title: Rapid Cellulose-Mediated Microwave Sintering for High-Conductivity Ag Patterns on Paper.
abstract: Cellulose-based paper is essential in everyday life, but it also has further potentials for use in low-cost, printable, disposable, and eco-friendly electronics. Here, a method is developed for the cellulose-mediated microwave sintering of Ag patterns on conventional paper, in which the paper plays a significant role both as a flexible insulating substrate for the conductive Ag pattern and as a lossy dielectric media for rapid microwave heating. The anisotropic dielectric properties of the cellulose fibers mean that a microwave electric field applied parallel to the paper substrate provides sufficient heating to produce Ag patterns with a conductivity 29-38% that of bulk Ag in a short period of time (∼1 s) at 250-300 °C. Significantly, there is little thermal degradation of the substrate during this process. The microwave-sintered Ag patterns exhibit good mechanical stability against 10 000 bending cycles and can be easily soldered with lead-free solder. Therefore, cellulose-mediated microwave sintering presents a promising means of achieving short processing times and high electrical performance in flexible paper electronics.
authors.affiliation: Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI) , 12, Bulmosan-ro 10Beon-gil, Changwon 51543, Republic of Korea.|Department of Energy and Power Conversion Engineering, University of Science and Technology (UST) , Daejeon 34113, Republic of Korea.
authors.forename: Sunshin
authors.initials: S
authors.lastname: Jung
authors.affiliation: Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI) , 12, Bulmosan-ro 10Beon-gil, Changwon 51543, Republic of Korea.
authors.forename: Su Jin
authors.initials: SJ
authors.lastname: Chun
authors.affiliation: Power Apparatus Research Center, Korea Electrotechnology Research Institute (KERI) , 12, Bulmosan-ro 10Beon-gil, Changwon 51543, Republic of Korea.
authors.forename: Chae-Hwa
authors.initials: CH
authors.lastname: Shon
keywords: Ag nanoparticles; Ag patterns; cellulose paper; flexible printed electronics; microwave heating; microwave sintering; paper electronics