Preparation and electrical properties of sintered copper powder compacts modified by polydopamine-derived carbon nanofilms
In this study, copper (Cu)/polydopamine (PDA) composite was fabricated by vacuum hot-press sintering of micrometer-sized Cu particles covered with PDA film tailored at the nanometer scale thickness. The resultant compacts exhibited much higher electrical conductivity than the uncoated counterparts. Analyses of sintered samples using scanning and transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy revealed the conversion of PDA into carbonized PDA (cPDA). The increased mass density and grain growth are likely responsible for improved electrical conductivity of the composite material.
ZFJ thanks the support of Project of Natural Science Foundation of China (Grant No. 51775282), Shan Dong Province Nature Science Foundation (Grant ZR2017MEM019) and Open Project of State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, China (LSL-1504). FR would like to knowledge the financial support from the Temple University faculty startup fund.
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