title: Nanoparticle chemisorption printing technique for conductive silver patterning with submicron resolution.
abstract: Silver nanocolloid, a dense suspension of ligand-encapsulated silver nanoparticles, is an important material for printing-based device production technologies. However, printed conductive patterns of sufficiently high quality and resolution for industrial products have not yet been achieved, as the use of conventional printing techniques is severely limiting. Here we report a printing technique to manufacture ultrafine conductive patterns utilizing the exclusive chemisorption phenomenon of weakly encapsulated silver nanoparticles on a photoactivated surface. The process includes masked irradiation of vacuum ultraviolet light on an amorphous perfluorinated polymer layer to photoactivate the surface with pendant carboxylate groups, and subsequent coating of alkylamine-encapsulated silver nanocolloids, which causes amine-carboxylate conversion to trigger the spontaneous formation of a self-fused solid silver layer. The technique can produce silver patterns of submicron fineness adhered strongly to substrates, thus enabling manufacture of flexible transparent conductive sheets. This printing technique could replace conventional vacuum- and photolithography-based device processing.
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, Tsukuba 305-8565, Japan.
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Yamada
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, Tsukuba 305-8565, Japan.
authors.forename: Katsuo
authors.initials: K
authors.lastname: Fukuhara
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, Tsukuba 305-8565, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Matsuoka
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, Tsukuba 305-8565, Japan.
authors.forename: Hiromi
authors.initials: H
authors.lastname: Minemawari
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, Tsukuba 305-8565, Japan.
authors.forename: Jun'ya
authors.initials: J
authors.lastname: Tsutsumi
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, Tsukuba 305-8565, Japan.
authors.forename: Nobuko
authors.initials: N
authors.lastname: Fukuda
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, Tsukuba 305-8565, Japan.|Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Aoshima
authors.affiliation: Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
authors.forename: Shunto
authors.initials: S
authors.lastname: Arai
authors.affiliation: Tanaka Kikinzoku Kogyo K. K., Tsukuba 300-4247, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Makita
authors.affiliation: Tanaka Kikinzoku Kogyo K. K., Tsukuba 300-4247, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Kubo
authors.affiliation: Tanaka Kikinzoku Kogyo K. K., Tsukuba 300-4247, Japan.
authors.forename: Takao
authors.initials: T
authors.lastname: Enomoto
authors.affiliation: Department of Material and Biological Chemistry, Yamagata University, Yamagata 990-8560, Japan.
authors.forename: Takanari
authors.initials: T
authors.lastname: Togashi
authors.affiliation: Department of Material and Biological Chemistry, Yamagata University, Yamagata 990-8560, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Kurihara
authors.affiliation: National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, Tsukuba 305-8565, Japan.|Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan.
authors.forename: Tatsuo
authors.identifier: http://orcid.org/0000-0001-5187-7433
authors.initials: T
authors.lastname: Hasegawa