Physical amplification in colorimetric sensing

摘要

Rapid and sensitive detection of hazardous chemicals is essential for worker safety in industrialenvironments and for soldier safety in the field. In this work, we propose a physical coloration platform topassively amplify existing colorimetric sensing mechanisms. We outline a design process which can betargeted to an arbitrary colorimetric indicator and target and fabricate as a demonstration a sensor whichproduces noticeable color change on reaction with ammonia in the vapor phase.