Magnetic Actuation Multifunctional Platform Combining Microdroplets Delivery and Stirring.,ACS Applied Materials & Interfaces

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Magnetic Actuation Multifunctional Platform Combining Microdroplets Delivery and Stirring.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-12-09 , DOI: 10.1021/acsami.9b18957
He Liu ₁ , Shuang Zheng ₂ , Xuan Yang ₁ , Wenbo Liao ₁ , Can Wang ₃ , Weining Miao ₃ , Jiayue Tang ₁ , Dianyu Wang ₁ , Ye Tian ₃

Affiliation

Multifunctional droplets manipulation devices are in urgent need for various laboratory operations such as chemical reaction and biological analysis. However, most current techniques that achieved a controllable droplet transport system mainly rely on passive diffusion for mixing, limiting their practical applications. Here, we develop a magnetic controlled dimple on slippery surface (MCDSS) that enables arbitrary direction or even uphill droplet transport through the synergy between gravitational force and asymmetrical droplet deformation. Further experiments demonstrate that our system could also be used for stirring microdroplets and accelerating the mixing speed by more than one hundred times. In addition, the microstir strategy could help to avoid locally uneven production of precipitation or gas in heterogeneous reactions. This combination of droplet delivery and agitation may have a promising future for application in various fields, for example, laboratory-on-a-chip platforms and microengines.

中文翻译：

结合微滴输送和搅拌的电磁驱动多功能平台。

多功能液滴操纵装置迫切需要各种实验室操作，例如化学反应和生物学分析。但是，目前大多数实现可控液滴传输系统的技术主要依靠被动扩散进行混合，从而限制了其实际应用。在这里，我们开发了在光滑表面（MCDSS）上的磁控凹坑，该凹坑通过重力与不对称液滴变形之间的协同作用，能够实现任意方向甚至上坡的液滴运输。进一步的实验表明，我们的系统还可用于搅拌微滴并将混合速度提高一百倍以上。另外，微搅拌策略可以帮助避免在异质反应中局部产生不均匀的沉淀或气体。

更新日期：2019-12-11

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