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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

The macroscopic morphology of the butterfly wings and the reflectance spectroscopy of black and green region of the butterfly wings. a Photograph of butterfly Trogonoptera brookiana. b Optical microscopic image of the black butterfly wing scales. c The lower reflectance of the black wing scales was confirmed in the entire wave range
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Fig1: The macroscopic morphology of the butterfly wings and the reflectance spectroscopy of black and green region of the butterfly wings. a Photograph of butterfly Trogonoptera brookiana. b Optical microscopic image of the black butterfly wing scales. c The lower reflectance of the black wing scales was confirmed in the entire wave range

Mentions: Figure 1a showed the overall view of the original butterfly Trogonoptera brookiana. Obviously, there were long smooth black strips located at the front and hind wings of the butterfly, which looked as beautiful as black velvet. With the help of optical metallurgical microscopy, it could be found that the black part of the wings was covered by bright black scales. These black scales were placed in alternate rows, and the scales overlap each other, as shown in Fig. 1b. The reflectance spectroscopy ranging from 400–900 nm of the butterfly wings is shown in Fig. 1c. It was found that the reflectivity of black wings was lower than that of green wings, which was less than 8 % in the range of 400–900 nm. Based upon the butterfly being a kind of poikilothermal animal, it could be inferred that lower reflectance made contributions to reducing the loss of solar energy so that the butterfly could maintain body temperature, which confirmed that the black areas possess a better light trapping property. Hence, the black areas were chosen as the experimental areas to be studied carefully.Fig. 1


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)

The macroscopic morphology of the butterfly wings and the reflectance spectroscopy of black and green region of the butterfly wings. a Photograph of butterfly Trogonoptera brookiana. b Optical microscopic image of the black butterfly wing scales. c The lower reflectance of the black wing scales was confirmed in the entire wave range
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig1: The macroscopic morphology of the butterfly wings and the reflectance spectroscopy of black and green region of the butterfly wings. a Photograph of butterfly Trogonoptera brookiana. b Optical microscopic image of the black butterfly wing scales. c The lower reflectance of the black wing scales was confirmed in the entire wave range
Mentions: Figure 1a showed the overall view of the original butterfly Trogonoptera brookiana. Obviously, there were long smooth black strips located at the front and hind wings of the butterfly, which looked as beautiful as black velvet. With the help of optical metallurgical microscopy, it could be found that the black part of the wings was covered by bright black scales. These black scales were placed in alternate rows, and the scales overlap each other, as shown in Fig. 1b. The reflectance spectroscopy ranging from 400–900 nm of the butterfly wings is shown in Fig. 1c. It was found that the reflectivity of black wings was lower than that of green wings, which was less than 8 % in the range of 400–900 nm. Based upon the butterfly being a kind of poikilothermal animal, it could be inferred that lower reflectance made contributions to reducing the loss of solar energy so that the butterfly could maintain body temperature, which confirmed that the black areas possess a better light trapping property. Hence, the black areas were chosen as the experimental areas to be studied carefully.Fig. 1

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