AI Article Synopsis
- Researchers created nanochannels using two-dimensional materials that exhibit unique fluid transport behaviors based on their crystal structure.
- Black phosphorus was specifically used as the channel surface, revealing significant differences in ion transport along its crystal orientations, with the armchair direction showing a much higher energy barrier than the zigzag direction.
- This anisotropic ion transport highlights the potential for new methods to control fluid movement in nanochannels by manipulating crystal orientation.
Article Abstract
Two-dimensional material nanochannels with molecular-scale confinement can be constructed by Van der Waals assembly and show unexpected fluid transport phenomena. The crystal structure of the channel surface plays a key role in controlling fluid transportation, and many strange properties are explored in these confined channels. Here, we use black phosphorus as the channel surface to enable ion transport along a specific crystal orientation. We observed a significant nonlinear and anisotropic ion transport phenomenon in the black phosphorus nanochannels. Theoretical results revealed an anisotropy of ion transport energy barrier on the black phosphorus surface, with the minimum energy barrier along the armchair direction approximately ten times larger than that along the zigzag direction. This difference in energy barrier affects the electrophoretic and electroosmotic transport of ions in the channel. This anisotropic transport, which depends on the orientation of the crystal, may provide new approaches to controlling the transport of fluids.
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| http://dx.doi.org/10.1021/acs.nanolett.3c00078 | DOI Listing |
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