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Title: Nanocarbon synthesis by high-temperature oxidation of nanoparticles

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep24109· OSTI ID:1307566
 [1];  [1];  [2];  [1];  [1];  [1];  [3];  [4];  [1]
  1. Univ. of Southern California, Los Angeles, CA (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Univ. of Southern California, Los Angeles, CA (United States); Kumamoto Univ., Kumamoto (Japan); Kobe Univ., Kobe (Japan)
  4. Kumamoto Univ., Kumamoto (Japan)

High-temperature oxidation of silicon-carbide nanoparticles (nSiC) underlies a wide range of technologies from high-power electronic switches for efficient electrical grid and thermal protection of space vehicles to self-healing ceramic nanocomposites. Here, multimillion-atom reactive molecular dynamics simulations validated by ab initio quantum molecular dynamics simulations predict unexpected condensation of large graphene flakes during high-temperature oxidation of nSiC. Initial oxidation produces a molten silica shell that acts as an autocatalytic ‘nanoreactor’ by actively transporting oxygen reactants while protecting the nanocarbon product from harsh oxidizing environment. Percolation transition produces porous nanocarbon with fractal geometry, which consists of mostly sp2 carbons with pentagonal and heptagonal defects. Furthermore, this work suggests a simple synthetic pathway to high surface-area, low-density nanocarbon with numerous energy, biomedical and mechanical-metamaterial applications, including the reinforcement of self-healing composites.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Argonne National Laboratory - Argonne Leadership Computing Facility; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1307566
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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