DataVXAdvanced MaterialsPaper
journal article·2021-04

Mimicking Nature's Butterflies: Electrochromic Devices with Dual‐Sided Differential Colorations

Jian Chen, Zhen Wang, Chenglong Liu, Zhigang Chen, Xueqing Tang, Qi Wu, Shu Zhang, Ge Song, Shan Cong, Qin Chen, Zhigang Zhao

Advanced Materials· Volume 33· Issue 14
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Source abstract

Abstract

Abstract Some butterfly species such as the orange oakleaf (Kallima inachus) have strikingly different colors on the dorsal (front) sides of their wings compared to those on the ventral (back) sides of their wings, which helps camouflage the butterflies from predators and attract potential mates. However, few human‐made materials, devices, and technologies can mimic such differential coloring for a long time. Here, a new type of Janus‐structured two‐sided electrochromic device is developed that, upon application of different voltages, exhibits a coloration state on one side that is distinctly different from that on the other side. This is achieved by inserting an optically thin (4–8 nm) metallic layer with a complex refractive index, such as a layer composed of tungsten, titanium, copper or silver, into typical electrochromic structures.
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Research context

OpenAlex topics: Photonic Crystals and Applications · Electrowetting and Microfluidic Technologies · Transition Metal Oxide Nanomaterials

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Affiliations

Key Lab of Nanodevices and Applications Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Suzhou 215123 China

Key Laboratory of Multifunctional Nanomaterials and Smart Systems Chinese Academy of Sciences (CAS) Suzhou 215123 China

Division of Nanomaterials Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Nanchang 330200 China

Institute of Nanophotonics Jinan University Guangzhou 511443 China

Funding

National Natural Science Foundation of China · Chinese Academy of Sciences · Youth Innovation Promotion Association of the Chinese Academy of Sciences · National Basic Research Program of China

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