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Spatial variations of conductivity of self-assembled monolayers of dodecanethiol on Au/mica and Au/Si substrates

Skolaut, Julian 1; Tepper, Jędrzej; Galli, Federica; Wulfhekel, Wulf 2; van Ruitenbeek, Jan M.
1 Karlsruher Institut für Technologie (KIT)
2 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)

Abstract:

Determining the conductivity of molecular layers is a crucial step in advancing towards applications in molecular electronics. A common test bed for fundamental investigations on how to acquire this conductivity are alkanethiol layers on gold substrates. A widely used approach in measuring the conductivity of a molecular layer is conductive atomic force microscopy. Using this method, we investigate the influence of a rougher and a flatter gold substrate on the lateral variation of the conductivity. We find that the roughness of the substrate crucially defines this variation. We conclude that it is paramount to adequately choose a gold substrate for investigations on molecular layer conductivity.


Verlagsausgabe §
DOI: 10.5445/IR/1000166066
Veröffentlicht am 28.12.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2190-4286
KITopen-ID: 1000166066
Erschienen in Beilstein Journal of Nanotechnology
Verlag Beilstein-Institut
Band 14
Seiten 1169–1177
Vorab online veröffentlicht am 05.12.2023
Schlagwörter Au/mica, Au/Si, conductive atomic force microscopy, dodecanethiol, self-assembled monolayers
Nachgewiesen in Dimensions
Scopus
Web of Science
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