Fig. 2: Electrochemical BQ redox generates reproducible pH transients.
From: Transient colloidal crystals fueled by electrochemical reaction products
a Cyclic voltammogram of a freshly prepared 10 mM BQ solution in 100 mM KCl. b, c Schematic illustrations of (b) the sample cell (cross-section view, not to scale) and (c) the multimode electric potential used for colloidal assembly (not to scale). d Fluorometrically measured pH within ~10 \(\mu m\) of the cathode as a function of time for repeated application of a multimodal electric potential consisting of a \(\varDelta {\varPhi }_{{AC}}=2{V}\), 400 Hz oscillatory potential superimposed with a \(\varDelta {\varPhi }_{{DC}}=\) –200 mV steady potential. Yellow regions indicate when the potential was on and red regions when the potential was off. Source data are provided as a Source Data file.
