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An Ingenious Super Light Trapping Surface Templated from Butterfly Wing Scales.

Han Z, Li B, Mu Z, Yang M, Niu S, Zhang J, Ren L - Nanoscale Res Lett (2015)

Bottom Line: Based on the super light trapping property of butterfly Trogonoptera brookiana wings, the SiO2 replica of this bionic functional surface was successfully synthesized using a simple and highly effective synthesis method combining a sol-gel process and subsequent selective etching.It could be concluded that the SiO2 negative replica inherited not only the original super light trapping architectures, but also the super light trapping characteristics of bio-template.This work may open up an avenue for the design and fabrication of super light trapping materials and encourage people to look for more super light trapping architectures in nature.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Bionic Engineering (Ministry of Education, China), Jilin University, Changchun, 130022, P. R. China, zwhan@jlu.edu.cn.

ABSTRACT
Based on the super light trapping property of butterfly Trogonoptera brookiana wings, the SiO2 replica of this bionic functional surface was successfully synthesized using a simple and highly effective synthesis method combining a sol-gel process and subsequent selective etching. Firstly, the reflectivity of butterfly wing scales was carefully examined. It was found that the whole reflectance spectroscopy of the butterfly wings showed a lower level (less than 10 %) in the visible spectrum. Thus, it was confirmed that the butterfly wings possessed a super light trapping effect. Afterwards, the morphologies and detailed architectures of the butterfly wing scales were carefully investigated using the ultra-depth three-dimensional (3D) microscope and field emission scanning electronic microscopy (FESEM). It was composed by the parallel ridges and quasi-honeycomb-like structure between them. Based on the biological properties and function above, an exact SiO2 negative replica was fabricated through a synthesis method combining a sol-gel process and subsequent selective etching. At last, the comparative analysis of morphology feature size and the reflectance spectroscopy between the SiO2 negative replica and the flat plate was conducted. It could be concluded that the SiO2 negative replica inherited not only the original super light trapping architectures, but also the super light trapping characteristics of bio-template. This work may open up an avenue for the design and fabrication of super light trapping materials and encourage people to look for more super light trapping architectures in nature.

No MeSH data available.


Related in: MedlinePlus

Schematic illustration of the multiple reflection and refraction occurred in the SiO2 negative replicas and the reflectance spectroscopy analysis of the SiO2 negative replica. a After multiple reflections and refractions, incident light traveled for a longer distance, and only a small part of the solar energy was reflected back to the air. b The average reflection of the SiO2 negative replicas was about 20 % which was just 1/4 of the reflection of the flat plate without the negative quasi-honeycomb-like structure
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Fig5: Schematic illustration of the multiple reflection and refraction occurred in the SiO2 negative replicas and the reflectance spectroscopy analysis of the SiO2 negative replica. a After multiple reflections and refractions, incident light traveled for a longer distance, and only a small part of the solar energy was reflected back to the air. b The average reflection of the SiO2 negative replicas was about 20 % which was just 1/4 of the reflection of the flat plate without the negative quasi-honeycomb-like structure

Mentions: The simplified model of the SiO2 negative replicas was built as shown in Fig. 5a. When incident light traveled through air to the SiO2 material, reflection and refraction would happen on the interface at the same time. After multiple reflections and refractions, incident light traveled for a longer distance. Only a small part of the solar energy was reflected back to the air, resulting in most of the incident light being effectively adsorbed within the super light trapping architectures eventually. What is more, the humps on the top of the ridges and the fold stripes on both sides of the ridges enhanced the scattering of incident light within super light trapping architectures of the SiO2 negative replicas, which also reduced the solar energy loss (SEL) due to the reflectance from the SiO2 negative replica.Fig. 5


An Ingenious Super Light Trapping Surface Templated from Butterfly Wing Scales.

Han Z, Li B, Mu Z, Yang M, Niu S, Zhang J, Ren L - Nanoscale Res Lett (2015)

Schematic illustration of the multiple reflection and refraction occurred in the SiO2 negative replicas and the reflectance spectroscopy analysis of the SiO2 negative replica. a After multiple reflections and refractions, incident light traveled for a longer distance, and only a small part of the solar energy was reflected back to the air. b The average reflection of the SiO2 negative replicas was about 20 % which was just 1/4 of the reflection of the flat plate without the negative quasi-honeycomb-like structure
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4549356&req=5

Fig5: Schematic illustration of the multiple reflection and refraction occurred in the SiO2 negative replicas and the reflectance spectroscopy analysis of the SiO2 negative replica. a After multiple reflections and refractions, incident light traveled for a longer distance, and only a small part of the solar energy was reflected back to the air. b The average reflection of the SiO2 negative replicas was about 20 % which was just 1/4 of the reflection of the flat plate without the negative quasi-honeycomb-like structure
Mentions: The simplified model of the SiO2 negative replicas was built as shown in Fig. 5a. When incident light traveled through air to the SiO2 material, reflection and refraction would happen on the interface at the same time. After multiple reflections and refractions, incident light traveled for a longer distance. Only a small part of the solar energy was reflected back to the air, resulting in most of the incident light being effectively adsorbed within the super light trapping architectures eventually. What is more, the humps on the top of the ridges and the fold stripes on both sides of the ridges enhanced the scattering of incident light within super light trapping architectures of the SiO2 negative replicas, which also reduced the solar energy loss (SEL) due to the reflectance from the SiO2 negative replica.Fig. 5

Bottom Line: Based on the super light trapping property of butterfly Trogonoptera brookiana wings, the SiO2 replica of this bionic functional surface was successfully synthesized using a simple and highly effective synthesis method combining a sol-gel process and subsequent selective etching.It could be concluded that the SiO2 negative replica inherited not only the original super light trapping architectures, but also the super light trapping characteristics of bio-template.This work may open up an avenue for the design and fabrication of super light trapping materials and encourage people to look for more super light trapping architectures in nature.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Bionic Engineering (Ministry of Education, China), Jilin University, Changchun, 130022, P. R. China, zwhan@jlu.edu.cn.

ABSTRACT
Based on the super light trapping property of butterfly Trogonoptera brookiana wings, the SiO2 replica of this bionic functional surface was successfully synthesized using a simple and highly effective synthesis method combining a sol-gel process and subsequent selective etching. Firstly, the reflectivity of butterfly wing scales was carefully examined. It was found that the whole reflectance spectroscopy of the butterfly wings showed a lower level (less than 10 %) in the visible spectrum. Thus, it was confirmed that the butterfly wings possessed a super light trapping effect. Afterwards, the morphologies and detailed architectures of the butterfly wing scales were carefully investigated using the ultra-depth three-dimensional (3D) microscope and field emission scanning electronic microscopy (FESEM). It was composed by the parallel ridges and quasi-honeycomb-like structure between them. Based on the biological properties and function above, an exact SiO2 negative replica was fabricated through a synthesis method combining a sol-gel process and subsequent selective etching. At last, the comparative analysis of morphology feature size and the reflectance spectroscopy between the SiO2 negative replica and the flat plate was conducted. It could be concluded that the SiO2 negative replica inherited not only the original super light trapping architectures, but also the super light trapping characteristics of bio-template. This work may open up an avenue for the design and fabrication of super light trapping materials and encourage people to look for more super light trapping architectures in nature.

No MeSH data available.


Related in: MedlinePlus