期刊
NANOSCALE
卷 5, 期 7, 页码 2678-2685出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2nr33051b
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- Ministerio de Economia y Competitividad [CSD2010-00024, MAT2009-08650]
- PRESTO, Japan Science and Technology Agency
We develop a bimodal force microscopy method to map the three-dimensional force fields and their time-evolution on a variety of solid-water interfaces. The force maps show an oscillatory decaying force perpendicular to the solid surface with a 0.3 nm periodicity. The technique enables the three-dimensional imaging and mapping of the hydration layers and forces on mica and protein GroEL surfaces with 10 piconewton, 2 angstrom and 40 second (whole volume) resolutions. We record the existence and evolution of nanoscale perturbations involving thousands of water molecules of the protein-liquid interface. Those instabilities are not found in stiff and atomically flat interfaces.
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