Molecular junctions based on SAMs of cruciform oligo(phenylene ethynylene)s

Bibliographische Detailangaben
Veröffentlicht in:	Langmuir : the ACS journal of surfaces and colloids. - 1992. - 28(2012), 8 vom: 28. Feb., Seite 4016-23
1. Verfasser:	Wei, Zhongming (VerfasserIn)
Weitere Verfasser:	Li, Tao, Jennum, Karsten, Santella, Marco, Bovet, Nicolas, Hu, Wenping, Nielsen, Mogens Brøndsted, Bjørnholm, Thomas, Solomon, Gemma C, Laursen, Bo W, Nørgaard, Kasper
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2012
Zugriff auf das übergeordnete Werk:	Langmuir : the ACS journal of surfaces and colloids
Schlagworte:	Journal Article

Beschreibung
Zusammenfassung:	© 2012 American Chemical Society Cruciform oligo(phenylene ethynylene)s (OPEs) with an extended tetrathiafulvalene (TTF) donor moiety (OPE5-TTF and OPE3-TTF) and their simple analogues (OPE5-S and OPE3) without conjugated substituents were used to form high-quality self-assembled monolayers (SAMs) on ultraflat gold substrates. Molecular junctions based on these SAMs were investigated using conducting-probe atomic force microscopy (CP-AFM). The TTF substituent changes the molecular orbital energy levels and decreases the HOMO-LUMO energy gap, resulting in a 9-fold increase in conductance for both TTF cruciform OPEs compared to the unsubstituted analogues. The difference in electrical transport properties of the SAMs was reproduced by the theoretical transport calculations for the single molecules
Beschreibung:	Date Completed 13.06.2012 Date Revised 28.02.2012 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1520-5827
DOI:	10.1021/la204340n