High-Contrast Dynamic Reflecting System Based on Pneumatic Micro/Nanoscale Surface Morphing
High-Contrast Dynamic Reflecting System Based on Pneumatic Micro/Nanoscale Surface Morphing
复制标题
基于气动微/纳米表面变形的高对比度动态反射系统
DOI：
10.1021/acsami.0c19062
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发表时间：
2021
影响因子：
9.5
通讯作者：
Jin Chongjun
中科院分区：
文献类型：
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作者：
Shen Yang;Zou Qiushun;Wan Bo;She Xiaoyi;You Runzhi;Luo Yi;Jin Chongjun
Cephalos豆荚提供了一个迷人的动态反射系统，通过收缩和释放其柔软的皮肤来响应环境刺激，从而创造出所需的颜色和图案。受这种自然显示策略的启发，我们设计了一种新型的基于气动微/纳米表面变形的动态反射系统。该系统由一个薄的金属皮肤/弹性体双层调制基于微流体的气体注射器。得益于金属表面在小气压驱动（4kPa）下的“反射镜面”转变，实现了宽带（500-750 nm）调制的前所未有的93的反射对比度。这种卓越的响应还具有出色的循环稳定性（>2500次）和快速响应时间（≤ 0.2 s）。这些优点使得能够实现灵敏度为178 kPa-1的鲁棒且超灵敏的光学气体压力传感器，这比基于法布里-珀罗干涉仪或马赫-曾德尔干涉仪的传统光学气体压力传感器高3-4个数量级。此外，作为概念验证应用，我们还实验演示了曲率可变的凸面镜和非虹彩动态显示，这表明我们的非虹彩动态反射系统将潜在地拓宽自适应光学器件、传感器和显示器的应用。
Cephalopods offer a fascinating dynamic reflecting system to create desired colors and patterns through contracting and releasing their soft skins in response to environmental stimuli. Inspired by this natural display strategy, we designed a novel dynamic reflecting system based on pneumatic micro/nanoscale surface morphing. This system consists of a thin metal skin/elastomer bilayer modulated by a microfluidic-based gas injector. Benefited from the “wrinkled–specular” transition of the metal’s surface under a small pneumatic actuation (4 kPa), an unprecedented reflectance contrast of 93 for broad-band (500–750 nm) modulation is achieved. This remarkable response also has excellent cycle stability (>2500 times) and fast response time (∼0.2 s). These advantages enable a robust and ultrasensitive optical gas pressure sensor with a sensitivity of 178 kPa–1, which is 3–4 orders of magnitude higher than those of conventional optical gas pressure sensors based on either a Fabry–Pérot interferometer or a Mach–Zehnder interferometer. Moreover, as proof-of-concept applications, we also experimentally demonstrated a curvature-variable convex mirror and noniridescent dynamic display, suggesting that our pneumatically dynamic reflecting system will potentially broaden the applications in adaptive optical devices, sensors, and displays.