Fig. 1
From: Inexpensive and flexible nanographene-based electrodes for ubiquitous electrocardiogram monitoring
Electrode fabrication and material characterization. a Schematic of the flexible electrode. b Flexible electrode attached to the forearm of a person. c SEM-image of the laser patterned surface (scale bar: 20 μm). The bright areas corresponds to the non-irradiated surface, while the dark ones are that of laser-induced nanographene aggregate. d Raman spectrum of the laser-induced porous nanographene aggregates. e Percentage of change in resistance (R/R0(%)) for a increasing number of bending cycles, being R0 the initial resistance and R the resistance measured after each bending cycle
