The joy of rulebreaking

Just like a water bottle shrinks at the end of a flight as the air pressure increases, most objects get smaller in every direction when pressure is applied equally (hydrostatically) around it. Negative linear compressibility (NLC) is the bizarre phenomenon that involves a structure actually expanding in one direction under the same conditions — in doing so it has to fight against the external pressure. For some time our design approach to engineering NLC has been to focus on materials that show strong and anisotropic negative thermal expansion (NTE). The working assumption here is that two phenomena share the same underlying geometric origin: our (clichéd?) analogy here is that frameworks ca

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Andrew Cairns | Department of Materials, Imperial College London
a.cairns [at] | +44 (0)20 7594 9528