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STM investigation of large π-conjugated oligomers and tetrahydrofuran codeposited on Cu(111) by pulse injection

Pérez León, Carmen; Sürgers, Christoph; Mayor, M.; Marz, Michael; Hoffmann, Regina; Löhneysen, Hilbert von

Abstract:
The π-conjugated oligomer consisting of ethynyl interlinked thiophene and benzene subunits C114H158O8S2Si2 has been deposited on clean Cu(111) substrates at room temperature using the pulse-injection method with tetrahydrofuran (THF) as solvent. Scanning tunneling microscopy measurements in ultrahigh vacuum at room temperature demonstrate that the CHOSSi and THF molecules coadsorb on the copper surface. The solvent molecules form ordered structures with distinct orientations and domain boundaries, suggesting a strong interaction of THF with the substrate. Individual and small clusters of CHOSSi molecules appear randomly distributed on the surface with no apparent correlation with the solvent molecules. Subsequent thermal treatment removing the solvent causes a degradation of the CHOSSi oligomers which aggregate forming fractal nanostructures.



Originalveröffentlichung
DOI: 10.1021/jp904169c
Scopus
Zitationen: 8
Web of Science
Zitationen: 8
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Institut für Festkörperphysik (IFP)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2009
Sprache Englisch
Identifikator ISSN: 1932-7447, 1932-7455
KITopen-ID: 1000017055
HGF-Programm 43.02.02 (POF II, LK 01)
Molekulare Bausteine
Erschienen in The journal of physical chemistry <Washington, DC> / C
Band 113
Heft 32
Seiten 14335-14340
Nachgewiesen in Web of Science
Scopus
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