Figure 3.

Laser-scribed patterning and reduction of GO thin films formed on PP substrate to fabricate rGO-GO-rGO stripes with a controlled mode of operation. (a) Direct laser exposure on GO-PP substrate. (b) Indirect laser exposure on GO film through PP barrier. The inset drawings in figure (a,b) illustrates the surface position of GO film and PP substrate against the laser exposure. (c,d) Optical micrographs showing the patterned rGO-GO-rGO stripes operated by direct and indirect laser exposure (dark lines: laser-scribed rGO, bright line: unscribed pristine GO). (e,f) Typical I-V characteristics of the samples scribed by direct and indirect laser operations.