TY - JOUR
T1 - Collective stabilization of hydrogen chemisorption on graphenic surfaces
AU - Stojkovic, Dragan
AU - Zhang, Peihong
AU - Lammert, Paul
AU - Crespi, Vincent
PY - 2003/11/15
Y1 - 2003/11/15
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.68.195406
DO - 10.1103/PhysRevB.68.195406
M3 - Article
AN - SCOPUS:10444230148
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 19
ER -