Evaporation Induced Spontaneous Micro-Vortexes through Engineering of the Marangoni Flow

Zheren Cai, Zhandong Huang, Zheng Li, Meng Su, Zhipeng Zhao, Feifei Qin, Zeying Zhang, Jun Yang, Yanlin Song

科研成果: 期刊稿件文章同行评审

26 引用 (Scopus)

摘要

Vortex flow fields are widely used to manipulate objects at the microscale in microfluidics. Previous approaches to produce the vortex flow field mainly focused on inertia flows. It remains a challenge to create vortexes in Stokes flow regime. Here we reported an evaporation induced spontaneous vortex flow system in Stokes flow regime by engineering Marangoni flow in a micro-structured microfluidic chip. The Marangoni flow is created by nonuniform evaporation of surfactant solution. Various vortexes are constructed by folding the air–water interface via microstructures. Patterns of vortexes are programmable by designing the geometry of the microstructures and are predictable using numerical simulations. Moreover, rotation of micro-objects and enrichment of micro-particles using vortex flow is demonstrated. This approach to create vortexes will provide a promising platform for various microfluidic applications such as biological analysis, chemical synthesis, and nanomaterial assembly.

源语言英语
页(从-至)23684-23689
页数6
期刊Angewandte Chemie - International Edition
59
52
DOI
出版状态已出版 - 21 12月 2020
已对外发布

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