Abstract
Results of an in situ conduction ESR (CESR) study of HNO3 molecule intercalation into narrow highly oriented pyrolytic graphite (HOPG) slabs are presented. The changes in the graphite CESR signal line shape, intensity and linewidth and the step-wise changes both of intensity and linewidth of the CESR signal from the intercalated sample have been clearly detected during this reaction. Under the assumption that the graphite CESR signal evolution is caused by the advance of a boundary separating the intercalated and non-intercalated HOPG, the constant of two-dimensional diffusion of nitric acid molecules into HOPG and the average value of the spin reorientation probability during the collision of current carriers with this interface have been extracted from the experimental data.
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