TY - JOUR
T1 - Filled and empty states of alkanethiol monolayer on Au (1 1 1)
T2 - Fermi level asymmetry and implications for electron transport
AU - Qi, Yabing
AU - Yaffe, Omer
AU - Tirosh, Einat
AU - Vilan, Ayelet
AU - Cahen, David
AU - Kahn, Antoine
N1 - Funding Information:
DC & AK gratefully acknowledge support from the US-Israel Binational Science Foundation. Work at Princeton was in part supported by the National Science Foundation ( DMR-1005892 ) and the Princeton MRSEC of the National Science Foundation ( DMR-0819860 ). Work at the Weizmann received also partial support from the Israel Science Foundation, via a Centre of excellence and its NAno-ERA+ program. OY thanks the Azrieli foundation for a fellowship. DC. Holds the Schaefer chair in Energy research.
PY - 2011/8/5
Y1 - 2011/8/5
N2 - The electronic structure of the prototypical self-assembled monolayer (SAM) system, i.e. alkanethiol molecules on Au, is investigated via ultraviolet and inverse photoemission spectroscopy measurements. The determination of the density of filled and empty states of the system reveals that the metal Fermi level is significantly closer to the lowest unoccupied molecular orbital (LUMO) of the molecules than to their highest occupied molecular orbital (HOMO). The results suggest that charge carrier tunneling is controlled by the LUMO, rather than by the HOMO, in contrast to what is commonly assumed.
AB - The electronic structure of the prototypical self-assembled monolayer (SAM) system, i.e. alkanethiol molecules on Au, is investigated via ultraviolet and inverse photoemission spectroscopy measurements. The determination of the density of filled and empty states of the system reveals that the metal Fermi level is significantly closer to the lowest unoccupied molecular orbital (LUMO) of the molecules than to their highest occupied molecular orbital (HOMO). The results suggest that charge carrier tunneling is controlled by the LUMO, rather than by the HOMO, in contrast to what is commonly assumed.
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U2 - 10.1016/j.cplett.2011.06.050
DO - 10.1016/j.cplett.2011.06.050
M3 - Article
AN - SCOPUS:79960925329
VL - 511
SP - 344
EP - 347
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 4-6
ER -