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Keywords:

  • ammonia;
  • carbon nanotubes;
  • mechanical abrasion;
  • paper;
  • sensors
Thumbnail image of graphical abstract

Pencil it in: Mechanical abrasion of compressed single-walled carbon nanotubes (SWCNTs) on the surface of paper produces sensors capable of detecting NH3 gas at sub-ppm concentrations. This method of fabrication is simple, inexpensive, and entirely solvent-free, and avoids difficulties arising from the inherent instability of many SWCNT dispersions.