论文标题
光引导的表面等离子体气泡通过接触线通过原位沉积等离子纳米颗粒加热来脱钉
Light-Guided Surface Plasmonic Bubble Movement via Contact Line De-Pinning by In-Situ Deposited Plasmonic Nanoparticle Heating
论文作者
论文摘要
Precise spatio-temporal control of surface bubble movement can benefit a wide range of applications like high-throughput drug screening, combinatorial material development, microfluidic logic, colloidal and molecular assembly, etc. In this work, we demonstrate that surface bubbles on a solid surface are directed by a laser to move at high speeds (> 1.8 mm/s), and we elucidate the mechanism to be the de-pinning of the在气泡运动过程中，纳米颗粒（NP）的快速等离激元加热三相接触线（TPCL）。根据我们的观察结果，我们根据不对称的前AFT等离激元加热推断出粘性机制：由于等离激元加热DE细胞而在前TPCL处进行局部蒸发，并扩展了前TPCL，然后扩展了尾随的TPCL，从而恢复了球形气泡形状，以最大程度地减小表面能量。气泡运动过程中的连续TPCL干燥还可以使NP簇沿移动路径的良好定义的接触线沉积。我们的发现对各种微流体和模式写作应用程序有益。
Precise spatio-temporal control of surface bubble movement can benefit a wide range of applications like high-throughput drug screening, combinatorial material development, microfluidic logic, colloidal and molecular assembly, etc. In this work, we demonstrate that surface bubbles on a solid surface are directed by a laser to move at high speeds (> 1.8 mm/s), and we elucidate the mechanism to be the de-pinning of the three-phase contact line (TPCL) by rapid plasmonic heating of nanoparticles (NPs) deposited in-situ during bubble movement. Based on our observations, we deduce a stick-slip mechanism based on asymmetric fore-aft plasmonic heating: local evaporation at the front TPCL due to plasmonic heating de-pins and extends the front TPCL, followed by the advancement of the trailing TPCL to resume a spherical bubble shape to minimize surface energy. The continuous TPCL drying during bubble movement also enables well-defined contact line deposition of NP clusters along the moving path. Our finding is beneficial to various microfluidics and pattern writing applications.
