Is it feasable to achieve elavation of water to, let's say, 10 m height due to the capillary action effect ? Or the capillary diameter for that to achieve should be less than the water molecules themselves ?
I do not believe that it is pure capillary action, but water does reach the top of 100m tall trees.
The pores of the leaves (where the water evaporates) are indeed so tiny (2-5 nm), that capillary action is strong enough to balance the weight of the sap column below, within which the force is transmitted as tension (negative pressure) in the much thicker xylem-tubes (20000-200000 nm).I do not believe that it is pure capillary action, but water does reach the top of 100m tall trees.
".........venerable question of why sap rises in tall trees . We
hope to address this problem in future work"