Investigation on the Graphitization Process of Amorphous Carbon for HAMR by Molecular Dynamics Simulation

Liu, Qingkang; Li, Longqiu; Zhang, Hongtao; Huang, Qitao; Zhang, Guangyu; Zhen-xiu, Hou

doi:10.1109/tmag.2016.2626344

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…The spectra extracted from the wear tracks as well as the outcomes of multivariate analysis clearly indicate the tribologically induced generation of a surface layer containing a higher fraction of disordered sp 2 C–C bonds together with the presence of a gradient in sp 2 carbon concentration as a function of depth from the sample surface (fraction of sp 2 carbon increasing in the outermost regions). This finding agrees with our previous study and with the outcomes of simulations/experiments performed using self-mated diamond contacts, or hydrogenated or hydrogen-free amorphous carbon contacts. ,,,− …”

Section: Discussionsupporting

confidence: 92%

How Hydrogen and Oxygen Vapor Affect the Tribochemistry of Silicon- and Oxygen-Containing Hydrogenated Amorphous Carbon under Low-Friction Conditions: A Study Combining X-ray Absorption Spectromicroscopy and Data Science Methods

Mangolini

Koshigan

Benthem

et al. 2021

ACS Appl. Mater. Interfaces

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Section: Discussionsupporting

confidence: 92%

How Hydrogen and Oxygen Vapor Affect the Tribochemistry of Silicon- and Oxygen-Containing Hydrogenated Amorphous Carbon under Low-Friction Conditions: A Study Combining X-ray Absorption Spectromicroscopy and Data Science Methods

Mangolini

Koshigan

Benthem

et al. 2021

ACS Appl. Mater. Interfaces

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Enhancing Graphene Growth in Carbon Ultrathin Films by Tuning the Ion Kinetic Energy During Film Deposition onto a Catalyst Sublayer

Baboukani,

Ye,

Komvopoulos

2024

J. Phys. Chem. C

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A one-step metal-catalyzed process for transforming carbon films into high-quality graphene layers for potential use in various cutting-edge technologies was developed in this study. Carbon ultrathin films grown on CoFe alloy ultrathin sublayers by filtered cathodic vacuum arc using different ion kinetic energies were subjected to thermal annealing at 650 °C for 150 s. X-ray photoelectron spectroscopy, Raman spectroscopy, and molecular dynamics simulations provided insight into phase changes and graphenization at the molecular level. Atomic force microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy were used to characterize the surface morphology and elemental composition of the C films and the CoFe sublayer before and after thermal annealing. It was found that increasing the C+ ion kinetic energy during C film deposition enhanced graphenization; however, a very high ion kinetic energy had the opposite effect. The sp3/sp2 ratio in the as-deposited C films played a critical role in graphene formation during thermal annealing. Contrary to amorphization, graphenization involved a three-step process encompassing the sequential transformation of high sp3 C to low sp3 C, low sp3 C to graphite, and, last, graphite to nanocrystalline graphite. Variations in the C+ ion kinetic energy indirectly affected the dependence of graphene growth on the hybridization state of the as-deposited C films, the carbon concentration in the CoFe sublayer, and the stability and uniformity of the catalyst CoFe sublayer during thermal annealing, in this manner influencing the overall metal-catalyzed C graphenization process.

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Molecular Dynamic Simulation on Combustion Process of Silicon-Doped Amorphous Carbon Film for Heat-Assisted Magnetic Recording

Liu

Shuai

2018

2018 Asia-Pacific Magnetic Recording Conference (APMRC)

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Investigation on the Graphitization Process of Amorphous Carbon for HAMR by Molecular Dynamics Simulation

Cited by 5 publications

References 25 publications

How Hydrogen and Oxygen Vapor Affect the Tribochemistry of Silicon- and Oxygen-Containing Hydrogenated Amorphous Carbon under Low-Friction Conditions: A Study Combining X-ray Absorption Spectromicroscopy and Data Science Methods

How Hydrogen and Oxygen Vapor Affect the Tribochemistry of Silicon- and Oxygen-Containing Hydrogenated Amorphous Carbon under Low-Friction Conditions: A Study Combining X-ray Absorption Spectromicroscopy and Data Science Methods

Enhancing Graphene Growth in Carbon Ultrathin Films by Tuning the Ion Kinetic Energy During Film Deposition onto a Catalyst Sublayer

Molecular Dynamic Simulation on Combustion Process of Silicon-Doped Amorphous Carbon Film for Heat-Assisted Magnetic Recording

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