Journal papers
Michael L. Whittaker; David Ren; Colin Ophus; Yugang Zhang; Laura Waller; Benjamin Gilbert; Jillian F. Banfield
Ion complexation waves emerge at the curved interfaces of layered minerals Journal Article
In: Nature Communications volume , vol. 13, iss. 1, 2022.
Abstract | Links | BibTeX | Tags: tomography
@article{Ion2022,
title = {Ion complexation waves emerge at the curved interfaces of layered minerals},
author = {Michael L. Whittaker and David Ren and Colin Ophus and Yugang Zhang and Laura Waller and Benjamin Gilbert and Jillian F. Banfield },
doi = {https://doi.org/10.1038/s41467-022-31004-0},
year = {2022},
date = {2022-06-13},
urldate = {2022-06-13},
journal = {Nature Communications volume },
volume = {13},
issue = {1},
abstract = {Visualizing hydrated interfaces is of widespread interest across the physical sciences and is a particularly acute need for layered minerals, whose properties are governed by the structure of the electric double layer (EDL) where mineral and solution meet. Here, we show that cryo electron microscopy and tomography enable direct imaging of the EDL at montmorillonite interfaces in monovalent electrolytes with ångstrom resolution over micron length scales. A learning-based multiple-scattering reconstruction method for cryo electron tomography reveals ions bound asymmetrically on opposite sides of curved, exfoliated layers. We observe conserved ion-density asymmetry across stacks of interacting layers in cryo electron microscopy that is associated with configurations of inner- and outer-sphere ion-water-mineral complexes that we term complexation waves. Coherent X-ray scattering confirms that complexation waves propagate at room-temperature via a competition between ion dehydration and charge interactions that are coupled across opposing sides of a layer, driving dynamic transitions between stacked and aggregated states via layer exfoliation.},
keywords = {tomography},
pubstate = {published},
tppubtype = {article}
}
Visualizing hydrated interfaces is of widespread interest across the physical sciences and is a particularly acute need for layered minerals, whose properties are governed by the structure of the electric double layer (EDL) where mineral and solution meet. Here, we show that cryo electron microscopy and tomography enable direct imaging of the EDL at montmorillonite interfaces in monovalent electrolytes with ångstrom resolution over micron length scales. A learning-based multiple-scattering reconstruction method for cryo electron tomography reveals ions bound asymmetrically on opposite sides of curved, exfoliated layers. We observe conserved ion-density asymmetry across stacks of interacting layers in cryo electron microscopy that is associated with configurations of inner- and outer-sphere ion-water-mineral complexes that we term complexation waves. Coherent X-ray scattering confirms that complexation waves propagate at room-temperature via a competition between ion dehydration and charge interactions that are coupled across opposing sides of a layer, driving dynamic transitions between stacked and aggregated states via layer exfoliation.
Laura Waller; Jungik Kim; Yang Shao-Horn; George Barbastathis
Interferometric tomography of fuel cells for monitoring membrane water content Journal Article
In: Optics express, vol. 17, no. 17, pp. 14806–14816, 2009.
Links | BibTeX | Tags: digital holography, tomography
@article{waller2009interferometric,
title = {Interferometric tomography of fuel cells for monitoring membrane water content},
author = { Laura Waller and Jungik Kim and Yang Shao-Horn and George Barbastathis},
url = {https://doi.org/10.1364/OE.17.014806},
doi = {10.1364/OE.17.014806},
year = {2009},
date = {2009-08-06},
journal = {Optics express},
volume = {17},
number = {17},
pages = {14806--14816},
publisher = {Optical Society of America},
keywords = {digital holography, tomography},
pubstate = {published},
tppubtype = {article}
}