title: Crystalline Nanojoining Silver Nanowire Percolated Networks on Flexible Substrate.
abstract: Optoelectronic performance of metal nanowire networks are dominated by junction microstructure and network configuration. Although metal nanowire printings, such as silver nanowires (AgNWs) or AgNWs/semiconductor oxide bilayer, have great potential to replace traditional ITO, efficient and selective nanoscale integration of nanowires is still challenging owing to high cross nanowire junction resistance. Herein, pulsed laser irradiation under controlled conditions is used to generate local crystalline nanojoining of AgNWs without affecting other regions of the network, resulting in significantly improved optoelectronic performance. The method, laser-induced plasmonic welding (LPW), can be applied to roll-to-roll printed AgNWs percolating networks on PET substrate. First principle simulations and experimental characterizations reveal the mechanism of crystalline nanojoining originated from thermal activated isolated metal atom flow over nanowire junctions. Molecular dynamic simulation results show an angle-dependent recrystallization process during LPW. The excellent optoelectronic performance of AgNW/PET has achieved Rs ∼ 5 Ω/sq at high transparency (91% @λ = 550 nm).
authors.affiliation: School of Industrial Engineering, Purdue University ,315 North Grant Street, West Lafayette, Indiana 47907, United States.|Birck Nanotechnology Center, Purdue University ,1205 West State Street, West Lafayette, Indiana 47907, United States.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Nian
authors.affiliation: School of Industrial Engineering, Purdue University ,315 North Grant Street, West Lafayette, Indiana 47907, United States.|Birck Nanotechnology Center, Purdue University ,1205 West State Street, West Lafayette, Indiana 47907, United States.
authors.forename: Mojib
authors.initials: M
authors.lastname: Saei
authors.affiliation: Birck Nanotechnology Center, Purdue University ,1205 West State Street, West Lafayette, Indiana 47907, United States.|Department of Physics and Astronomy, Purdue University , 525 Northwestern Avenue, West Lafayette, Indiana 47907, United States.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Air Force Research Laboratory , 2941 Hobson Way, Dayton, Ohio 45433, United States.
authors.forename: Ganguli
authors.initials: G
authors.lastname: Sabyasachi
authors.affiliation: School of Industrial Engineering, Purdue University ,315 North Grant Street, West Lafayette, Indiana 47907, United States.|Birck Nanotechnology Center, Purdue University ,1205 West State Street, West Lafayette, Indiana 47907, United States.
authors.forename: Biwei
authors.initials: B
authors.lastname: Deng
authors.affiliation: Birck Nanotechnology Center, Purdue University ,1205 West State Street, West Lafayette, Indiana 47907, United States.|Department of Physics and Astronomy, Purdue University , 525 Northwestern Avenue, West Lafayette, Indiana 47907, United States.
authors.forename: Yong P
authors.initials: YP
authors.lastname: Chen
authors.affiliation: School of Industrial Engineering, Purdue University ,315 North Grant Street, West Lafayette, Indiana 47907, United States.|Birck Nanotechnology Center, Purdue University ,1205 West State Street, West Lafayette, Indiana 47907, United States.|Department of Mechanical Engineering, Purdue University ,585 Purdue Mall, West Lafayette, Indiana 47907, United States.
authors.forename: Gary J
authors.initials: GJ
authors.lastname: Cheng
keywords: junction; laser plasmonic welding; percolation; roll to roll printing; silver nanowire