A graphene sheet is well known to be highly stable against chemisorption of a single hydrogen atom, since a puckered sp3 hybridized site heavily distorts the surrounding sp2 framework. However, successive adjacent chemisorbed hydrogen atoms can engage in a collective stabilization mediated by cooperative alternate puckering in the underlying carbon sheet. After several chemisorbed atoms, the binding energy for further adsorption changes sign and becomes favorable. This process requires access to both sides of the graphene sheet. Therefore it is suppressed on a graphite surface, but may be accessible in carbon nanotubes, if the initial kinetic barrier to creating the nucleation island can be overcome.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Nov 15 2003|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics