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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 35, Number 6
BKCSDE 35(6)
June 20, 2014 

Ring and Volcano Structures Formed by a Metal Dipyrromethene Complex
Seung Bae Son, Qing Miao, Ji-Young Shin, David Dolphin, Jae Ryang Hahn*
Dipyrromethene, AFM, Coffee-ring, Toroid ring, Evaporation
Dichloromethane liquid droplets containing a cobalt dipyrromethene trimer deposited on a graphite surface were found to form coffee ring, toroid ring, or volcano dot structures due to the redistribution of the solute during solvent evaporation. The shapes and size distributions of the ring structures depended on the drying temperature. The shape differences were attributed to the fact that the solvent evaporation rate controlled the self-assembly process that yielded the coffee stain and pinhole structures.
1727 - 1731
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