We employed a 2-electrode system comprised of a pseudo-Ag/AgCl reference (made inhouse) and the CFM working electrode. Fast scan cyclic voltammetry (FSCV) was performed using a custom-built integration unit that includes a Dagan Chem-Clamp (Dagan Corporation, Minneapolis, MN, USA), National Instrument data acquisition cards, Pine Instrument Dagancompatible headstage, and WCCV 3.6 software (Knowmad Technologies LLC, Tucson, AZ, USA). All experiments were performed in a Faraday cage (AutoMate, Berkeley, CA, USA). Electrodes were cycled in each solution for 10 min prior to any data acquisition. A sawhorse waveform was applied at a frequency of 10 Hz for all experiments. More details on the waveform are presented later in Results and Discussion.