Flexible biodegradable transparent heaters based on fractal-like leaf skeletons

作     者：Vipul Sharma Anastasia Koivikko Kyriacos Yiannacou Kimmo Lahtonen Veikko Sariola 

作者机构：Faculty of Medicine and Health TechnologyTampere UniversityFinland Korkeakoulunkatu 333720TampereFinland Faculty of Engineering and Natural SciencesTampere UniversityP.O.Box 69233014TampereFinland 

出 版 物：《npj Flexible Electronics》 (npj-柔性电子（英文）)

年 卷 期：2020年第4卷第1期

页      面：235-242页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：This work was supported by the Academy of Finland(Grants:#299087 and#292477) 

主　　题：nanowires fractal transparent 

摘      要：We present a facile method to prepare flexible,transparent,biodegradable,and fast resistive heaters by applying silver(Ag)nanowires onto fractal-like leaf *** fractal-like structure of the leaf skeleton maximizes its surface area,improving the transfer of heat to its surroundings and thus making the heater fast,without compromising *** ion layer on the leaf skeleton helps to conformally cover the surface with Ag *** sheet resistance of the heater can be controlled by the loading of Ag nanowires,without sacrificing the optical transmittance(~80%at 8Ωsq^(−1)).The heating is uniform and the surface temperature of a 60 mm×60 mm heater(8Ωsq^(−1))can quickly(5-10 s)raise to 125℃ with a low voltage(6 V).The heater displays excellent mechanical flexibility,showing no significant change in resistance and heating temperature when bent up to curvature of 800 m^(−1).Finally,we demonstrate the potential of the bioinspired heater as a thermotherapy patch by encapsulating it in a biodegradable tape and mounting it on the human wrist and *** study shows that fractal-like structures from nature can be repurposed as fractal designs for flexible electronics.