Nonequilibrium Route to Nanodiamond with Astrophysical Implications
Nanometer-sized diamond grains are commonly found in primitive chondritic meteorites, but their origin is puzzling. Using evidence from atomistic simulation, we establish a mechanism by which nanodiamonds form abundantly in space in a two-stage process involving condensation of vapor to form carbon...
| Main Authors: | , , |
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| Format: | Journal Article |
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The American Physical Society
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/39826 |
| _version_ | 1848755699166740480 |
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| author | Marks, Nigel Lattemann, M. McKenzie, D. |
| author_facet | Marks, Nigel Lattemann, M. McKenzie, D. |
| author_sort | Marks, Nigel |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Nanometer-sized diamond grains are commonly found in primitive chondritic meteorites, but their origin is puzzling. Using evidence from atomistic simulation, we establish a mechanism by which nanodiamonds form abundantly in space in a two-stage process involving condensation of vapor to form carbon onions followed by transformation to nanodiamond in an energetic impact. This nonequilibrium process is consistent with common environments in space and invokes the fewest assumptions of any proposed model. Accordingly, our model can explain nanodiamond formation in both presolar and solar environments. The model provides an attractive framework for understanding noble gas incorporation and explains all key features of meteoritic nanodiamond, including size, shape, and polytype. By understanding the creation of nanodiamonds, new opportunities arise for their exploitation as a powerful astrophysical probe. |
| first_indexed | 2025-11-14T09:00:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-39826 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:00:27Z |
| publishDate | 2012 |
| publisher | The American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-398262017-09-13T15:52:03Z Nonequilibrium Route to Nanodiamond with Astrophysical Implications Marks, Nigel Lattemann, M. McKenzie, D. Nanometer-sized diamond grains are commonly found in primitive chondritic meteorites, but their origin is puzzling. Using evidence from atomistic simulation, we establish a mechanism by which nanodiamonds form abundantly in space in a two-stage process involving condensation of vapor to form carbon onions followed by transformation to nanodiamond in an energetic impact. This nonequilibrium process is consistent with common environments in space and invokes the fewest assumptions of any proposed model. Accordingly, our model can explain nanodiamond formation in both presolar and solar environments. The model provides an attractive framework for understanding noble gas incorporation and explains all key features of meteoritic nanodiamond, including size, shape, and polytype. By understanding the creation of nanodiamonds, new opportunities arise for their exploitation as a powerful astrophysical probe. 2012 Journal Article http://hdl.handle.net/20.500.11937/39826 10.1103/PhysRevLett.108.075503 The American Physical Society restricted |
| spellingShingle | Marks, Nigel Lattemann, M. McKenzie, D. Nonequilibrium Route to Nanodiamond with Astrophysical Implications |
| title | Nonequilibrium Route to Nanodiamond with Astrophysical Implications |
| title_full | Nonequilibrium Route to Nanodiamond with Astrophysical Implications |
| title_fullStr | Nonequilibrium Route to Nanodiamond with Astrophysical Implications |
| title_full_unstemmed | Nonequilibrium Route to Nanodiamond with Astrophysical Implications |
| title_short | Nonequilibrium Route to Nanodiamond with Astrophysical Implications |
| title_sort | nonequilibrium route to nanodiamond with astrophysical implications |
| url | http://hdl.handle.net/20.500.11937/39826 |