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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

Title	Ring and Volcano Structures Formed by a Metal Dipyrromethene Complex
Author	Seung Bae Son, Qing Miao, Ji-Young Shin, David Dolphin, Jae Ryang Hahn*
Keywords	Dipyrromethene, AFM, Coffee-ring, Toroid ring, Evaporation
Abstract	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.
Page	1727 - 1731
Full Text	PDF

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