Atomic-scale identification of nitrogen dopants in graphene on Ir(111) and Ru(0001)

Nitrogen (N) doped graphene materials have been synthesized using the sole precursor adenine on the Ir(111) and Ru(0001) surfaces. X-ray photoelectron spectroscopy and scanning tunneling microscopy (STM) have been used to characterize the obtained N-doped graphene materials. Several graphitic and pyridinic N dopants have been identified on the atomic scale by combining STM measurements and STM simulations based on density functional theory calculations.

Automated summary

N-doped graphene materials were synthesized using adenine as the sole precursor on Ir(111) and Ru(0001) surfaces. X-ray photoelectron spectroscopy and scanning tunneling microscopy (STM) were used to characterize the obtained materials. The presence of graphitic and pyridinic N dopants on the atomic scale was confirmed by STM measurements and simulations based on density functional theory calculations.