Surroundings shape a device, a proton and a reef from within
A device substrate flexed with its film, water asymmetry set a proton's spectrum, and neighbouring reefs kept distinct chemistry under different flows. Three studies measure surroundings as active participants.
Science··Morning
The thin film moved its substrate too
A UC San Diego team applied voltage to a 100-nanometre vanadium dioxide film and watched it and a roughly 10,000-times-thicker substrate with X-ray microscopy. The substrate was not passive: film and substrate pushed, pulled and shared energy. The result held across different materials and setups. It adds mechanics to models treating substrates merely as supports. A three-dimensional neuromorphic chip with layers on both faces remains a proposal, not a demonstrated device.[1]
Local asymmetry formed the proton spectrum
The Nature Chemistry study modelled all 51 coupled vibrational modes of an extended Zundel complex containing six water molecules. Its neural-network calculation reproduced the measured infrared spectrum. Ideal Zundel and Eigen structures were insufficient as fixed poles: as local asymmetry changed in the second water shell, so did the proton's motion and infrared signature. This is a quantum simulation consistent with experiment, not a direct image of a hopping proton.[2]
Two distinct reefs within hundreds of metres
A Woods Hole Oceanographic Institution team sampled two reefs less than 0.4 kilometres apart and a seagrass meadow in the US Virgin Islands over four days. Metabolite and microbial measurements were combined with a water-movement model. Offshore inflow changed Yawzi reef's chemistry and microbiota while the sheltered meadow stayed more stable; each site had a distinct signature. Substrate in a device, water shell around a molecule and coastal current suggest one shared constraint: surroundings can be active parts of observed behaviour.[3], [1], [2]
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