| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1640947 | Materials Letters | 2016 | 5 Pages |
•ZrO2, HfO2 functionalized porous silicon platforms were fabricated.•FTIR spectroscopy shows ZrO2 and HfO2 covalently bonded to the ox-pSi surface.•MOx-pSi were pH-responsive over multiple pH 2-12 cycles.•MOx-pSi exhibits improved photostability and shelf life under ambient conditions.
We report a high stability pH-responsive sensor based on group IV metal oxide (ZrO2 and HfO2) functionalized porous silicon (pSi). These hybrid metal oxide-pSi (MOx-pSi) materials were tested during repeated pH 2-12 cycling and during continuous UV illumination. The photoluminescence (PL) response proved to be fully reversible unlike uncoated pSi. The MOx-pSi sensor platform was also stable for at least three years.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
