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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Photograph (a) and schematic diagram (b) of Cu/ECAs or PECAs/Cu sandwich structure for shearing test; (c) The cross section of Cu/PECAs/Cu bonding joint and EDS line scan corresponding to the write line; (d) dependence of the shear strength of ECAs joint on the amount of adding PANIs.