FIGURE 2.

Local field potential (LFP) traces from a representative tritrode showing the recording of spontaneous cortical slow oscillations in vitro for the three co-localized electrodes of different materials (Au, CNTs and Pt). For this figure, the LFP signals were filtered by applying Notch filters at 50 and 150 Hz and a smoothing filter using 10-ms sliding windows with 5-ms steps. Up states are shown in yellow.