A pH-responsive inorganic membrane has been devised that acts as a gatekeeper for the transport of charged solutes into and out of its interior volume. This behaviour was further used to regulate an enzymatic reaction.
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Keating, C. Gated access to microreactors. Nature Chem 5, 449–451 (2013). https://doi.org/10.1038/nchem.1657
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DOI: https://doi.org/10.1038/nchem.1657
