An Optical Olfactory Sensor Based on Porous Silicon Infiltrated with Room‐Temperature Ionic Liquid Arrays

Smell gas with a PSi/IL array! Optical sensor arrays for mimicking the olfactory ability of animals were created by infiltration of an array of ionic liquids (ILs) into the nanochannels of a patterned porous silicon (PSi) rugate filter (see figure). Sensing and recognizing the volatile organic compounds was achieved by monitoring the peak shift of reflectance spectra on each sensing spot followed by principal component analysis. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.