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A photolithographic process was used to integrate the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) with parylene C, yielding highly conformable electrode arrays that were only four micrometers thick (shown here to conform to the midrib of a small leaf). The arrays were sufficiently self-supporting to allow in vivo evaluation in rats, yielding high-quality electrocorticography recordings.
Khodagholy et al. (Tue,) studied this question.