CORRELATIVE NEAR-FIELD DIRECT FLUORESCENCE IMAGING AND SPECTROSCOPY OF A SENSITIZING DYE ON SINGLE MICROCRYSTALS OF SILVER-HALIDE/

Correlative imaging of single tabular grains of silver bromide is perf ormed, using a force-regulated near-field scanning optical microscope. The topography and fluorescence images of samples of a sensitizing dy e on a glass substrate and on silver bromide grains, showing a spatial ly nonuniform fluorescence signal, are also presented. Near-field fluo rescence spectra of the dye, taken at a corner of a single grain of si lver bromide, are shown. The spectra are in good qualitative agreement with the published data on film samples containing this dye.