Microfluidic Valves for Selective on-Chip Droplet Splitting at Multiple Sites

被引:20
作者
Agnihotri, Sagar N. [1 ,2 ,3 ]
Raveshi, Mohammad Reza [1 ]
Bhardwaj, Rajneesh [3 ]
Neild, Adrian [1 ]
机构
[1] Monash Univ, Dept Mech & Aerosp Engn, Melbourne, Vic 3800, Australia
[2] Indian Inst Technol, IITB Monash Res Acad, Mumbai 400076, Maharashtra, India
[3] Indian Inst Technol, Dept Mech Engn, Mumbai 400076, Maharashtra, India
关键词
A-CHIP; FLOW; CHANNEL; SYSTEMS; VOLUME;
D O I
10.1021/acs.langmuir.9b03515
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We describe a microfluidic system for control of droplet division at two locations using a T-junction and expansion channel which are placed one after another. Droplets generated at a standard T-junction are introduced into the droplet division section of the microchannel. In the first set of experiments, the droplet division section consists of two consecutive identical T-junctions branching from the main channel. With this geometry, we were able to produce daughter droplets only at the first junction while there was no droplet division at the second junction. Resistive network analysis is used to redesign the microchannel geometry with an expansion channel in place of the second junction, to have the same quantity of flow entering in both the junctions. We observed five different regimes of droplet breakup, namely, (1) no droplet breakup in both junctions, (2) droplet breakup in the first junction, (3) droplet breakup in both junctions with higher daughter droplet volume in the first junction, (4) daughter droplet volume higher in the second junction, and (5) intermittent droplet breakup in both the junctions. Under specific flow conditions, droplet interaction with both the junctions is similar. We then showed design requirements for location of microvalves, simulated by deformation of the main channel wall and by experiments to break the droplet.
引用
收藏
页码:1138 / 1146
页数:9
相关论文
共 36 条
[1]   Production of arrays of chemically distinct nanolitre plugs via repeated splitting in microfluidic devices [J].
Adamson, David N. ;
Mustafi, Debarshi ;
Zhang, John X. J. ;
Zheng, Bo ;
Ismagilov, Rustem F. .
LAB ON A CHIP, 2006, 6 (09) :1178-1186
[2]   Droplet Breakup at the Entrance to a Bypass Channel in a Microfluidic System [J].
Agnihotri, Sagar N. ;
Raveshi, Mohammad Reza ;
Bhardwaj, Rajneesh ;
Neild, Adrian .
PHYSICAL REVIEW APPLIED, 2019, 11 (03)
[3]   Direct Observation of Splitting in Oil-In-Water-In-Oil Emulsion Droplets via a Microchannel Mimicking Membrane Pores [J].
Akamatsu, Kazuki ;
Minezaki, Koki ;
Yamada, Masumi ;
Seki, Minoru ;
Nakao, Shin-ichi .
LANGMUIR, 2017, 33 (49) :14087-14092
[4]   Formation of dispersions using "flow focusing" in microchannels [J].
Anna, SL ;
Bontoux, N ;
Stone, HA .
APPLIED PHYSICS LETTERS, 2003, 82 (03) :364-366
[5]   An optical toolbox for total control of droplet microfluidics [J].
Baroud, Charles N. ;
de Saint Vincent, Matthieu Robert ;
Delville, Jean-Pierre .
LAB ON A CHIP, 2007, 7 (08) :1029-1033
[6]   Dynamics of microfluidic droplets [J].
Baroud, Charles N. ;
Gallaire, Francois ;
Dangla, Remi .
LAB ON A CHIP, 2010, 10 (16) :2032-2045
[7]   Using three-phase flow of immiscible liquids to prevent coalescence of droplets in microfluidic channels: Criteria to identify the third liquid and validation with protein crystallization [J].
Chen, Delai L. ;
Li, ang Li ;
Reyes, Sebastian ;
Adamson, David N. ;
Ismagilov, Rustem F. .
LANGMUIR, 2007, 23 (04) :2255-2260
[8]   An automated two-phase microfluidic system for kinetic analyses and the screening of compound libraries [J].
Clausell-Tormos, Jenifer ;
Griffiths, Andrew D. ;
Merten, Christoph A. .
LAB ON A CHIP, 2010, 10 (10) :1302-1307
[9]   Surface acoustic waves for on-demand production of picoliter droplets and particle encapsulation [J].
Collins, David J. ;
Alan, Tuncay ;
Helmerson, Kristian ;
Neild, Adrian .
LAB ON A CHIP, 2013, 13 (16) :3225-3231
[10]   Isolation of plasma from whole blood using planar microfilters for lab-on-a-chip applications [J].
Crowley, TA ;
Pizziconi, V .
LAB ON A CHIP, 2005, 5 (09) :922-929