Chemical Modification of Graphene via Hyperthermal Molecular Reaction

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 35 h of ion exposure of 2 X 10(14) azopyridinium/cm(2) 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.


Published in:
Journal Of The American Chemical Society, 136, 39, 13482-13485
Year:
2014
Publisher:
Washington, Amer Chemical Soc
ISSN:
0002-7863
Laboratories:




 Record created 2014-11-13, last modified 2018-01-28


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