Chemical modification of graphene via hyperthermal molecular reaction

 

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Detalles Bibliográficos
Autores: Dubey, Girjesh, Urcuyo Solórzano, Roberto, Abb, Sabine, Rinke, Gordon, Burghard, Marko, Rauschenbach, Stephan, Kern, Klaus
Formato: artículo original
Fecha de Publicación:2014
Descripción:Chemical functionalization of graphene is achieved by hyperthermal reaction with azopyridine molecular ions. The one-step, room temperature process takes place in high vacuum (10–7 mbar) using an electrospray ion beam deposition (ES-IBD) setup. For ion surface collisions exceeding a threshold kinetic energy of 165 eV, molecular cation beams of 4,4′-azobis(pyridine) covalently attach to chemical vapor deposited (CVD) graphene. A covalent functionalization degree of 3% of the carbon atoms of graphene is reached after 3–5 h of ion exposure of 2 × 1014 azopyridinium/cm2 of which 50% bind covalently. This facile approach for the controlled modification of graphene extends the scope of candidate species that would not otherwise react via existing conventional methods.
País:Kérwá
Institución:Universidad de Costa Rica
Repositorio:Kérwá
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/86056
Acceso en línea:https://pubs.acs.org/doi/abs/10.1021/ja5046499
https://hdl.handle.net/10669/86056
Palabra clave:Chemical
Hyperthermal
Molecular reaction