Qi Qiaoyun, Li Yanru, Qiu Wu, Zhang Wenhai, Shi Chenyang, Hou Chen, Yan Wen, Huang Jiani, Yang Likun, Wang Hao, Guo Wenxi, Liu Xiang Yang, Lin Naibo
Research Institution for Biomimetics and Soft Matter, Fujian Key Provincial Laboratory for Soft Functional Materials Research, College of Materials, Xiamen University 422 Siming South Road Xiamen 361005 People's Republic of China
Department of Physics, National University of Singapore 2 Science Drive 3 Singapore 117542 Republic of Singapore.
RSC Adv. 2019 May 7;9(25):14254-14259. doi: 10.1039/c9ra02147g.
Transient devices have attracted extensive interest because they allow changes in physical form and device function under the control of external stimuli or related commands and have very broad application prospects for information security, biomedical care and the environment. Transient bioelectrical devices were fabricated inspired by a silkworm moth breaking out of its cocoon, which has shown many advantages, including the use of mild stimulation, biocompatible materials, a simple process, and a universal strategy. For the fabrication of the transient devices, heat-sensitive microspheres with a 9.3 mol L LiBr solution in wax shells were prepared by microfluidic technology, which were then assembled into silk fibroin (SF) electronic materials/devices, such as SF conductive film, an LED circuit on SF film, and a Ag/SF film/Pt/SF film memristor. The contribution from the LiBr/wax microspheres to the transient time of the SF films upon exposure to heat was quantitatively investigated. This approach was applied to transiently dissolve a flexible Ag-nanowire resistance circuit line on a SF substrate. Moreover, memristors constructed with a functional layer of SF were destroyed by melting the LiBr/wax microspheres. This technique paves the way for realizing transient bioelectrical devices inspired by biological behavior, which have been well optimized by nature evolution.
瞬态器件因其能在外部刺激或相关指令的控制下改变物理形态和器件功能而备受广泛关注，在信息安全、生物医学护理和环境领域具有非常广阔的应用前景。受蚕蛾破茧启发制造的瞬态生物电装置已展现出诸多优势，包括使用温和刺激、生物相容性材料、简单的工艺以及通用的策略。对于瞬态器件的制造，通过微流控技术制备了蜡壳中含有9.3 mol L溴化锂溶液的热敏微球，然后将其组装成丝素蛋白（SF）电子材料/器件，如SF导电膜、SF膜上的LED电路以及Ag/SF膜/Pt/SF膜忆阻器。定量研究了溴化锂/蜡微球对SF膜受热时瞬态时间的影响。该方法被应用于在SF基板上瞬态溶解柔性银纳米线电阻电路线。此外，通过熔化溴化锂/蜡微球破坏了由SF功能层构建的忆阻器。这项技术为实现受生物行为启发的瞬态生物电装置铺平了道路，这些装置已经通过自然进化得到了很好的优化。
