Synthesis of Graphene-Diamond Hybrid Using Plasma-Enhanced Chemical Vapor Deposition | ||||
| Egyptian Journal of Chemistry | ||||
| Volume 68, Issue 11, November 2025, Page 153-163 PDF (390.36 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2025.346693.11029 | ||||
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| Authors | ||||
Diaa Ibrahim  1; Abdu Garamoon2; Farouk Elaksher2; Ashraf F. El-Sherif3; Wafaa Soliman4; Mansour ElSabbagh2, 5
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| 1Egyptian Academy for Engineering and Advanced Technology,Cairo,,Egypt | ||||
| 2Physics Department, Faculty of Science (male), Al-Azhar University,Cairo, Egypt | ||||
| 3Faculty of Engineering, Ahram Canadian University (ACU), Giza, Egypt | ||||
| 4Department of Laser Sciences and Interactions, National Institute of Laser Enhanced Sciences (N.I.L.E.S), Cairo University, Giza,12613, Egypt | ||||
| 5Center of Plasma Technology, Al-Azhar University,Cairo, Egypt | ||||
| Abstract | ||||
| A homemade Plasma-Enhanced Chemical Vapor Deposition (PECVD) system was developed to synthesize a graphene-diamond hybrid material using Radio Frequency Capacitively Coupled Plasma (RF-CCP) under high-pressure discharge conditions. This study stands out by operating RF-CCP at elevated pressures (200 and 700 mbar), an unconventional regime for this type of plasma, leading to unique dynamics in methane dissociation and reactive species formation. Optical Emission Spectroscopy (OES) identified key plasma species and predicted critical chemical pathways governing hybrid material growth. The high-energy plasma environment effectively dissociated methane, breaking its strong molecular bonds and generating reactive species such as CH and C₂, which facilitated the simultaneous deposition of sp²-hybridized graphene and sp³-hybridized diamond structures. This study demonstrates the synthesis of a graphene-diamond hybrid material using RF-CCP at high pressure, Enabling precise control over its formation. Structural characterization via X-ray Diffraction (XRD), Raman spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), and Transmission Electron Microscopy (TEM) confirmed the coexistence of graphene and diamond phases. The findings suggest that CH and C₂ species played a crucial role in material formation, offering a new strategy for designing hybrid carbon materials | ||||
| Keywords | ||||
| Graphene-diamond hybrid; Optical emission Spectroscopy; Plasma-Enhanced Chemical Vapor Deposition; Plasma chemistry; Raman spectroscopy | ||||
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