期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.106101
关键词
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资金
- National Science Foundation [DMR-0804283]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0804283] Funding Source: National Science Foundation
Mechanical properties of nanoconfined water layers are still poorly understood and continue to create controversy, despite their importance for biology and nanotechnology. We report on dynamic nano-mechanical measurements of water films compressed to a few single molecular layers. We show that the mechanical properties of nanoconfined water layers change significantly with their dynamic state. In particular, we observed a sharp transition from viscous to elastic response even at extremely slow compression rates, indicating that mechanical relaxation times increase dramatically once water is compressed to less than 3-4 molecular layers.
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