Figure 6 | Scientific Reports

Figure 6

From: Simultaneous photoadhesion and photopatterning technique for passivation of flexible neural electrodes based on fluoropolymers

Figure 6

(a) Optical microscopy image of the SU-8 passivated ECoG electrode array and FESEM images of 25 Îĵm, 50 Îĵm and 100 Îĵm electrodes modified with metallic NPs. (b) FESEM image of (i) Au NPs, (ii) Pt NPs, (iii) Au-Pt NPs, iv) IrOx/Au NPs, v) IrOx/Pt NPs, and vi) IrOx/Au-Pt NP-modified electrode. Scale bars denote 1 Îĵm. (c) Cross-sectional TEM images of the Au-FEP interface with respect to plasma treatment time. Scale bar denotes 100 nm. (d) Electrochemical impedance spectroscopic results for the metallic NP- and IrOx/metallic NP-modified electrodes. (e) Cyclic voltammetry (CV) results for IrOx/metallic NP-modified electrodes. (f) Typical voltage transient of the IrOx/Au-Pt NP-modified electrode with an increasing biphasic current pulse amplitude (100 Îĵs duration and 30 Îĵs interpulse delay).

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