Fabrication of Robust Paper-Based Electronics by Adapting Conventional Paper Making and Coupling with Wet Laser Writing

作者：Wang, Cheng; Zhao, Zhiling; Wu, Rui; Shi, Xiaowen; Payne, Gregory F.^*; Wang, Xiaohui^*

来源：ACS Sustainable Chemistry & Engineering, 2023, 11(26): 9782-9791.

DOI：10.1021/acssuschemeng.3c01943

• cellulose paper electronics
• laser patterning
• graphene oxide
• gold nanoparticle growth
• electrochemicalsensing

Paper offers the potential as a sustainable substratefor electronics,yet a key remaining challenge is patterning. While most demonstrationstudies pattern by printing conducting inks onto cellulose, we adaptconventional paper making to create a stable non-conducting compositeof graphene oxide (GO; 30%) and cellulose (70%) and then pattern thiscomposite using wet laser writing. Specifically, the GO/cellulosecomposite is as follows: soaked in a HAuCl4 solution; laserpatterned to simultaneously reduce GO (rGO) and generate metallicgold seeds (typical writing speed 20 s center dot cm(-2)); and then incubated (30 min) in HAuCl4 solution to "grow"gold nanoparticles (Au NPs) in the pre-seeded patterned region. Variousmethods demonstrate that laser patterning induces spatially selectivechemical changes in the composite. Functionally, the patterned region(Au NPs/rGO/cellulose) shows a 200-fold increase in conductivity (1362S m(-1)) compared to the unpatterned region (GO/cellulose).As a simple demonstration, we fabricated patterned composite paperelectrodes and demonstrate excellent electrochemical sensing performancein terms of sensitivity, selectivity, stability, and repeatability.We envision that laser patterning of composite paper offers unprecedentedopportunities for scalable manufacturing because conventional papermakingcan generate the stable substrate and laser patterning can be extendedfrom serial writing to parallel photolithographic methods common inelectronics fabrication. @@@ Thiswork presents a new method for large-scale preparationof electrochemical sensors from sustainable cellulose-paper.

• 单位
  武汉大学