Self-grown mycelium in confined geometries as nanofluidic devices.
basic_science · Level V
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- Record sourced from PubMed, PMID 42140927.
- Also identified by DOI 10.1038/s41467-026-72999-0.
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Abstract
Precise control of ion and molecular transport at the nanoscale underpins next-generation nanofluidic technologies. However, current approaches such as top-down fabrication and bottom-up assembly remain constrained by cost, scalability, or limited programmability. Fungal mycelium-the largest natural ion transport network in soil-offers a living bio-derived route to nanofluidics. Here, we harness mycelium's self-growth and hyphal anastomosis to construct nanofluidic structures that autonomously conform to confined geometries. With interconnected fibrous networks, nanoscale porosity, and negatively charged surfaces (-2.8 to -4.1 mC m<sup>-2</sup>), multispecies mycelium generates in situ adaptive pathways through channels, gaps, and open volumes. Specifically, a mycelium-integrated microchannel achieves a pH-gating switch ratio of up to 3.0 and a 55-fold enrichment for dilute cation detection. These results establish the principle that nanofluidic functionality can be biologically grown rather than fabricated, introducing a scalable, sustainable, and geometrically adaptable platform. By bypassing lithography and energy-intensive processing, this bio-derived strategy may enable living and self-organizing ion transport networks with potential applications in sensing, ionic computing, and energy conversion.