Precision ejection of microfluidic droplets into air with a superhydrophobic outlet

Lab on a Chip ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 1484-1491
Author(s):  
Pengfei Zhang ◽  
Kai-Chun Chang ◽  
Adam R. Abate
Keyword(s):  
Microfluidic Devices ◽  
Microfluidic Droplets

We describe a general approach to controllably and precisely eject droplets of tunable composition from microfluidic devices using superhydrophobic patterning.

Review of Microfluidic Devices for On-Chip Chemical Sensing

2016 ◽  
Vol 136 (6) ◽  
pp. 244-249
Author(s):  
Takahiro Watanabe ◽  
Fumihiro Sassa ◽  
Yoshitaka Yoshizumi ◽  
Hiroaki Suzuki
Keyword(s):  
Chemical Sensing ◽  
Microfluidic Devices ◽  
On Chip

Production of O/W Emulsions Containing Astaxanthin by Microfluidic Devices

2020 ◽  
Vol 15 (1) ◽  
pp. 63-68
Author(s):  
Yu. V. Ulianova ◽  
A. M. Popov ◽  
N. P. Babichenko ◽  
K. V. Gorin ◽  
Ya. E. Sergeeva
Keyword(s):  
Microfluidic Devices

scholarly journals A Numerical Study of Sub-Millisecond Integrated Mix-and-Inject Microfluidic Devices for Sample Delivery at Synchrotron and XFELs

2021 ◽  
Vol 11 (8) ◽  
pp. 3404
Author(s):  
Majid Hejazian ◽  
Eugeniu Balaur ◽  
Brian Abbey
Keyword(s):  
Molecular Dynamics ◽  
Flow Rate ◽  
Numerical Study ◽  
Three Dimensional ◽  
Microfluidic Devices ◽  
Liquid Jets ◽  
Mixing Efficiency ◽  
X Ray Diffraction ◽  
Cross Sectional ◽  
Time Required

Microfluidic devices which integrate both rapid mixing and liquid jetting for sample delivery are an emerging solution for studying molecular dynamics via X-ray diffraction. Here we use finite element modelling to investigate the efficiency and time-resolution achievable using microfluidic mixers within the parameter range required for producing stable liquid jets. Three-dimensional simulations, validated by experimental data, are used to determine the velocity and concentration distribution within these devices. The results show that by adopting a serpentine geometry, it is possible to induce chaotic mixing, which effectively reduces the time required to achieve a homogeneous mixture for sample delivery. Further, we investigate the effect of flow rate and the mixer microchannel size on the mixing efficiency and minimum time required for complete mixing of the two solutions whilst maintaining a stable jet. In general, we find that the smaller the cross-sectional area of the mixer microchannel, the shorter the time needed to achieve homogeneous mixing for a given flow rate. The results of these simulations will form the basis for optimised designs enabling the study of molecular dynamics occurring on millisecond timescales using integrated mix-and-inject microfluidic devices.

scholarly journals Production of hydrogel microparticles in microfluidic devices: a review

2021 ◽  
Vol 25 (2) ◽  
Author(s):  
A. Moreira ◽  
J. Carneiro ◽  
J. B. L. M. Campos ◽  
J. M. Miranda
Keyword(s):  
Microfluidic Devices ◽  
Hydrogel Microparticles

scholarly journals Strategy for fast manufacturing of 3D hydrodynamic focusing multilayer microfluidic chips and its application for flow-based synthesis of gold nanoparticles

2021 ◽  
Vol 25 (8) ◽  
Author(s):  
Yanwei Wang ◽  
Michael Seidel
Keyword(s):  
Gold Nanoparticles ◽  
Microfluidic Devices ◽  
Microfluidic Chips ◽  
Proof Of Concept ◽  
Hydrodynamic Focusing ◽  
Pressure Sensitive Adhesive ◽  
Pmma Sheet ◽  
Pressure Sensitive ◽  
Working Device ◽  
Channel Structures

AbstractFabrication of 3D microfluidic devices is normally quite expensive and tedious. A strategy was established to rapidly and effectively produce multilayer 3D microfluidic chips which are made of two layers of poly(methyl methacrylate) (PMMA) sheets and three layers of double-sided pressure sensitive adhesive (PSA) tapes. The channel structures were cut in each layer by cutting plotter before assembly. The structured channels were covered by a PMMA sheet on top and a PMMA carrier which contained threads to connect with tubing. A large variety of PMMA slides and PSA tapes can easily be designed and cut with the help of a cutting plotter. The microfluidic chip was manually assembled by a simple lamination process.The complete fabrication process from device design concept to working device can be completed in minutes without the need of expensive equipment such as laser, thermal lamination, and cleanroom. This rapid frabrication method was applied for design of a 3D hydrodynamic focusing device for synthesis of gold nanoparticles (AuNPs) as proof-of-concept. The fouling of AuNPs was prevented by means of a sheath flow. Different parameters such as flow rate and concentration of reagents were controlled to achieve AuNPs of various sizes. The sheet-based fabrication method offers a possibility to create complex microfluidic devices in a rapid, cheap and easy way.

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