Liquid Marbles: A Promising and Versatile Platform for Miniaturized Chemical Reactions.

Lab in a droplet: Rapid condensation reactions between aldehydes and indoles can be performed efficiently with a high-viscosity solvent in liquid marbles since the mixing of the reagents is induced by an external electric field. This strategy complements other stimuli, such as magnetic field and acoustic waves, and thereby opens a new avenue for dual- and multi-component miniaturized chemical reactions.