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Room-temperature graphitization in a solid-phase reaction

Elnobi, Sahar and Sharma, Subash and Ibrahim Araby, Mona and Paudel, Balaram and Kalita, Golap and Mohd. Yusop, Mohd. Zamri and Ayhand, Muhammed Emre and Tanemura, Masaki (2019) Room-temperature graphitization in a solid-phase reaction. RSC Advances, 10 (2). pp. 914-922. ISSN 2046-2069


Official URL: http://dx.doi.org/10.1039/c9ra09038j


Graphitized carbon including graphene has recently become one of the most investigated advanced materials for future device applications, but a prerequisite for broadening its range of applications is to lower its growth temperature. Here we report a great decrease in graphitization temperature using the well-known catalyst Ni. Amorphous carbon films with Ni nanoparticles (NPs) were deposited, using a simple one-step magnetron sputtering method, onto microgrids and a SiO2/Si substrate for transmission electron microscopy (TEM) and Raman spectroscopy analyses, respectively. The amorphous carbon surroundings and locations between the Ni NPs started to become graphitized during the film deposition even at room temperature (RT) and 50 °C. The graphitization was confirmed by both high-resolution TEM (HR-TEM) and Raman 2D peak analyses. The increase in the relative amount of Ni in the amorphous carbon film led to the partial oxidation of the larger Ni NPs, resulting in less graphitization even at an elevated deposition temperature. Based on the detailed HR-TEM analyses, a decreased oxidation of NPs and enhanced solubility of carbon into Ni NPs were believed to be key for achieving low-temperature graphitization.

Item Type:Article
Uncontrolled Keywords:graphitization, room temperature
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:90893
Deposited By: Widya Wahid
Deposited On:31 May 2021 21:28
Last Modified:31 May 2021 21:28

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