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This is so neat. If authors happen to be around:

* how persistent is the charge? Eg does it eventually reduce to neutral after some amount of drops? Or is the movement dependent on initial drop velocity?

* how mechanically robust is the surface?

* in the “pipette” demo you started with a drop, but that would imply you have to have already measured the droplet - are you able to control the lifting power sufficiently to pull up just the required amount?

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It is! That can be used for so many applications like microfluidics (my research field). I am not one of the authors, but you can see their paper here (https://www.nature.com/articles/s41563-019-0440-2). They have more details there. They modified the surface chemically, “The superamphiphobic surface is made from fluorinated porous silicon dioxide.” You can see some details here (https://www.chemistryworld.com/news/gravity-defying-droplets...), but may need to sign up. If you can’t get that info, let me know.

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