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. 2017 Sep 6;10(9):1046. doi: 10.3390/ma10091046

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Color generation tunable metadevices. (a) Representation of a thin film pack with GST layer sandwiched between two ITO films; (b) Reflectivity spectra for amorphous and crystalline phases of GST with simulation (top part) and measurement (bottom part); (c) An illustrative example of four various films with Pt/ITO/GST/ITO structure and different thickness of ITO (t), which defines the reflective color; (d) Electrical alteration of the color and reconstruction of the patterned image using CAFM; (e) The flexibility of the reflective display on a plastic substrate. (f) An optical image of the crossbar device; (g) I–V curve of the electrically switchable device; (h) More than 100 set/reset cycles of the fabricated crossbar device. Adapted from [10], with permission from © 2014 Nature Publishing Group.