Author/Authors :
Bopp، نويسنده , , M.A. and Meixner، نويسنده , , A.J. and Tarrach، نويسنده , , G. and Zschokke-Grنnacher، نويسنده , , I. and Novotny، نويسنده , , L.، نويسنده ,
Abstract :
The time evolution of the microscopic lateral diffusion and dynamic reorientation of individual dye molecules dispersed in a thin polymer film is probed by means of scanning near-field optical microscopy at room temperature and ambient conditions. On a sub-micrometer scale we identify regions where the diffusion is drastically non-random, while the statistical average of the trajectories of 97 molecules in a 4 μm × 4 μm section displays random-walk behavior.
