponding to the “medium oxide shell” material of Table 1. (b) Plot of photoluminescence intensity, integrated as a sum of pixel intensities (ImageJ), as a function of time.