Membranes have been prepared with a cracked coating that prevents them from drying out in low-humidity conditions — a boon for devices, such as fuel cells, that need hydrated membranes to function. See Letter p.480
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Kamcev, J., Freeman, B. Cracks help membranes to stay hydrated. Nature 532, 445–446 (2016). https://doi.org/10.1038/532445a
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DOI: https://doi.org/10.1038/532445a