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Title: Facile diamond synthesis from lower diamondoids

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [4];  [5]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [1]; ORCiD logo [4];  [3];  [1]; ORCiD logo [4]
  1. Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  2. Stanford Univ., CA (United States); Center for High Pressure Science and Technology Advanced Research, Beijing (China)
  3. Stanford Univ., CA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
  5. Center for High Pressure Science and Technology Advanced Research, Beijing (China)
  6. Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS)
  7. Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS); Soreq Nuclear Research Center, Yavne (Israel)

Carbon-based nanomaterials have exceptional properties that make them attractive for a variety of technological applications. Here, we report on the use of diamondoids (diamond-like, saturated hydrocarbons) as promising precursors for laser-induced high-pressure, high-temperature diamond synthesis. The lowest pressure and temperature $(P-T)$ conditions that yielded diamond were 12 GPa (at ~2000 K) and 900 K (at ~20 GPa), respectively. This represents a substantially reduced transformation barrier compared with diamond synthesis from conventional (hydro)carbon allotropes, owing to the similarities in the structure and full sp3hybridization of diamondoids and bulk diamond. At 20 GPa, diamondoid-to-diamond conversion occurs rapidly within <19 μs. Molecular dynamics simulations indicate that once dehydrogenated, the remaining diamondoid carbon cages reconstruct themselves into diamond-like structures at high $P-T$. This study is the first successful mapping of the $P-T$ conditions and onset timing of the diamondoid-to-diamond conversion and elucidates the physical and chemical factors that facilitate diamond synthesis.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515; FG02-94ER14466; EAR-1634415; AC02-06CH11357; AC02-05CH11231
OSTI ID:
1574721
Journal Information:
Science Advances, Vol. 6, Issue 8; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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