Copper–CNT interfacing with Cu-doped polydopamine in CNT carpet: copper nucleation and resistance decrease upon soft annealing

Abstract

The annealing of carpets of CNT coated with Cu-doped polydopamine lowers the carpets sheet resistance and induces the reduction of Cu ions into metallic Cu particles nucleating at the CNT surface.

On the resistivity, temperature coefficient of resistance, and ampacity of Cu–CNT and Ni–CNT composites

“…4) as expected for large diameter MWCNT 6,7,21 and has a similar value independent of the coating or compression steps. Compared to the TCR of carpets containing oxidized CNT with a length of 200 mm and a diameter of 80-90 nm (see our previous paper 21 ), we nd here a similar TCR in our oxidized CNT systems (800 mm, 80-90 nm), suggesting that the variation of the CNT length does not drastically affect the TCR. Furthermore, in our previous paper, we also observed that the TCR of CNT coated with Cu-doped Pda was lower than un-coated CNT.…”

“…In our previous work, 21 we used XPS to evidence the presence of the Cu-doped Pda on our CNT aer a similar coating protocol. Here, Cu and Ni were directly conrmed by EDX (Fig.…”

“…The MWCNT treatment was inspired by the protocol used in our preceding work. 21 CNT (300 mg) were oxidized in a sonication bath in 150 mL of nitric acid (52%) for 30 min (at room temperature). They were then ltrated and rinsed with DI water using a vacuum ltration system.…”

“…6,7,9 Hence, in this paper, we propose to investigate a Cu-NT composite comprising long and large MWCNT (L ¼ 800 mmø ¼ 80-90 nm). Following our precedent experiments proposing Cu-doped polydopamine to interface efficiently Cu and CNT, 21 we present a novel method for fabricating Cu-CNT composites with high CNT vol% (i.e. $42%) by electroplating in aqueous solution.…”

N-type silver ammonia-polyethyleneimine/single-walled carbon nanotube composite films with enhanced thermoelectric properties

“…For SWCNTs, the C1s and O1s peaks were located at 284.8 eV and 532.3 eV, respectively. 38 For PEI/SWCNT, in addition, the C1s (285.1 eV) and O1s (532.1 eV) peaks, a new peak at 399.9 eV is ascribed to N1s. For [Ag(NH 3 ) 2 ] + -PEI/SWCNT-2, the N1s peak was red-shifted from 399.9 eV to 399.3 eV, which might be ascribed to the interaction between silver ammonia and PEI.…”