A novel growth mode, characterized by absence of grain coarsening, Ostwald ripening, and secondary nucleation, is observed for a polar conjugated molecule, viz. tris-(8-hydroxyquinoline) aluminum (III) (Alq(3)), grown onto an apolar silicon substrate by high-vacuum sublimation. It results in correlated droplet patterns on a mesoscopic length scale with narrow size distribution, which can be tuned by means of the deposition time t and substrate temperature T-s. A comprehensive analysis of the results is obtained on the basis of a capture zone model.
"Growth of Mesoscopic Correlated Droplet Patterns by High-Vacuum Sublimation" / M., Brinkmann; Biscarini, Fabio; C., Taliani; I., Aiello; AND M., Ghedini. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1550-235X. - 61:(2000), pp. 16339-16342.
"Growth of Mesoscopic Correlated Droplet Patterns by High-Vacuum Sublimation"
BISCARINI, FABIO;
2000-01-01
Abstract
A novel growth mode, characterized by absence of grain coarsening, Ostwald ripening, and secondary nucleation, is observed for a polar conjugated molecule, viz. tris-(8-hydroxyquinoline) aluminum (III) (Alq(3)), grown onto an apolar silicon substrate by high-vacuum sublimation. It results in correlated droplet patterns on a mesoscopic length scale with narrow size distribution, which can be tuned by means of the deposition time t and substrate temperature T-s. A comprehensive analysis of the results is obtained on the basis of a capture zone model.
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