Fig. 4: Results of the XPS analysis of carbon electrodes in pristine and treated areas.
From: Microplasma direct writing for site-selective surface functionalization of carbon microelectrodes
High-resolution XPS spectra of C1s of a pristine and b plasma direct-writing samples. High-resolution XPS of O1s of c pristine and d plasma-treated samples. e Atomic percentage of C1s and O1s as measured by XPS. f Relative percentage of oxygen-functional groups before and after plasma treatment. Plasma treatment in the graphs was performed at 1-mm distance for 300 repetitions
