Laser-induced jigsaw-like graphene structure inspired by Oxalis corniculata ***

作     者：Wentao Wang Longsheng Lu Xiaoyu Lu Zhanbo Liang Biao Tang Yingxi Xie Wentao Wang;Longsheng Lu;Xiaoyu Lu;Zhanbo Liang;Biao Tang;Yingxi Xie

作者机构：School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou 510641China Guangdong Provincial Key Laboratory of Optical Information Materials and TechnologySouth China Normal UniversityGuangzhou 510006China 

出 版 物：《Bio-Design and Manufacturing》 (生物设计与制造（英文）)

年 卷 期：2022年第5卷第4期

页      面：700-713页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 0710[理学-生物学] 081702[工学-化学工艺] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0836[工学-生物工程] 

基　　金：supported by the Natural Science Foundation of Guangdong Province, China (No.2021B1515020087) the National Natural Science Foundation of China (No.51905178) 

主　　题：Laser-induced graphene Oxalis corniculata Linn Bionic Multistage structure Superhydrophobic surface 

摘      要：The laser scribing of polyimide(PI, Kapton) film is a new, simple and effective method for graphene preparation. Moreover,the superhydrophobic surface modification can undoubtedly widen the application fields of graphene. Herein, inspired by the hydrophobic and self-cleaning properties of natural Oxalis corniculata Linn. leaves, we propose a novel bionic manufacturing method for superhydrophobic laser-induced graphene(LIG). By tailoring the geometric parameters(size, roughness and height/area ratio) and chemical composition, the three-dimensional(3D) multistage LIG, i.e., with micro-jigsaw-like and porous structure, can deliver a static water contact angle(WCA) of 153.5° ± 0.6°, a water sliding angle(WSA) of 2.5° ±0.5°, and great superhydrophobic stability lasting for 100 days(WCAs ≈ 150°). This outstanding water repellency is achieved by the secondary structure of jigsaw-like LIG, a porous morphology that traps air layers at the solid–liquid interface. The robust self-cleaning and anti-stick functions of 3D bionic and multistage LIG are demonstrated to confirm its great potential in wearable electronics.