期刊
NATURE
卷 553, 期 7686, 页码 68-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nature25008
关键词
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资金
- Army Research Office [W911NF-16-1-0289, W911NF-16-1-0042]
- National Science Foundation [DMR-1609898, DMR-1610215]
- Defense Advanced Research Projects Agency [D15AP00111]
- Office of Naval Research [N00014-16-1-2442, N00014-12-1040]
- Air Force Office of Scientific Research [FA9550-16-1-0159, FA9550-14-10389]
- US Department of Energy (DOE), the Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- US DOE Office of Science User Facility [DE-AC02-06CH11357]
- Office of Science of the US DOE [DE-AC02-06CH11357, DE-AC02-05CH11231]
- University of Massachusetts-Amherst
- Canada Foundation for Innovation
- Natural Sciences and Engineering Research Council of Canada
- University of Saskatchewan
- Government of Saskatchewan
- Western Economic Diversification Canada
- National Research Council Canada
- Canadian Institutes of Health Research
- Direct For Mathematical & Physical Scien [1609898] Funding Source: National Science Foundation
Designing materials to function in harsh environments, such as conductive aqueous media, is a problem of broad interest to a range of technologies, including energy, ocean monitoring and biological applications(1-4). The main challenge is to retain the stability and morphology of the material as it interacts dynamically with the surrounding environment. Materials that respond to mild stimuli through collective phase transitions and amplify signals could open up new avenues for sensing. Here we present the discovery of an electric-field-driven, water-mediated reversible phase change in a perovskite-structured nickelate, SmNiO35-7. This prototypical strongly correlated quantum material is stable in salt water, does not corrode, and allows exchange of protons with the surrounding water at ambient temperature, with the concurrent modification in electrical resistance and optical properties being capable of multi-modal readout. Besides operating both as thermistors and pH sensors, devices made of this material can detect sub-volt electric potentials in salt water. We postulate that such devices could be used in oceanic environments for monitoring electrical signals from various maritime vessels and sea creatures.
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