H. Saijo et M. Shiojiri, ATOMIC-FORCE MICROSCOPY OBSERVATION OF CYANINE DYE J-AGGREGATES ON AGBR MICROCRYSTALS GROWN IN GELATIN, Journal of imaging science and technology, 40(2), 1996, pp. 111-116
The morphology of thiacarbocyanine and oxacarbocyanine dye J-aggregate
s adsorbed on (001) surfaces of AgBr microcrystals grown in gelatin wa
s observed by atomic force microscopy. No residue of fibrous gelatin w
as found on the specimen. The cyanine dyes grew in islands or stripes
by means of the Volmer-Weber growth mode, rather than by monolayer ads
orption. The thickness of stripes varied from 0.5 nm (monolayer) to 30
nm, and the stripes were constructed of many rectangles [20 x (35-50)
nm]. The rectangles were regarded as elementary crystallites or J-agg
regate particles photoelectrically separated from one another.