期刊
ADVANCED FUNCTIONAL MATERIALS
卷 24, 期 21, 页码 3197-3205出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201303555
关键词
mechanochromic; photonic gels; deformation; displays; colloidal crystalline arrays
类别
资金
- National Science Foundation of China [21001083, 21222107]
- Shanghai Rising-Star Program [13QA1401400]
- Youth Talent Plan (Organization Department of the Central Committee of the CPC)
An efficient and straightforward method is developed to prepare a mechanochromic photonic gel by fixing the metastable SiO2 colloidal crystalline array (CCA) in the mixture of ethylene glycol (EG) and poly(ethylene glycol) methacrylate (PEGMA) through photopolymerization. Thanks to the recent fabrication of solvent-wrapped, metastable CCA, a high volume fraction of EG (46%) is introduced to the photonic gel before particle assembly, but not by swelling after polymerization, which leads to a more deformable composite than most reported opal gels. Compared to traditional photonic gels, this opal gel not only has improved mechanochromic sensitivity to weak external force and extended color tuning range from red to blue ( = 150 nm), but also possesses fast and reversible response in millisecond level (20-200 ms), repeatable reflection signals in cycling and fatigue tests, and good resolution in response to localized deformation, which renders it an ideal deformation-based photonic display screen. A new trigger system is designed to solve the large deformation causing color fading in conventional mechanochromic gels and brilliant red, green, and blue (RGB) pixels can be conveniently manipulated by pushing' operations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据