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Keywords:

  • adsorption;
  • gas chromatography;
  • nanotubes;
  • polymers;
  • sensors
Thumbnail image of graphical abstract

Sensing in reverse: Reversible detection of as few as 109 molecules (1700 aM) of dimethyl methylphosphonate, a nerve agent simulant, is demonstrated at the end of a micro GC column (see picture). Such arrays form the basis of rapidly transducing molecular sensors with micrometer-sized footprints. The separation capability of the column eliminates the need for selectivity on the sensor, as long as analyte binding is reversible and rapid.