Spray-On Colorimetric Sensors for Distinguishing the Presence of Lead Ions

Sprayable stimuli-responsive material coatings represent a new class of detection system which can be quickly implemented to transform surface into color-responsive sensor. In this work, we describe dipicolylamine-terminated diacetylene-containing amphiphile formulation for spray coating on simple paper substrate yield disposable test strips that used detect the presence lead ions in solution. We find response very selective only and sensitivity modulated by altering UV curing time after spraying. Sensitive at least 0.1 mM revealed clear color change from blue red phase. This represents first demonstration spray-on sensor capable