Structural regulation of silver nanowires and their application in flexible electronic thin films

Publication date: 15 September 2018
Source:Materials & Design, Volume 154
Author(s): Jin-Ju Chen, Shu-Li Liu, Hai-Bin Wu, Enrico Sowade, Reinhard R. Baumann, Yan Wang, Fu-Qiang Gu, Chen-Ren-Lang Liu, Zhe-Sheng Feng
Crystalline quality and capping agent ratio are crucial to the electrical property of silver nanowires (AgNWs). In this paper, in order to achieve the high conductance, the crystalline quality of AgNWs was regulated by a comparative study of mediated ions Cu²⁺ and Fe³⁺ in polyol process, and the capping ratio of Poly(N-vinylpyrrolidone) (PVP) on the surface of AgNWs was intensively adjusted. The proper addition of Fe³⁺ ions was a more favorable route to achieve AgNWs with fine crystallinity and uniform dimension, and a monolayer PVP capping on AgNWs surface was finally obtained. The as-prepared AgNWs was applied to formulate a conductive ink and then conductive tracks were formed on polymeric substrate after a mild temperature treatment. A high electrical conductivity of 3.93 × 10⁵ S/cm and an outstanding bending resistance were achieved for these tracks. Moreover, 20 wt% AgNWs was embedded into polypyrrole (PPy) as a filler to form a flexible electromagnetic interference (EMI) shielding thin film. The AgNWs could greatly improve the conductivity of PPy film, and correspondingly the shielding effectiveness (SET) of PPy/AgNWs was almost 3.57 times higher than that of pure PPy.

Graphical abstract

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