Issue

Vol. 17 (2025)

Nanograting-Based Dynamic Structural Colors Using Heterogeneous Materials

https://doi.org/10.1007/s40820-024-01554-7
Jingang Wang
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Haibo Yu
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Jianchen Zheng
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Yuzhao Zhang
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Hongji Guo
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Ye Qiu
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Xiaoduo Wang
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Yongliang Yang
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Lianqing Liu
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China

Corresponding Author: Lianqing Liu

lqliu@sia.cn

Nano-Micro Letters, Vol. 17 (2025), Article Number: 59

Abstract

Dynamic structural colors can change in response to different environmental stimuli. This ability remains effective even when the size of the species responsible for the structural color is reduced to a few micrometers, providing a promising sensing mechanism for solving microenvironmental sensing problems in micro-robotics and microfluidics. However, the lack of dynamic structural colors that can encode rapidly, easily integrate, and accurately reflect changes in physical quantities hinders their use in microscale sensing applications. Herein, we present a 2.5-dimensional dynamic structural color based on nanogratings of heterogeneous materials, which were obtained by interweaving a pH-responsive hydrogel with an IP-L photoresist. Transverse gratings printed with pH-responsive hydrogels elongated the period of longitudinal grating in the swollen state, resulting in pH-tuned structural colors at a 45° incidence. Moreover, the patterned encoding and array printing of dynamic structural colors were achieved using grayscale stripe images to accurately encode the periods and heights of the nanogrid structures. Overall, dynamic structural color networks exhibit promising potential for applications in information encryption and in situ sensing for microfluidic chips.


Highlights:
1 A 2.5-dimensional dynamic structural color based on nanogratings of heterogeneous materials was proposed by interweaving a pH-responsive hydrogel with IP-L photoresist.
2 The nanogrid structures exhibit brilliant tuneable structural color, high sensitivity, and ultrafast recovery speeds in response to pH.
3 The 4D printing-based grayscale design approach was proposed for the patterned encoding and array printing of dynamic structural colors, promoting their application in patterned printing, information encryption, and microfluidic chip sensing.

Keywords

Dynamic structural colors Four-dimensional printing pH-responsive Nanogrid Heterogeneous materials
Wang, Jingang, Haibo Yu, Jianchen Zheng, Yuzhao Zhang, Hongji Guo, Ye Qiu, Xiaoduo Wang, Yongliang Yang, and Lianqing Liu. 2024. “Nanograting-Based Dynamic Structural Colors Using Heterogeneous Materials”. Nano-Micro Letters 17 (November):59. https://doi.org/10.1007/s40820-024-01554-7.
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