Presentation Information
[11p-C310-10]Metaboloid - Relationship with condensation droplet -
〇Masayuki Naya1,2, Shinya Hakuta1, Hideyuki Mitomo3, Kuniharu Ijiro3, Toshiharu Saiki1 (1.Keio University., 2.Naya-Lab., 3.Hokkaido Univ)
Keywords:
Active matters,Robot,non equiliblium
When a mixed solution of ethanol, a volatile liquid with low surface tension, and PEG200, a non-volatile liquid with high surface tension, is confined between a gold-coated glass substrate and an opposing glass substrate containing a sealed vapor region, localized heating by a 532-nm laser spontaneously generates a metabolically active droplet structure referred to as a "Metaboloid" [1,2]. Simultaneously, a paired condensation droplet appears on the opposing substrate due to the condensation of ethanol vapor released from the Metaboloid.In this study, we investigate the formation mechanism of the condensation droplet and its interaction with the Metaboloid. Experimental observations reveal that the condensation droplet is physically distinct from the Metaboloid and follows the motion of the opposing substrate. The droplet is formed by local liquefaction of ethanol vapor near the cooler substrate surface, resulting in a locally supersaturated vapor-carrier field around the condensation site.We discuss how the spatial redistribution of this vapor-carrier field influences the formation, stability, and self-oscillatory behavior of the Metaboloid. The results suggest that the condensation droplet is not merely a by-product of evaporation but an integral component of the coupled vapor-liquid system that governs the dynamic behavior of Metaboloids.