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

Abstract

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

Chemosensors for Ion Detection

“…sensory research. P. Shiveshwarkar et al delivered the spray coating tactic for stimuli responsive materials for the colorimetric detection of Pb 2+ [16], in which dipicolylamineterminated diacetylene-containing amphiphiles were spray-coated for detecting the Pb 2+ . L. Prabakaran and co-workers discussed the use of green synthesized Ag NPs towards the detection of triethylamine and also demonstrated the antibacterial and anticancer activities of the NPs [17].…”