Research Abstract


Nanoparticle chemisorption printing technique for conductive silver patterning with submicron resolution

2016年4月19日 Nature Communications 7 : 11402 doi: 10.1038/ncomms11402



Toshikazu Yamada, Katsuo Fukuhara, Ken Matsuoka, Hiromi Minemawari, Jun’ya Tsutsumi, Nobuko Fukuda, Keisuke Aoshima, Shunto Arai, Yuichi Makita, Hitoshi Kubo, Takao Enomoto, Takanari Togashi, Masato Kurihara & Tatsuo Hasegawa

Corresponding Authors

山田 寿一

長谷川 達生

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.