期刊
SOFT MATTER
卷 12, 期 31, 页码 6656-6661出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sm00733c
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资金
- National Science Foundation [IIP-1500261, ECCS-15420819]
- Air Force Office of Scientific Research [FA9550-15-1-0052]
- U.S. Department of Agriculture [2015-67021-22844]
- Camille Dreyfus Teacher-Scholar Awards program
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1500261] Funding Source: National Science Foundation
We experimentally investigate the dynamics of capillary-driven flows at the nanoscale, using an original platform that combines nanoscale pores (similar or equal to 3 nm in diameter) and microfluidic features. In particular, we show that drying involves a fine coupling between thermodynamics and fluid mechanics that can be used to generate precisely controlled nanoflows driven by extreme stresses - up to 100 MPa of tension. We exploit these tunable flows to provide quantitative tests of continuum theories (e.g. Kelvin-Laplace equation and Poiseuille flow) across an unprecedented range and we isolate the breakdown of continuum as a negative slip length of molecular dimension. Our results show a coherent picture across multiple experiments including drying-induced permeation flows, imbibition and poroelastic transients.
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