Paper-based capacitive sensors for identification and quantification of chemicals at the point of care

Not limited to spectrometric techniques: Dielectric properties of chemicals provide alternative fingerprint information to identify and quantify themselves like spectrometric analyses. Low-cost and label-free paper-based capacitive sensors (PCSs) were developed for chemical identification and quantification by using a handheld multimeter in this study (see picture). Considering paper is ubiquitous and environmentally-friendly, the developed PCS provides a promising tool to monitor environmental health and safety at the point of care.232