Wearable sensor can detect dangerous ammonia gas through color and electronics

Ammonia (NH3)—the second-most-produced chemical globally—has proven to be highly important in furthering human civilization over the centuries, both in terms of technological capabilities and innovation potential. It is widely utilized in fertilizers, refrigerants, biomarkers, and next-generation fuel. Unfortunately, NH3 is highly toxic, resulting in complications such as respiratory irritation, chest pain, pulmonary edema, and even death. This makes effective and rapid NH3 sensing and detection capabilities indispensable in industries or environments prone to NH3 leaks.