Interplay of size, deformability, and device layout on cell transport in microfluidics

• Published in: Journal of physics. Condensed matter Vol. 36; no. 42; pp. 425106 - 425123
• Main Authors: Hood, Michael C, Gardner, Karl, Li, Wei, Tan, Jifu
• Format: Journal Article
• Language: English
• Published: England IOP Publishing 23.10.2024
• Subjects: cancer cell detection; cell separation; cell sortation; computational modeling; fluid solid interaction; microfluidic design; cell separation; fluid solid interaction; microfluidic design; computational modeling; cancer cell detection; cell sortation
• ISSN: 0953-8984; 1361-648X; 1361-648X
• DOI: 10.1088/1361-648X/ad5ff3

Microfluidics have been widely used for cell sorting and capture. In this work, numerical simulations of cell transport in microfluidic devices were studied considering cell sizes, deformability, and five different device designs. Among these five designs, deterministic lateral displacement device (DLD) and hyperuniform device (HU) performed better in promoting cell-micropost collision due to the continuously shifted micropost positions as compared with regular grid, staggered, and hexagonal layout designs. However, the grid and the hexagonal layouts showed best in differentiating cells by their size dependent velocity due to the size exclusion effect for cell transport in clear and straight paths in the flow direction. A systematic study of the velocity differentiation under different dimensionless groups was performed showing that the velocity difference is dominated by the micropost separation distance perpendicular to the direction of flow. Microfluidic experiments also confirmed the velocity differentiation results. The study can provide guiding principles for microfluidic design.