Journal article

New flow control systems in capillarics: off valves

Julian Menges, Claude Meffan, Fabian Dolamore, Conan Fee, Renwick Dobson, Volker Nock

Lab on a Chip | ROYAL SOC CHEMISTRY | Published : 2021


Capillary systems are a promising technology for point-of-care microfluidics, since they are pre-programmable and self-powered. This work introduces "off valves" as a key building block for capillaric circuits, providing easy-to-use, multi-purpose valving functionality and autonomous flow control. To this end we present a set of switching valve designs that use trigger channels and liquid input alone to close or open connections between channels in a highly controllable fashion. The key element of all these valve designs is a new off trigger valve, which is characterised in detail here and holds the potential for transistor-like switching and resistance tuning. As an example for the potentia..

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Awarded by MBIE

Funding Acknowledgements

The authors would like to thank Helen Devereux and Gary Turner of the Nanofabrication Laboratory at the University of Canterbury for technical support, and Dr Ayelen Tayagui for confocal laser scanning microscopy measurements. Funding was provided by MBIE Grant UOCX1706.