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Issue 18, 2018
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Double-exclusive liquid repellency (double-ELR): an enabling technology for rare phenotype analysis

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Abstract

Double-exclusive liquid repellency (double-ELR) is an extreme wettability phenomenon in which adjacent regions selectively and completely repel immiscible liquids with different surface chemistries on a non-textured substrate (i.e., a substrate in absence of micro/nano-structures). Under double-ELR conditions, each liquid exhibits no physical contact (contact angle of 180°) with its non-preferred surface chemistry, thus enabling complete partitioning of adjacent fluidic volumes (e.g., between water and oil). This enables a new type of cell culture-based assay, where cell loss from common failure modes (e.g., biofouling from inadvertent cell adhesion, detrimental moisture loss/gain, and liquid handling dead volumes) is significantly mitigated. Importantly, the principles of double-ELR were leveraged to achieve underoil sweep patterning, a no-loss, robust and high-throughput distribution of sub-microliter volumes of aqueous media (and cells). In addition to high-efficiency distribution via sweep patterning, double-ELR can be used to construct “modular” (i.e., easily implemented and/or linked together with spatial and temporal control) higher-order architectures for in vitro imitation of physiologically relevant microenvironments that are of particular interest within the cell assay community, including multi-phenotype cultures with excellent spatial and temporal control, three-dimensional layered multi-phenotype cultures, cultures with selective mechanical cues of extracellular matrix (i.e., collagen fiber alignment), and spheroid cultures. Together, these features of double-ELR uniquely facilitate culture and high content analysis of limited cellular samples (e.g., a few hundred to a few thousand cells).

Graphical abstract: Double-exclusive liquid repellency (double-ELR): an enabling technology for rare phenotype analysis

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Publication details

The article was received on 07 Jun 2018, accepted on 23 Jul 2018 and first published on 02 Aug 2018


Article type: Communication
DOI: 10.1039/C8LC00584B
Citation: Lab Chip, 2018,18, 2710-2719
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    Double-exclusive liquid repellency (double-ELR): an enabling technology for rare phenotype analysis

    C. Li, J. Yu, P. Paine, D. S. Juang, S. M. Berry and D. J. Beebe, Lab Chip, 2018, 18, 2710
    DOI: 10.1039/C8LC00584B

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