Daniela Rolf
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View article: Resolution of intramolecular dipoles and push-back effect of individual molecules on a metal surface
Resolution of intramolecular dipoles and push-back effect of individual molecules on a metal surface Open
Molecules consisting of a donor and an acceptor moiety can exhibit large intrinsic dipole moments. Upon deposition on a metal surface, the dipole may be effectively screened and the charge distribution altered due to hybridization with sub…
View article: Shot-noise measurements of single-atom junctions using a scanning tunneling microscope
Shot-noise measurements of single-atom junctions using a scanning tunneling microscope Open
Current fluctuations related to the discreteness of charge passing through small constrictions are termed shot noise. This unavoidable noise provides both advantages—being a direct measurement of the transmitted particles’ charge—and disad…
View article: Shot-noise measurements of single-atom junctions
Shot-noise measurements of single-atom junctions Open
Current fluctuations related to the discreteness of charge passing through small constrictions are termed shot noise. This unavoidable noise provides both advantages - being a direct measurement of the transmitted particles' charge, and di…
View article: Electronic Properties of Tetraazaperopyrene Derivatives on Au(111): Energy-Level Alignment and Interfacial Band Formation
Electronic Properties of Tetraazaperopyrene Derivatives on Au(111): Energy-Level Alignment and Interfacial Band Formation Open
N-heteropolycyclic aromatic compounds are promising organic electron-transporting semiconductors for applications in field-effect transistors. Here, we investigated the electronic properties of 1,3,8,10-tetraazaperopyrene derivatives adsor…
View article: Electronic Properties of Tetraazaperopyrene Derivatives\non Au(111): Energy-Level Alignment and Interfacial Band Formation
Electronic Properties of Tetraazaperopyrene Derivatives\non Au(111): Energy-Level Alignment and Interfacial Band Formation Open
N-Heteropolycyclic aromatic compounds are promising organic electron-transporting semiconductors for applications in field effect transistors. Here, we investigated the electronic properties of 1,3,8,10-tetraazaperopyrene derivatives adsor…
View article: Correlation of Vibrational Excitations and Electronic Structure with Submolecular Resolution
Correlation of Vibrational Excitations and Electronic Structure with Submolecular Resolution Open
The detection of vibrational excitations of individual molecules on surfaces by scanning tunneling spectroscopy does not obey strict selection rules but rather propensity rules. The experimental verification of these is challenging because…
View article: Correlation of vibrational excitations and electronic structure with submolecular resolution
Correlation of vibrational excitations and electronic structure with submolecular resolution Open
The detection of vibrational excitations of individual molecules on surfaces by scanning tunneling spectroscopy does not obey strict selection rules but rather propensity rules. The experimental verification of these excitations is challen…
View article: Fundamental Properties of Atoms and Molecules on Surfaces
Fundamental Properties of Atoms and Molecules on Surfaces Open
In this thesis, two different projects are presented that concentrate on complementary aspects of nanoscopic systems. Not only "conventional" scanning tunneling microscopy (STM) is utilized to study the fundamental properties of atoms and …
View article: Electronic structure of an iron porphyrin derivative on Au(1 1 1)
Electronic structure of an iron porphyrin derivative on Au(1 1 1) Open
Surface-bound porphyrins are promising candidates for molecular switches, electronics and spintronics. Here, we studied the structural and the electronic properties of Fe-tetra-pyridil-porphyrin adsorbed on Au(1 1 1) in the monolayer regim…
View article: Visualizing Intramolecular Distortions as the Origin of Transverse Magnetic Anisotropy
Visualizing Intramolecular Distortions as the Origin of Transverse Magnetic Anisotropy Open
The magnetic properties of metal–organic complexes are strongly influenced by conformational changes in the ligand. The flexibility of Fe-tetra-pyridyl-porphyrin molecules leads to different adsorption configurations on a Au(111) surface. …
View article: Magnetic anisotropy in surface-supported single-ion lanthanide complexes
Magnetic anisotropy in surface-supported single-ion lanthanide complexes Open
Single-ion lanthanide-organic complexes can provide stable magnetic moments with well-defined orientation for spintronic applications on the atomic level. Here, we show by a combined experimental approach of scanning tunneling microscopy a…