TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Greenwood, Thomas
A1  - AlSalem, Huda
A1  - Köhler, Sven P. K.
T1  - Velocity-Selected Rotational State Distributions of Nitric Oxide Scattered off Graphene Revealed by Surface-Velocity Map Imaging
JF  - The Journal of Physical Chemistry A
N2  - We report velocity-dependent internal energy distributions of nitric oxide molecules, NO, scattered off graphene supported on gold to further explore the dynamics of the collision process between NO radicals and graphene. These experiments were performed by directing a molecular beam of NO onto graphene in a surface-velocity map imaging setup, which allowed us to record internal energy distributions of the NO radicals as a function of their velocity. We do not observe bond formation but (1) major contributions from direct inelastic scattering and (2) a smaller trapping–desorption component where some physisorbed NO molecules have residence times on the order of microseconds. This is in agreement with our classical molecular dynamics simulations which also observe a small proportion of two- and multi-bounce collisions events but likewise a small proportion of NO radicals trapped at the surface for the entire length of the molecular dynamics simulations (a few picoseconds). Despite a collision energy of 0.31 eV, which would be sufficient to populate NO(v = 1), we do not detect vibrationally excited nitric oxide.
KW  - Collisions
KW  - Energy
KW  - Molecules
KW  - Scattering
KW  - Two dimensional materials
Y1  - 2023
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:960-opus4-24503
U6  - https://doi.org/10.25968/opus-2450
DO  - https://doi.org/10.25968/opus-2450
VL  - 127
IS  - 5
SP  - 1124
EP  - 1129
ER  -