文章信息/Info

Title:

Butterfly Wing Scales Templated 3D Hierarchical Micro/Nano Optical Materials

作者:

趙華梅; 顧佳俊; 劉慶雷; 張旺; 張荻

上海交通大學 金屬基復合材料國家重點實驗室

Author(s):

ZHAO Huamei;  GU Jiajun;  LIU Qinglei;  ZHANG Wang;  ZHANG Di

State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University

關鍵詞:

蝶翅; 分級; 微納; 光學材料; 仿生

Keywords:

butterfly wing;  hierarchical;  micro/nano;  optical material;  biomimetic

DOI:

10.7502/j.issn.1674-3962.2017.07.09

文獻標志碼:

A

摘要:

蝴蝶經過自然進化形成由脊（ridge）、肋（rib）、短肋（strut）等微結構構成的多層次、多維度的微納分級結構，作用于入射光線，使其呈現出獨特的光學特性。以蝶翅為模板，制備無機或有機三維材料，不僅可獲得結構色、抗反射、熱響應、選擇性氣體響應、定向粘連、超疏水等多種功能特性，并且可通過采用結構不同的蝶翅，改變復合物的厚度等因素進行調控；同時克服了人為仿生過程中設備復雜、構型簡單、成本高的問題，為制備結構功能一體化材料提供了新的思路。從金屬、金屬氧化物、聚合物三個方面重點闡述蝶翅所賦予材料的特殊光學效應。金屬蝶翅上的“肋（rib）”結構具有顯著的表面局域增強效應，如Au蝶翅的靈敏度比商用表面增強拉曼光譜（SERS）基板Klarite的高10倍但成本僅為其1/10；蝶翅表面的微細鱗片具有“捕光”效應，如蜂窩狀結構的黑色鱗片對可見光的平均吸收率達到96%以上，可應用在光陽極、光催化等方面；蝶翅賦予響應性光子晶體特殊的光學特性，其會隨著周圍環境，如pH、電場、溫度等發生變化，為制備更加簡單、靈敏度高的傳感器提供了途徑。

Abstract:

Butterfly has been developing elaborated hierarchical micro/nano structures with multiple layers and dimensions through natural selection for millions of years. The microstructures are composed of ridge, rib and strut and they act on incident light to present special optical characteristics. 3D inorganic or organic materials templated from butterfly wing scales can not only get multifunctional properties, such as structural color, antireflection, thermal�瞨esponse, selective vapor response, directional adhesion and superhydrophobicity and they can be controlled by using wings with different structures or changing the thickness of replica, but also avoid the problem of complex equipment, simple configuration and high cost in the artificial biomimetic process. In this paper, the special optical characteristics of butterfly wing scales templated metal, metal oxide, polymer are summarized. Firstly, the “rib” structures on metal scales have significant surface localized enhancement effect. The Au scales are 10 times more sensitivity than commercial Surface Enhanced Raman Scattering (SERS) substrate but cost only 1/10. Secondly, the micro scales on wings have “light trapping” effect and the honeycomb structured black scales can absorb average 96% of visible light which can be applied to light anode and photocatalysis etc. Finally, butterfly wings endow responsive photonic crystals with special photo characteristics which change with the surrounding environment such as pH, electric field, temperature, etc. This property provides a new way for making simple and sensitivity sensors.