Properties of graphene produced by the high pressure–high temperature growth process

Properties of graphene produced by the high pressure–high temperature growth process

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The authors report on a new method for the synthesis of graphene, a mono-layer of carbon atoms arranged in a honey comb lattice, and the assessment of the properties of obtained graphene layers using micro-Raman characterisation. Graphene was produced by a high pressure–high temperature (HPHT) growth process from the natural graphitic source material by utilising the molten Fe–Ni catalysts for dissolution of carbon. The resulting large-area graphene flakes were transferred to the silicon–silicon oxide substrates for the spectroscopic micro-Raman and scanning electron microscopy inspection. The analysis of the G peak, D, T+D and 2D bands in the Raman spectra under the 488 nm laser excitation indicate that the HPHT technique is capable of producing high-quality large-area single-layer graphene with a low defect density. The disorder-induced D peak ∼1359 cm−1 while very strong in the initial graphitic material is completely absent in the graphene layers. The proposed method may lead to a more reliable graphene synthesis and facilitate its purification and chemical doping.


    1. 1)
    2. 2)
    3. 3)
    4. 4)
      • Phase-coherent transport in graphene quantum billiards
    5. 5)
      • The rise of graphene
    6. 6)
      • The electronic properties of graphene
    7. 7)
    8. 8)
    9. 9)
      • Gate-tunable graphene spin valve
    10. 10)
      • Elementary building blocks of graphene-nanoribbon-based electronic devices
    11. 11)
      • Superior thermal conductivity of single-layer graphene
    12. 12)
    13. 13)
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    15. 15)
    16. 16)
      • Direct conversion of graphite to diamond in static pressure apparatus
    17. 17)
      • Use of the ‘split sphere’ apparatus for growing large diamond crystals without the use of a hydraulic press
    18. 18)
    19. 19)
    20. 20)
      • Raman scattering from high-frequency phonons in supported n-graphene layer films
    21. 21)
      • Temperature dependence of the Raman spectra of graphene and graphene multilayers
    22. 22)
      • Variable temperature Raman microscopy as a nanometrology tool for graphene layers and graphene-based devices
    23. 23)
      • Graphene-on-sapphire and graphene-on-glass: Raman spectroscopy study
    24. 24)
      • J. Phys. C.
    25. 25)
    26. 26)
      • Temperature-dependent Raman spectra and anomalous Raman phenomenon of high oriented pyrolytic graphite
    27. 27)
      • Raman scattering of non-planar graphite: arched edges
    28. 28)
      • Double resonant Raman scattering in graphite
    29. 29)
    30. 30)
      • Thermal contact resistance and thermal conductivity of a carbon nanofiber
    31. 31)
    32. 32)
    33. 33)
      • Thermal conduction in AlGaN alloys and thin films
    34. 34)
    35. 35)

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