Geometric tuning of self-propulsion for Janus catalytic particles

摘要: Catalytic swimmers have attracted much attention as alternatives to biological systems for examining collective microscopic dynamics and the response physico-chemical signals. Yet, understanding predicting even most fundamental characteristics of their individual propulsion still raises important challenges. While chemical asymmetry is widely recognized cornerstone catalytic propulsion, different experimental studies reported that particles with identical properties may propel in opposite directions. Here, we show that, beyond its properties, detailed shape a swimmer plays an essential role determining direction motion, demonstrating compatibility classical theoretical framework observations.