Self-generation of two-dimensional droplet array using oil-water immiscibility and replacement.
Hiroki Yasuga1, Koki Kamiya, Shoji Takeuchi
1School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan. miki@mech.keio.ac.jp.
Lab on a Chip
|March 16, 2018
Summary
Researchers developed a simple method to create 2D microdroplet arrays with concentration gradients for high-throughput biological analysis. This technique simplifies preparation, making advanced diagnostics more accessible.
Area of Science:
- Biotechnology
- Microfluidics
- Analytical Chemistry
Background:
- Two-dimensional (2D) microdroplet arrays are crucial for high-throughput biological and medical analyses.
- Conventional methods for preparing these arrays require precise pipetting or pumping, limiting accessibility.
Purpose of the Study:
- To introduce a simplified method for spontaneously generating 2D-arrayed aqueous droplets.
- To enable the creation of indexed sample concentration gradients within these droplet arrays.
Main Methods:
- Utilizing a well array with interconnected channels for spontaneous droplet generation.
- Employing an immiscible solvent to divide aqueous solutions within the wells.
- Optimizing well dimensions and solvent species for high droplet generation yield.
Main Results:
- Demonstrated the spontaneous generation of 2D droplet arrays using a well array and coarse pipetting.
- Successfully created a 2D droplet array with a two-sample concentration gradient.
- Validated the system's applicability via a cell viability assay for apoptosis induction.
Conclusions:
- The proposed method simplifies and miniaturizes the generation of droplet arrays.
- This technique offers a more accessible approach for high-throughput biological and medical analyses.
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