Fabrication of 3D Photonic Crystals from Chitosan That Are Responsive to Organic Solvents

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• 作者：Guanbo Huang ; Yibing Yin ; Zeng Pan ; Mingxi Chen ; Lei Zhang ; Yu Liu ; Yongli Zhang ; Jianping Gao
• 刊名：Biomacromolecules
• 出版年：2014
• 出版时间：December 8, 2014
• 年：2014
• 卷：15
• 期：12
• 页码：4396-4402
• 全文大小：496K
• ISSN：1526-4602

文摘

Inspired by photonic nanostructures in nature, such as the hair-like chaetae on the body of sea mice, inverse opal photonic crystals films were fabricated with chitosan, a kind of biomacromolecule found in nature. First, monodispersed polystyrene (PS) colloidal crystal templates with different particle sizes were prepared. The inverse opal films (IOFs) were fabricated through in situ cross-linking of the PS templates. The IOFs contain periodically ordered interconnecting pores that endow the films with photonic stop bands and structural colors, which are visible to the naked eye. The IOFs exhibit rapid reversible changes in their structural colors and reflectance peaks in response to alcohols and phenols. Possible mechanisms for the shifts in the IOF鈥檚 reflectance peaks are proposed. The changes in the IOFs in response to alcohols and phenols provide a potential way to visually detect these organic solvents.