Fig. 2

PtNP/PEDOT:PSS-modified MEAs. a MEA packaged with the printed circuit board. b Microscopic image of the MEA tip modified with PtNP/PEDOT:PSS. c PtNP/PEDOT:PSS-modified microelectrode surface under scanning electron microscopy (SEM). d SEM image of the PtNPs/PEDOT:PSS nanocomposites