Skip to main content
. 2018 May 28;90(12):7181–7189. doi: 10.1021/acs.analchem.7b04682

Figure 1.

Figure 1

Effects of negative holding potentials at carbon-fiber microelectrodes in TRIS buffer. (A) Fast-scan background voltammograms taken with different holding potentials (−0.5, −0.3, −0.1, and 0.0 V vs Ag/AgCl). (B) Amperometric current at various negative potentials over 5 min window at various holding potentials (0.0 to −0.8 V). (C) Slow scan voltammogram (80 mV/s, +0.7 to −1.7 V, forward scan shown only) showing significant redox current in the negative potential region. (D) Subtracted fast-scan voltammograms taken at various application frequencies (0.5–20 Hz), using the voltammograms taken at 30 Hz as the blank signal.