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Work function tunability in rGO structures. (a) Calculated work function of carbonyl-rich and hydroxyl-rich rGO structures with different oxygen content; (b) The effect of individual functional groups on the work function of rGO, for two different total oxygen concentrations of 1.5% (for validation purpose) and of 20%. Change in Work function in rGO structures with respect to its functional groups. Reprinted with permission from [118]. Copyright 2013 American Chemical Society.
