Optical Printing of Conductive Silver on Ultrasmooth Nanocellulose Paper for Flexible Electronics. Issue 7 (14th January 2022)

• Record Type: Journal Article
• Authors: Pan, Yueyue; Qin, Zhen; Kheiri, Sina; Ying, Binbin; Pan, Peng; Peng, Ran; Liu, Xinyu
• Is Part Of: Advanced engineering materials. Volume 24:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-14
• Subjects: conductive silver printing -- electrochemical biosensors -- flexible electronics -- nanofibrillated cellulose paper -- photoreduction; Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.202101598
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : The nanofibrillated cellulose paper (nanocellulose paper or nanopaper), which is flexible, transparent, ultrasmooth, and biodegradable, has emerged as a new substrate material for the next generation of paper‐based flexible electronics. Herein a visible light‐induced printing technique for depositing highly conductive silver (Ag) patterns on nanopaper is reported. The optical Ag printing process is simple to implement at room temperature and only requires nontoxic, low‐cost aqueous chemical solutions and an inexpensive light projection setup. The abundant carboxyl groups on the nanopaper enable efficient absorption of Ag + ions on the nanopaper surface for light‐induced reduction of Ag + into a thin film of densely packed silver nanoparticles (AgNPs). Chemical annealing of the deposited AgNPs further enhances the conductivity of the printed Ag patterns. The mechanical and electrical properties of the printed Ag patterns on nanopaper are characterized, and the application of the optical Ag printing technique fabricating the nanopaper‐based flexible circuits and electrochemical biosensors is also demonstrated. The optical printing technique will enable new designs and applications of nanopaper‐based flexible electronics. Abstract : A visible light‐induced silver printing technique is developed for constructing nanopaper‐based flexible electronics. The printed silver patterns exhibit high conductivity, excellent flexibility, superior mechanical and electrical stability, and good sustainability. Enabled by the silver printing technique, nanopaper‐based flexible circuits and biosensors are demonstrated with satisfactory performance.