TY  - JOUR
AU  - Hurdax, Philipp
AU  - Hollerer, Michael
AU  - Egger, Larissa
AU  - Koller, Georg
AU  - Yang, Xiaosheng
AU  - Haags, Anja
AU  - Soubatch, Serguei
AU  - Tautz, Frank Stefan
AU  - Richter, Mathias
AU  - Gottwald, Alexander
AU  - Puschnig, Peter
AU  - Sterrer, Martin
AU  - Ramsey, Michael G
TI  - Controlling the electronic and physical coupling on dielectric thin films
JO  - Beilstein journal of nanotechnology
VL  - 11
SN  - 2190-4286
CY  - Frankfurt, M.
PB  - Beilstein-Institut zur Förderung der Chemischen Wissenschaften
M1  - FZJ-2021-03371
SP  - 1492 - 1503
PY  - 2020
AB  - Ultrathin dielectric/insulating films on metals are often used as decoupling layers to allow for the study of the electronic properties of adsorbed molecules without electronic interference from the underlying metal substrate. However, the presence of such decoupling layers may effectively change the electron donating properties of the substrate, for example, by lowering its work function and thus enhancing the charging of the molecular adsorbate layer through electron tunneling. Here, an experimental study of the charging of para-sexiphenyl (6P) on ultrathin MgO(100) films supported on Ag(100) is reported. By deliberately changing the work function of the MgO(100)/Ag(100) system, it is shown that the charge transfer (electronic coupling) into the 6P molecules can be controlled, and 6P monolayers with uncharged molecules (Schottky–Mott regime) and charged and uncharged molecules (Fermi level pinning regime) can be obtained. Furthermore, it was found that charge transfer and temperature strongly influence the orientation, conformation, and wetting behavior (physical coupling) of the 6P layers on the MgO(100) thin films.
LB  - PUB:(DE-HGF)16
C6  - 33083197
UR  - <Go to ISI:>//WOS:000575579000001
DO  - DOI:10.3762/bjnano.11.132
UR  - https://juser.fz-juelich.de/record/894719
ER  -