Fig. 1: Intrinsic wettability of 2D materials.

a Dependence of the WCA on the number of carbon layers (as determined by ab initio calculation)¹¹. b Calculated and measured WCA as a function of the number of graphene layers (N) on the Cu substrate¹³. c Contact angle data on graphene/Cu for (i) water and (ii) ethylene glycol. All data were taken at the times indicated on the x-axis and are shifted horizontally in the figures for clarity¹⁹. a Reprinted (adapted) with permission from Wu and Aluru¹¹, Copyright (2013) American Chemical Society. b Reproduced with permission from Liu et al.¹³, published by The Royal Society of Chemistry. c Reproduced with permission from ACS (Kozbial et al.)¹⁹. Available at (https://pubs.acs.org/doi/abs/10.1021/la5018328); further permission related to the excerpted material should be directed to the ACS.