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Fabrication and growth mechanism of ultra-crystalline C60 on silicon substrate in vacuum

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(2), pp.315-322
  • DOI : 10.1007/s42823-020-00167-5
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : June 13, 2020
  • Accepted : July 13, 2020
  • Published : April 1, 2021

Wang Hongyu 1 Rath Ashutosh 1 Yu Shu Hearn 1 Tan Meng Seng 1 Pennycook Stephen J. 1 Chua Daniel H. C. 1

1Department of Material Science and Engineering, National University of Singapore

Accredited

ABSTRACT

We report a simple procedure to fabricate single crystals 3D C60 having an FCC structure on silicon substrates using a vapour–solid set-up in vacuum conditions. The morphology of the deposited film can be tuned by controlling the temperature and position of the substrate. The as-fabricated samples are extensively characterised by transmission electron microscopy, scanning electron microscope, X-ray powder diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy and nano-indentation, which allow us to shed light on the recrystallization process of the C60. In addition, the growth mechanism of the formation of crystalline 3D structure of the C60 film is discussed in detail. Based on the newly gained knowledge of mechanism and its unique properties, fullerene has shown huge potential as a solid lubricant on various kinds of substrates.

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