Figure 6.

As-anodized rugate filter response to methylamine. Reflectance spectra for an as-anodized PSi rugate filter measured before and after 5-min exposure to 10.7% (volume) of methylamine vapor (a). The change in the reflective peak position plotted as a function of exposure and recovery time (b). The instantaneous blueshift indicates rapid oxidation of the PSi optical filter.

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