The structural response of graphene on copper to surface- and interfacial-oxygen

Wahab, Hud; Haverkamp, Richard G.; Kim, J.H.; Cadogan, J. M.; Mertins, H.-Ch.; Choi, Suk‐Ho; Timmers, H.

doi:10.1016/j.carbon.2016.09.028

Cited by 8 publications

(2 citation statements)

References 40 publications

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“…However, these graphene materials for composite applications possess defects and oxygen-containing functional groups (OCFGs) introduced from raw materials or the preparation process, which would make them more reactive than perfect graphene and thus impacts the interfacial structure and bonding state between graphene and metals remarkably . During the high-temperature fabrication process of MMCs, the activated oxygen atoms obtaining energy from Joule heat are driven out of the graphene surface and move toward the interface and even possibly diffuse into the metal bulk as a result of differential oxygen concentration between metal and graphene . In the meantime, the local stress resulting from the restriction of matrix plastic deformation by the graphene reinforcement also makes the interfacial condition even more complex. − To clarify the interfacial bonding between these “defected graphene” and metal matrix, a comprehensive consideration of the existence type and formation mechanisms of the defects and oxygen element in the graphene and their potential interfacial reaction is very necessary.…”

Section: Introductionmentioning

confidence: 99%

Effect of Interface Structure on the Mechanical Properties of Graphene Nanosheets Reinforced Copper Matrix Composites

Zhang

Shi

Liu

et al. 2018

ACS Appl. Mater. Interfaces

113

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Currently, seldom studies have paid close attention to the impact of the defects and oxygen-containing functional groups on the surface of the graphene for composite applications. In this work, two typical graphene materials, namely graphene nanosheets synthesized by an in situ catalytic reaction and reduced graphene oxide (RGO), were adopted to fabricate reinforced copper matrix composites by spark plasma sintering. A harmful transitional interfacial layer made up of Cu/CuOx/amorphous carbon/RGO, resulted from interfacial reaction between Cu and RGO, were observed in the RGO/Cu composite. In contrast, the in situ synthesized graphene with fewer defect and lower oxygen level can realize clean graphene−Cu interface with Cu−O− C bonding and thus lead to much improved interface bonding and superior yield strength and tensile ductility. These results imply that the in situ synthesized graphene is more favorable for achievement of robust interfacial bonding for enhancing the mechanical properties of the graphene-Cu composites.

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Section: Introductionmentioning

confidence: 99%

Effect of Interface Structure on the Mechanical Properties of Graphene Nanosheets Reinforced Copper Matrix Composites

Zhang

Shi

Liu

et al. 2018

ACS Appl. Mater. Interfaces

113

View full text Add to dashboard Cite

show abstract

“…Minor contaminations revealed by weak O 1s (core level in Figure S1 , Supporting Information) line in the XPS spectrum (obtained without vacuum sample annealing) were analyzed by the near edge X‐ray absorption fine structure (NEXAFS) spectroscopy. [ 40 ] These trace contaminants of various carbon bonds (regions marked by dashed rectangles in Figure 2c,d ) can be removed by a 300 °C annealing in ultra‐high vacuum conditions. Remarkably, Cu L 2,3 ‐edge signal (Figure 2e ), indicative of pure metallic copper [ 41 ] only weakly interacting with graphene, does not change during annealing.…”

Section: Resultsmentioning

confidence: 99%

High‐Quality Graphene Using Boudouard Reaction

et al. 2022

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Following the game‐changing high‐pressure CO (HiPco) process that established the first facile route toward large‐scale production of single‐walled carbon nanotubes, CO synthesis of cm‐sized graphene crystals of ultra‐high purity grown during tens of minutes is proposed. The Boudouard reaction serves for the first time to produce individual monolayer structures on the surface of a metal catalyst, thereby providing a chemical vapor deposition technique free from molecular and atomic hydrogen as well as vacuum conditions. This approach facilitates inhibition of the graphene nucleation from the CO/CO 2 mixture and maintains a high growth rate of graphene seeds reaching large‐scale monocrystals. Unique features of the Boudouard reaction coupled with CO‐driven catalyst engineering ensure not only suppression of the second layer growth but also provide a simple and reliable technique for surface cleaning. Aside from being a novel carbon source, carbon monoxide ensures peculiar modification of catalyst and in general opens avenues for breakthrough graphene‐catalyst composite production.

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In Situ Synthesis of 3D Interconnected Graphene-Reinforced Copper Composites

Chen

et al. 2019

J. of Materi Eng and Perform

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The structural response of graphene on copper to surface- and interfacial-oxygen

Cited by 8 publications

References 40 publications

Effect of Interface Structure on the Mechanical Properties of Graphene Nanosheets Reinforced Copper Matrix Composites

Effect of Interface Structure on the Mechanical Properties of Graphene Nanosheets Reinforced Copper Matrix Composites

High‐Quality Graphene Using Boudouard Reaction

In Situ Synthesis of 3D Interconnected Graphene-Reinforced Copper Composites

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