Christophe wrote:Yep ... there's more patience!
It is possible for the manipulation .... but I hadn't manipulated anything at all during the 1st experiment (object of the creation of this subject) ... my error was not to take photos at this time there (not thought ..)
a priori the reason why it seems impossible to me is the following: since the water rises in the wick, it is that at the interface between the pure liquid and the wick, the liquid prefers the wick and therefore rises.
For a drop of pure liquid to form and grow, the opposite is necessary: that the liquid prefers the pure phase to the wick and descends into the drop. There is no reason why it should go up on one side and go down on the other.
In thermodynamics, this is called chemical potential: molecules move from a high chemical potential to a low chemical potential (just as bodies go from high potential energy to low potential energy, just like electric charges ( positive) range from a high electric potential to a low electric potential). This is not necessarily a "spatial" displacement, it is also the case when a chemical reaction occurs. The situation stabilizes when the potential is the same everywhere, and there is no more movement.