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

被引：24

作者：

Cai, Zheren ^{[1
,2
]}

Huang, Zhandong ^{[3
]}

Li, Zheng ^{[1
]}

Su, Meng ^{[1
]}

Zhao, Zhipeng ^{[1
,2
]}

Qin, Feifei ^{[4
]}

Zhang, Zeying ^{[1
,2
]}

Yang, Jun ^{[3
]}

Song, Yanlin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci ICCAS, Key Lab Green Printing, Inst Chem,Natl Lab Mol Sci BNLMS, Beijing Engn Res Ctr Nanomat Green Printing Techn, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada

[4] ETH Zurich Swiss Fed Inst Technol Zurich, Chair Bldg Phys, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 52期

基金：

中国国家自然科学基金;

关键词：

Marangoni flow; microfluidics; particle manipulation; Stokes flow; vortex; MICROFLUIDICS; SEPARATION; PARTICLES; DRIVEN; MANIPULATION; ADSORPTION; CELLS;

D O I：

10.1002/anie.202008477

中图分类号：

O6 [化学];

学科分类号：

0703 ;

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.

引用

页码：23684 / 23689

页数：6

共 41 条

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