Abstract
The photosensitive dyes thiacarbocyanine and oxacarbocyanine on 0.7 μm AgBr cubic crystals are observed by analytical-color-fluorescence electron microscopy (ACFEM), ultra-low-energy scanning electron microscopy (SEM), and atomic force microscopy (AFM). ACFEM proves that the dye makes J-aggregates, exhibiting cathodoluminescence spots about 30 × 70 nm. SEM reveals dye stripes epitaxially grown on the (001) AgBr surface. AFM gives the thickness of the stripes, varying from 1 to 20 nm or more, and resolves single J-aggregate particles arranged in the stripe. It is concluded that the dye forms in the stripes by island growth rather than in monolayer adsorption.
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