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Observation of coexistence of 1D and 2D nanostructures in cobalt dipyrromethene trimer complexes adsorbed on a graphite surface

TitleObservation of coexistence of 1D and 2D nanostructures in cobalt dipyrromethene trimer complexes adsorbed on a graphite surface
Publication TypeJournal Article
Year of Publication2009
AuthorsSon, SB, Lee, SJ, Hahn, JR, Ma, L, Shin, JY, Dolphin, D
JournalApplied Surface Science
Volume256
Pagination1176-1179
Date PublishedNov
Type of ArticleProceedings Paper
ISBN Number0169-4332
KeywordsCHEMISTRY, dipyrromethene, Graphite, MANIPULATION, microscopy, MONOLAYER, PHTHALOCYANINES, PORPHYRIN, porphyrins, SCANNING TUNNELING MICROSCOPY, STM, Supramolecules, VACANCY
Abstract

We report the direct observation of 1D and 2D nanostructures of cobalt dipyrromethene trimer complexes adsorbed on a highly oriented pyrolytic graphite surface using scanning tunneling microscopy (STM). STM images showed two types of ordered structures coexisting on the surface: long 1D molecular chains isolated on the terraces, and 2D hexagonal patterns confined by a 1D chain and/or a graphite step edge. These 1D and 2D structures are attributed to ’edge-on’ and ’face-on’ complex alignments on the surface, respectively. In both configurations, substrate-mediated molecule-molecule interactions may play a significant role in stabilizing the nanostructures. (C) 2009 Elsevier B. V. All rights reserved.

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