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Multi-stimuli responsive chromism with tailorable mechanochromic sensitivity for versatile interactive sensing under ambient conditions†
Materials Horizons ( IF 13.3 ) Pub Date : 2019-08-13 , DOI: 10.1039/c9mh00851a
Songshan Zeng 1, 2, 3, 4, 5 , Haotian Sun 3, 4, 5, 6 , Cheonjin Park 3, 4, 5, 7 , Monica Zhang 3, 4, 5, 8 , Mengting Zhu 3, 4, 5, 8 , Manqing Yan 1, 2, 3, 4, 5 , Nora Chov 3, 4, 5, 8 , Edward Li 1, 2, 3, 4, 5 , Andrew T. Smith 1, 2, 3, 4, 5 , Gefan Xu 3, 4, 5, 8 , Shuliang Li 1, 2, 3, 4, 5 , Zaili Hou 1, 2, 3, 4, 5 , Yuntao Li 9, 10, 11, 12 , Bing Wang 3, 4, 5, 7 , Dianyun Zhang 3, 4, 5, 6 , Luyi Sun 1, 2, 3, 4, 5
Affiliation  

Multi-stimuli responsive (MSR) chromic materials which can exhibit a color change when exposed to external stimuli demonstrate huge potential in developing new intelligent devices. However, they commonly require complicated synthesis processes that are not suitable for mass production. To facilitate the fabrication of MSR devices, for the first time, we propose a facile 3D integration strategy to rationally assemble various commercial chromic materials, light shielding layers, and a stretchable substrate into a set of MSR devices equipped with thermo-/photo-/mechanochromic characteristics with negligible cross-interferences. Notably, the mechanochromic sensitivity can be readily adjusted to multiple levels via facile pre-stretching methods. Moreover, two types of MSR units are integrated into an interactive electronic device, which exhibits thermo-/photo-/electrochromic responses, and two levels of mechanochromic responses with color changes at 100% and 200% strain, respectively. In addition, another highly sensitive MSR unit is applied to a wearable motion/environmental monitoring chromic device, which can detect finger bending within 30% strain, and monitor environmental stimuli (UV, temperature) with thermal mapping capability. A smartphone-based colorimetric analysis app was also developed for finger bending detection. Comprehensive quantitative characterization and finite element analysis are used to elucidate the performance and intrinsic mechanisms of these MSR responses.

中文翻译:

多刺激响应式色度,具有可定制的机械变色灵敏度,可在环境条件下进行多功能交互式感应

多刺激响应(MSR)铬材料在暴露于外部刺激时会显示颜色变化,在开发新型智能设备方面显示出巨大潜力。然而,它们通常需要不适合大规模生产的复杂合成方法。为了方便制造MSR器件,我们首次提出了一种简便的3D集成策略,以将各种商用铬材料,遮光层和可拉伸基板合理地组装到一组配备有热/光/机械变色特性,交叉干扰可忽略不计。值得注意的是,机械变色灵敏度可通过简便的预拉伸方法。此外,两种类型的MSR单元被集成到一个交互式电子设备中,该设备显示出热/光/电致变色响应以及两种水平的机械致变色响应,分别在100%和200%应变下发生颜色变化。此外,另一种高度灵敏的MSR单元被应用于可穿戴运动/环境监测铬色设备,该设备可以检测30%应变范围内的手指弯曲,并通过热成像功能监测环境刺激(紫外线,温度)。还开发了基于智能手机的比色分析应用程序,用于手指弯曲检测。使用全面的定量表征和有限元分析来阐明这些MSR响应的性能和内在机理。
更新日期:2020-01-04
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