Fig. 3.

(A) Schematic representation of the nucleation process: the critical vapor bubble is able to form two disconnected menisci. (B) Nucleus volume V_c measured from the slope of the logarithmic growth of P_ext as a function of t_ext using Eq. 3 in the three materials at various temperatures. The SBA-15 has a lower extrusion pressure with a smaller slope, leading to a larger uncertainty. The colored rectangles are the theoretical values calculated using nitrogen sorption pore radii and the contact angle derived from the intrusion pressure (Table 1 and SI Text).