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Keywords:

  • ionic liquids;
  • microdroplets;
  • organic vapor;
  • porous silicon;
  • sensors
Thumbnail image of graphical abstract

Significantly enhanced vapor condensation and formation of microdroplets occur on porous silicon (pSi) infiltrated with a high amount of ionic liquid. The resonant light reflected from the pSi rugate filter is scattered by the condensed microdroplets. Real-time vapor sensing is achieved by monitoring the decrease in the reflectance peak intensity with a fiber miniature spectrometer.