Biomimetic Polymer Film with Brilliant Brightness Using a One-Step Water Vapor-Induced Phase Separation Method
Biomimetic Polymer Film with Brilliant Brightness Using a One-Step Water Vapor-Induced Phase Separation Method
复制标题
采用一步水蒸气诱导相分离方法制备具有明亮亮度的仿生聚合物薄膜
DOI：
10.1002/adfm.201808885
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发表时间：
2019
影响因子：
19
通讯作者：
Wiersma Diederik S
中科院分区：
文献类型：
--
作者：
Zou Weizhi;Pattelli Lorenzo;Guo Jing;Yang Shijia;Yang Meng;Zhao Ning;Xu Jian;Wiersma Diederik S
The scales of the whiteCyphochilusbeetles are endowed with unusual whiteness arising from the exceptional scattering efficiency of their disordered ultrastructure optimized through millions of years of evolution. Here, a simple, one‐step method based on water vapor–induced phase separation is developed to prepare thin polystyrene films with similar microstructure and comparable optical performance. A typical biomimetic 3.5 µm PS film exhibits a diffuse reflectance of 61% at 500 nm wavelength, which translates into a transport mean free path below 1 µm. A complete optical characterization through Monte Carlo simulations reveals how such a scattering performance arises from the scattering coefficient and scattering anisotropy, whose interplay provides insight into the morphological properties of the material. The potential of bright‐white coatings as smart sensors or wearable devices is highlighted using a treated 3.5 µm film as a real‐time sensor for human exhalation.
