Fig. 5: In vivo epicortical recording with µECoG array. | npj Flexible Electronics

Fig. 5: In vivo epicortical recording with µECoG array.

From: Hexagonal metal complex based mechanically robust transparent ultrathin gold µECoG for electro-optical neural interfaces

Fig. 5

a Optical images of transparent 500 nm PEDOT:PSS/8 nm Au/(EDTA/PSS) µECoG array (right zoom, scale bar: 100 µm) on mouse brain with a reference electrode: 8 nm Au/EDTA-PSS electrode (left zoom, scale bar: 500 µm). b Optical images of 200 nm thickness of platinum (opaque) µECoG array on mouse brain (scale bar: 100 µm). c Impedance measurement results of various µECoG arrays at 100 Hz and 1000 Hz frequencies after integration with a recording system. d Local field potentials (LFPs) in four representative channels of 500 nm PEDOT:PSS/8 nm Au/(EDTA/PSS) µECoG array after 200 Hz of low-pass filtering. e Time-domain analysis of the short-time Fourier transform and f Power spectral density (PSD) analysis in the frequency domain for each µECoG array recording. g Image of the mouse with the transparent µECoG array implanted 2 weeks after surgery, along with in vivo recordings from the transparent and opaque µECoG arrays. h Root mean square noise of the transparent and opaque µECoG arrays after surgery. i, j PSD analysis of the transparent and opaque µECoG arrays over a period of 2 weeks.

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