论文标题
微观Marangoni冲浪者
Microscale Marangoni Surfers
论文作者
论文摘要
我们应用激光灯来诱导吸附在水油界面上的Janus胶体的不对称加热，并实现主动的微米“ Marangoni Surfers”。温度和表面活性剂浓度梯度的偶联产生了马龙尼胁迫，从而导致自我刺激。粒子速度跨越四个数量级，从微米/s到cm/s，具体取决于激光功率和表面活性剂浓度。实验通过有限元模拟合理化了实验，从而定义了相对于热和溶质马龙尼胁迫分量的大小，定义了不同的推进状态。
We apply laser light to induce the asymmetric heating of Janus colloids adsorbed at water-oil interfaces and realize active micrometric "Marangoni surfers". The coupling of temperature and surfactant concentration gradients generates Marangoni stresses leading to self-propulsion. Particle velocities span four orders of magnitude, from microns/s to cm/s, depending on laser power and surfactant concentration. Experiments are rationalized by finite elements simulations, defining different propulsion regimes relative to the magnitude of the thermal and solutal Marangoni stress components.
