Boubakar Sanogo

Abstract Autonomous droplet oscillations are intriguing and provide a strong inspiration for the development of active soft matter. However, they are often limited by their reliance on external gradients and slow transport. Here, we demonstrate a propulsion mechanism driven by confined interfacial reactions: the hydrogen microbubble elevator.

1 Introduction The urgent global demand for more sustainable and cleaner strategies in functional material fabrication has driven the development of innovative methods that minimize waste, reduce energy consumption, and mitigate environmental impact. Among these, microdroplets serve as a cornerstone in the rational design and emerging functionalities of advanced materials.