AI Article Synopsis
- Helium attaches to carbon structures C(60)(+) and C(70)(+), displaying behaviors similar to its interaction with graphite.
- Mass spectrometry indicates that a stable arrangement of helium occurs when hexagons and pentagons on the carbon cages are filled, but a full shell forms only after 60 helium atoms for C(60)(+) or 62 for C(70)(+).
- Simulations at 4 K reveal that the solid phase of C(60)He(n)(+) allows for displacement of helium atoms from pentagonal sites, resulting in a mix of fixed and mobile atoms.
Article Abstract
Helium adsorbed on C(60)(+) and C(70)(+) exhibits phenomena akin to helium on graphite. Mass spectra suggest that commensurate layers form when all carbon hexagons and pentagons are occupied by one He each, but that the solvation shell does not close until 60 He atoms are adsorbed on C(60)(+), or 62 on C(70)(+). Molecular dynamics simulations of C(60)He(n)(+) at 4 K show that the commensurate phase is solid. Helium added to C(60)He(32)(+) will displace some atoms from pentagonal sites, leading to coexistence of a registered layer of immobile atoms interlaced with a nonregistered layer of mobile atoms.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.108.076101 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!