AI Article Synopsis
- The study focuses on how ionic liquid gating can cause changes in the structure and properties of thin-film materials, specifically looking at the transformation between two different phases of SrCoO.
- Researchers used high-resolution transmission electron microscopy to observe this transformation in real-time, discovering that the phase boundary moves much faster laterally than it does vertically.
- This difference in speed allows for the creation of complex three-dimensional metallic structures, such as cylinders and rings, paving the way for innovative designs in material engineering.
Article Abstract
The controlled transformation of materials, both their structure and their physical properties, is key to many devices. Ionic liquid gating can induce the transformation of thin-film materials over long distances from the gated surface. Thus, the mechanism underlying this process is of considerable interest. Here we directly image, using in situ, real-time, high-resolution transmission electron microscopy, the reversible transformation between the oxygen vacancy ordered phase brownmillerite SrCoO and the oxygen ordered phase perovskite SrCoO. We show that the phase transformation boundary moves at a velocity that is highly anisotropic, traveling at speeds ~30 times faster laterally than through the thickness of the film. Taking advantage of this anisotropy, we show that three-dimensional metallic structures such as cylinders and rings can be realized. Our results provide a roadmap to the construction of complex meso-structures from their exterior surfaces.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6076294 | PMC |
| http://dx.doi.org/10.1038/s41467-018-05330-1 | DOI Listing |
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