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Ambient synthesis of diamond in saline alcohol

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2024, 34(2), pp.657-663
  • DOI : 10.1007/s42823-023-00656-3
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : May 23, 2023
  • Accepted : December 22, 2023
  • Published : March 28, 2024

Chen You-Hu 1 Tang Jie 1 Qin Lu-Chang 2

1National Institute for Materials Science
2Department of Physics and Astronomy, University of North Carolina at Chapel Hill

Accredited

ABSTRACT

We report a simple benchtop method to synthesize diamonds from ethyl alcohol (C2H6O) at ambient pressure and room temperature via solvothermal reactions in a liquid solution of table salt (NaCl) and their structural characterization using electron diffraction and high-resolution electron microscopy. In addition to the usual cubic phase of diamond, the hexagonal phase of diamond (lonsdaleite) has also been obtained and identified unambiguously. Many of the synthesized diamonds often contain structural defects including twinnings, stacking faults, and dislocations. The formation and growth of diamond under ambient conditions provide further insights into understanding of the natural existence of diamond on Earth as well as in outer space. While only nanometric diamonds have been observed in the present study, we believe this discovery will open up new ways that have long been sought to grow diamonds, including large size diamonds, in organic solutions at ambient conditions.

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