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Title: A universal robust bottom-up approach to engineer Greta-oto-inspired anti-reflective structure
Authors: Vu, Tuan Duc
Cao, Xun
Hu, Hebing
Bao, Jiaxin
Cao, Tun
Hu, Jiangfeng
Zeng, Xianting
Long, Yi
Keywords: Engineering::Materials
Issue Date: 2021
Source: Vu, T. D., Cao, X., Hu, H., Bao, J., Cao, T., Hu, J., Zeng, X. & Long, Y. (2021). A universal robust bottom-up approach to engineer Greta-oto-inspired anti-reflective structure. Cell Reports Physical Science, 2(7), 100479-.
Project: RG103/19
Journal: Cell Reports Physical Science
Abstract: The Greta oto butterfly has transparent wings with extraordinary omnidirectional anti-reflection behavior, owing to unusual nanostructures with random height and pitch/space distribution on its wing surface. The beauty and efficacy of such nanostructures are proven designs but difficult to reproduce en masse. Here, we establish a low-cost bottom-up approach by simply stacking monolayer-aligned agitation-assisted deposition of silver nanowire (AgNW) meshes followed by deposition of various overcoats. Such AgNW meshes provide the template to grow nanostructures, imitating those on the Greta oto's wings that consist of randomly situated nanocones with controllable mean pitches and heights. The resulting nanostructure enhances anti-reflections in both SiO2/AgNW and VO2/AgNW systems, which showed reduced omnidirectional reflectance up to 33% and 70%, respectively. Furthermore, the VO2/AgNW system exhibits enhanced luminous and infrared transmittance without sacrificing solar modulation. Our robust bottom-up approach provides a simpler alternate non-lithographic way to economically produce controlled biomimetic anti-reflective nanostructured coatings.
ISSN: 2666-3864
DOI: 10.1016/j.xcrp.2021.100479
Rights: © 2021 The Authors. This is an open access article under the CC BY-NC-ND license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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