Study of surface-molecule interactions using nuclear resonance photon scattering

Moreh, R.

doi:10.1007/bf00324002

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Comparison With Other Systems1

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1996

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“…16 For adsorbed gases such as N 2 and N 2 O on Grafoil, a similar measurement at 12 K, using the NRPS technique, 2,15 yielded ʈ / Ќ ϭ1.64 and 1.32, respectively, which showed that the adsorbed N 2 and N 2 O molecules lay very nearly parallel to the graphite planes and hence the behavior of the latter molecules differs markedly from that of the present work. Furthermore, while the average tilt of the N 2 molecules increased relatively quickly with T, the tilt of the N 2 O molecules remained almost stable between 12 and 250 K.…”

Section: Comparison With Other Systemscontrasting

confidence: 66%

NO2adsorption on Grafoil between 297 and 12 K

1996

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The NO 2 adsorption on Grafoil was studied using the nuclear resonance photon scattering technique. By measuring the scattering cross section of the 6324-keV ␥ line from 15 N, it was possible to determine beyond any doubt that NO 2 is adsorbed as a dimer, N 2 O 4 , on graphite. The scattered intensity ratio from the adsorbing Grafoil sample with the beam parallel and perpendicular to the graphite planes was also measured as a function of T. This yielded the tilt angle of the N 2 O 4 molecular plane which was found to be normal to the graphite planes with the NvN bond normal to the same planes. This tilt angle seems to be considerably stable between 12 and 300 K. ͓S0163-1829͑96͒01120-4͔

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Section: Comparison With Other Systemscontrasting

confidence: 66%