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Abstract

Marangoni-Propulsion Micro-Robots In article number 2100248, Koki Yoshida and Hiroaki Onoe present Marangoni-propulsion micro-robots integrated with a visible photonic colloidal crystal hydrogel sensor. The micro-robots can autonomously propel at the water-air interface by the Marangoni effect. In addition, the integrated photonic hydrogel sensor achieves dynamic sensing of the external environment and transmits the information by the color change while the micro-robots propel.