Video played 10 times faster than real time after 15 seconds, showing the generation of H2O2 by spraying water onto a peroxide test strip containing organic redox indicator and peroxidase. A blue color change indicates the presence of H2O2 generated from aqueous microdroplets.
Jae Kyoo Lee, Katherine L. Walker, Hyun Soo Han, Jooyoun Kang, Fritz B. Prinz, Robert M. Waymouth, Hong Gil Nam, and Richard N. Zare
PNAS. 2019. 116:19294-19298 DOI: 10.1073/pnas.1911883116