Botanical-Inspired 4D Printing of Hydrogel at the Microscale

被引：194

作者：

Hu, Yanlei ^{[1
,2
]}

Wang, Zhongyu ^{[1
,2
]}

Jin, Dongdong ^{[3
]}

Zhang, Chenchu ^{[4
]}

Sun, Rui ^{[1
,2
]}

Li, Ziqin ^{[1
,2
]}

Hu, Kai ^{[1
,2
]}

Ni, Jincheng ^{[1
,2
]}

Cai, Ze ^{[1
,2
]}

Pan, Deng ^{[1
,2
]}

Wang, Xuewen ^{[5
]}

Zhu, Wulin ^{[1
,2
]}

Li, Jiawen ^{[1
,2
]}

Wu, Dong ^{[1
,2
]}

Zhang, Li ^{[3
]}

Chu, Jiaru ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Dept Precis Machinery & Precis Instrumentat, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Precis Machinery & Precis Instrumentat, CAS Key Lab Mech Behav & Design Mat, Hefei 230026, Anhui, Peoples R China

[3] Chinese Univ Hong Kong, Dept Mech & Automat Engn, Hong Kong 999077, Peoples R China

[4] Hefei Univ Technol, Inst Ind & Equipment Technol, Hefei 230009, Anhui, Peoples R China

[5] Wuhan Univ Technol, Int Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2020年 / 30卷 / 04期

基金：

中国国家自然科学基金;

关键词：

4D printing; femtosecond laser; micro-particles capture; pH-responsive hydrogels; MAGNETIC NANOPARTICLES; SHAPE TRANSFORMATIONS; FABRICATION; RESOLUTION; ACTUATION; CAPTURE; CLOSURE; SOFT;

D O I：

10.1002/adfm.201907377

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Botanical systems have evolved the intriguing ability to respond to diverse stimuli due to long-term survival competition. Mimicking these dynamic behaviors has greatly advanced the developments in wide fields ranging from soft robotics, precision sensors to drug delivery and biomedical devices. However, realization of stimuli-responsive components at the microscale with high response speed still remains a significant challenge. Herein, the miniature biomimetic 4D printing of pH-responsive hydrogel is reported in spatiotemporal domain by femtosecond laser direct writing. The dimension of the printed architectures is at the microscale (<10(2) mu m) and the response speed is reduced down to subsecond level (<500 ms). Shape transformation with multiple degrees of freedom is accomplished by taking advantage of pH-triggered expansion, contraction, and torsion. Biomimetic complex shape-morphing is enabled by adopting flexible scanning strategies. In addition, application of this 4D-printed micro-architecture in selective micro-object trapping and releasing is demonstrated, showcasing its possibilities in micromanipulation, single-cell analysis, and drug delivery.

引用

页数：10

共 62 条

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