Publications de Christopher Seiji Kley

Modeling Ferro- and Antiferromagnetic Interactions in Metal-Organic Coordination Networks

Klaus Kern, Sebastian Stepanow, Tzu-Chun Tseng, Violetta Sessi, Alexander Langner, Nasiba Abdurakhmanova, Christopher Seiji Kley

Magnetization curves of two rectangular metalorganic coordination networks formed by the organic ligand TCNQ (7,7,8,8-tetracyanoquinodimethane) and two different (Mn and Ni) 3d transition metal atoms [M(3d)] show marked differences that are explained using ...

Amer Chemical Soc2015

Atomic-Scale Observation of Multiconformational Binding and Energy Level Alignment of Ruthenium-Based Photosensitizers on TiO2 Anatase

Klaus Kern, Christian Alexander Stephan Dette, Stephan Rauschenbach, Sebastian Stepanow, Feliciano Giustino, Gordon Rinke, Christopher Seiji Kley

Dye-sensitized solar cells constitute a promising approach to sustainable and low-cost solar energy conversion. Their overall efficiency crucially depends on the effective coupling of the photosensitizers to the photoelectrode and the details of the dye's ...

Amer Chemical Soc2014

TiO2 Anatase with a Bandgap in the Visible Region

Klaus Kern, Christian Alexander Stephan Dette, Feliciano Giustino, Christopher Seiji Kley

TiO2 anatase plays a central role in energy and environmental research. A major bottleneck toward developing artificial photosynthesis with TiO2 is that it only absorbs ultraviolet light, owing to its large bandgap of 3.2 eV. If one could reduce the bandga ...

Amer Chemical Soc2014

Convergent and divergent two-dimensional coordination networks formed through substrate-activated or quenched alkynyl ligation

Klaus Kern, Sebastian Stepanow, Christopher Seiji Kley

Metal coordination assemblies of the symmetric bi-functional 4,4'-di-(1,4-buta-1,3-diynyl)-benzoic acid are investigated by scanning tunnelling microscopy on metal surfaces. The formation of long-range ordered, short-range disordered and random phases depe ...

Royal Society of Chemistry2014

Functionalization of Open Two-Dimensional Metal-Organic Templates through the Selective Incorporation of Metal Atoms

Klaus Kern, Sebastian Stepanow, Christopher Seiji Kley

Surface-confined molecular networks can serve as templates to steer the adsorption and organization of secondary ligands, metal atoms, and clusters. Here, the incorporation of Ni atoms and clusters into open two-dimensional robust metal-organic templates s ...

Amer Chemical Soc2013

Superexchange-Mediated Ferromagnetic Coupling in Two-Dimensional Ni-TCNQ Networks on Metal Surfaces

Klaus Kern, Tzu-Chun Tseng, Violetta Sessi, Nasiba Abdurakhmanova, Christopher Seiji Kley

We investigate the magnetic coupling of Ni centers embedded in two-dimensional metal-coordination networks self-assembled from 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecules on Ag(100) and Au (111) surfaces. X-ray magnetic circular dichroism measurement ...

Amer Physical Soc2013

Atomic-Scale Characterization and Control of Metal-Organic Templates and Photosensitizers on Surfaces

Christopher Seiji Kley

EPFL2013

Highly Adaptable Two-Dimensional Metal-Organic Coordination Networks on Metal Surfaces

Klaus Kern, Sebastian Stepanow, Christopher Seiji Kley

The formation of extended two-dimensional metal organic coordination networks (2D-MOCNs) showing high adaptability to surface step edges and structural defects is revealed by scanning tunneling microscopy. Rod-like 4,4'-di-(1,4-buta-1,3-diynyl)-benzoic aci ...

2012