N-doped graphene-based copper nanocomposite with ultralow electrical resistivity and high thermal conductivity

Abstract

Nanocomposite with a room-temperature ultra-low resistivity far below that of conventional metals like copper is considered as the next generation conductor. However, many technical and scientific problems are encountered in the fabrication of such nanocomposite materials at present. Here, we report the rapid and efficient fabrication and characterization of a novel nitrogen-doped graphene-copper nanocomposite. Silk fibroin was used as a precursor and placed on a copper substrate, followed by the microwave plasma treatment. This resulted nitrogen-doped graphene-copper composite possesses an electrical resistivity of 0.16 µΩ·cm at room temperature, far lower than that of copper. In addition, the composite has superior thermal conductivity (538 W/m·K at 25 °C) which is 138% of copper. The combination of excellent thermal conductivity and ultra-low electrical resistivity opens up potentials in next-generation conductors.

A powder-metallurgy-based strategy toward three-dimensional graphene-like network for reinforcing copper matrix composites

“…Thus the TC of 3D-GLNN could be predicted as about 450-500 W m −1 K −1 based on the experimental work by Malekpour et al 44 . In view of the similar continuous and multi-layer feature of graphene, this value matches well with the reported data of graphene film/Cu system (445-538 W m −1 K −1 ) [45][46][47] . Restricted by the annealing temperature of 800°C in the RTA step, the crystallinity and the intrinsic TC value of GLNs still have much room for improvement on the condition that an optimized GLNs growth procedures, such as plasma-enhanced chemical vapor deposition, could be achieved.…”

Ultra-highly fluorescent N doped carbon dots-CdTe QDs nanohybrids with excitation-independent emission in the blue-violet region

“…The nanosheets play a critical role in the electron transfer due to their ultra-high electrical conductivity. 55 In this study, a QY of $84% was obtained for the CdTe/N-CDs synthesized with a mixture of CdTe QDs and silk broin (SF) with a volume ratio of 1 : 1. The inuences of the ratio of SF and CdTe QDs in the starting materials on the PL properties of the nal sample are summarized in the ESI (see Fig.…”

Aligned graphene/silk fibroin conductive fibrous scaffolds for guiding neurite outgrowth in rat spinal cord neurons

“…Silk fibroin (SF), the natural polymer material, is a well‐known biocompatible material, which possesses adaptable biodegradability, stable mechanical properties, ease of preparation and modification, various presentations, and so on (Altman et al, 2003; Liu et al, 2011; Liu, Li, Zhou, Fan, & Fan, 2011; Zhou et al, 2018). In previous studies, the hybrid application of graphene and SF exhibited varying improvements in electrical conductivity, mechanical strength, thermal stability, and cytocompatibility (Zhang et al, 2019; Zheng et al, 2018). Thus, the desired conductive composite scaffold made of graphene and SF extended the application in neural tissue engineering and biosensors (Zhang, Wang, Wang, Jian, & Zhang, 2016).…”