Size effect in ion transport through angstrom-scale slits
University of Manchester · Henry Royce Institute · +3 more institutions
Abstract
In the field of nanofluidics, it has been an ultimate but seemingly distant goal to controllably fabricate capillaries with dimensions approaching the size of small ions and water molecules. We report ion transport through ultimately narrow slits that are fabricated by effectively removing a single atomic plane from a bulk crystal. The atomically flat angstrom-scale slits exhibit little surface charge, allowing elucidation of the role of steric effects. We find that ions with hydrated diameters larger than the slit size can still permeate through, albeit with reduced mobility. The confinement also leads to a notable asymmetry between anions and cations of the same diameter. Our results provide a platform for…
Citation impact
- FWCI
- 19.81
- Percentile
- 100%
- References
- 37
Authors
9- AEAli Esfandiar
University of Manchester
- BRBoya Radha
University of Manchester, Henry Royce Institute
- FWFengchao Wang
University of Science and Technology of China, University of Manchester
- QYQian Yang
University of Manchester, Henry Royce Institute, Southwest Jiaotong University
- SHS. Hu
University of Manchester, Henry Royce Institute
Topics & keywords
- Angstrom
- Ion
- Scale (ratio)
- Ion transporter
- Physics
- Chemistry
- Crystallography
- Clean water and sanitation