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On hybrid electroosmotic kinetics for field-effect-reconfigurable nanoparticle trapping in a four-terminal spiral microelectrode array
Ren YK; Song CL; Liu WY; Jiang TY; Song JN; Wu QS; Jiang HY
Conference Name2nd International Conference of Microfluidics, Nanofluidics and Lab-on-a-Chip
Conference DateJUN 08-10, 2018
Conference PlaceBeijing, PEOPLES R CHINA
AbstractInduced-charge electroosmosis (ICEO) has attracted tremendous popularity for driving fluid motion from the microfluidic community since the last decade, while less attention has been paid to ICEO-based nanoparticle manipulation. We propose herein a unique concept of hybrid electroosmotic kinetics (HEK) in terms of bi-phase ICEO (BICEO) actuated in a four-terminal spiral electrode array, for effective electrokinetic enrichment of fluorescent polystyrene nanoparticles on ideally polarizable metal strips. First, by alternating the applied AC voltage waves between consecutive discrete terminals, the flow stagnation lines where the sample nanoparticles aggregate can be switched in time between two different distribution modes. Second, we innovatively introduce the idea of AC field-effect flow control on BICEO; by altering the combination of gating voltage sequence, not only the number of circulative particle trapping lines is doubled, but the collecting locations can be flexibly reconfigured as well. Third, hydrodynamic streaming of DC-biased BICEO is tested in our device design, wherein the global linear electroosmosis dominates BICEO contributed from both AC and DC components, resulting in a reduction of particle enrichment area, while with a sharp increase in sample transport speed inside the bulk phase. The flow field associated with HEK is predicted using a linear asymptotic analysis under Debye-Huckel limit, with the simulation results in qualitative agreement with in-lab observations of nanoparticle trapping by exploiting a series of improved ICEO techniques. This work provides an affordable and field-deployable platform for real-time nanoparticle trapping in the context of dilute electrolyte.
KeywordAC field-effect flow control hybrid electroosmotic kinetics induced-charge electrokinetic microfluidics nanoparticle concentration
WOS IDWOS:000461091000017
Funding OrganizationNational Natural Science Foundation of China [11672095, 11702035]; Opening fund of State Key Laboratory of Nonlinear Mechanics; Chang'an University Fundamental Research Funds for the Central Universities [310832171008, 300102328201, 300102328501]; Shaanxi kefa Key Industrial Innovation Chain (group)-Industrial Field [9, 2018ZDCXL-GY-05-04, 2018ZDCXL-GY-05-07-02]; Self-Planned Task of State Key Laboratory of Robotics and System (HIT) [SKLRS201803B]
Indexed ByCPCI-S
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Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Affiliation1.{Ren, Yukun、Song, Chunlei、Jiang, Tianyi、Jiang, Hongyuan} Harbin Inst Technol, State Key Lab Robot & Syst, West Da Zhi St 92, Harbin 150001, Heilongjiang, Peoples R China
2.{Liu, Weiyu、Song, Jingni、Wu, Qisheng} Changan Univ, Sch Elect & Control Engn, Xian, Shaanxi, Peoples R China
3.{Liu, Weiyu、Song, Jingni、Wu, Qisheng} Changan Univ, Sch Highway, Xian, Shaanxi, Peoples R China
4.{Ren, Yukun} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Ren YK,Song CL,Liu WY,et al. On hybrid electroosmotic kinetics for field-effect-reconfigurable nanoparticle trapping in a four-terminal spiral microelectrode array[C]ELECTROPHORESIS,2019:979-992.
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