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Klaus Kern

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Related publications (299)

Carbon nanotube transistors - chemical functionalization and device characterization

Klaus Kern, Kannan Balasubramanian, Marko Burghard, Ralf Thomas Weitz, Eduardo Jian Hua Lee

This review presents an overview of the recent progress made in the field of carbon nanotube (CNT)-based field-effect transistors (FETs). Starting from the simplest device architectures, various methods reported for fabricating CNT-FETs are presented. The ...

Wiley2008

Giant spin splitting through surface alloying

Klaus Kern, Marco Grioni, Daniela Pacilè, Luca Moreschini

The long-range ordered surface alloy Bi/Ag(111) is found to exhibit a giant spin splitting of its surface electronic structure due to spin-orbit coupling, as is determined by angle-resolved photoelectron spectroscopy. First-principles electronic structure ...

American Physical Society2007

Local detection of spin-orbit splitting by scanning tunneling spectroscopy

Klaus Kern, Marco Grioni, Daniela Pacilè, Luca Moreschini, Peter Wahl

We demonstrate that the spin-orbit coupling of two-dimensional surface states can be detected locally by scanning-tunneling spectroscopy (STS). The spin splitting of the surface state induces a singularity in the local density of states which can be detect ...

2007

Template-directed supramolecular self-assembly of coordination dumbbells at surfaces

Klaus Kern, Alexander Langner

Scanning tunneling microscopy reveals, at single-molecular resolution, how external parameters-substrate morphology and guest addition-re-direct the assembly of dumbbell-shaped coordination supramolecules towards different surfaceconfined supramolecular or ...

Royal Society of Chemistry2007

Toward mechanical switching of surface-adsorbed [2]catenane by in situ copper complexation

Klaus Kern, Dietmar Payer, Stephan Rauschenbach

Using scanning tunneling microscopy (STM), electrospray ionization mass spectrometry (ESI-MS), and X-ray photoelectron spectroscopy (XPS), we demonstrate that a free (2]catenane consisting of two interlocking 30-membered rings (cat-30) can be deposited on ...

2007

Conformational adaptation in supramolecular assembly on surfaces

Harald Brune, Klaus Kern, Sylvain Clair, Marta Canas Ventura, Uta Schlickum

2007

Electronic-band-structure mapping of nanotube transistors by scanning photocurrent microscopy

Klaus Kern, Kannan Balasubramanian, Marko Burghard, Eduardo Jian Hua Lee

2007

Structure and energetics of diphenylalanine self-assembling on Cu(110)

Klaus Kern, Magalí Alejandra Lingenfelder, Giovanni Costantini

We investigate the dynamical features of the adsorption of diphenylalanine molecules on the Cu(I 10) surface and of their assembling into supramolecular structures by a combination of quantum and classical atomistic modeling with dynamic scanning tunneling ...

2007

Ordering of dipeptide chains on Cu surfaces through 2D cocrystallization

Klaus Kern, Magalí Alejandra Lingenfelder, Giovanni Costantini

We report on the induced ordering of dispersed chiral diphenylalanine (Phe-Phe) chains grown on the anisotropic Cu(110) and isotropic Cu(100) surfaces. Scanning tunneling microscopy (STM) data reveal that 2D extended hybrid molecular motifs can be fabricat ...

2007

Hydrogen and coordination bonding supramolecular structures of trimesic acid on Cu(110)

Klaus Kern, Magalí Alejandra Lingenfelder, Giovanni Costantini

The adsorption of trimesic acid (TMA) on Cu(110) has been studied in the temperature range between 130 and 550 K and for coverages up to one monolayer. We combine scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), reflection absor ...

2007

Metal-organic honeycomb nanomeshes with tunable cavity size

Harald Brune, Klaus Kern, Régis Decker

We present a systematic study of metal-organic honeycomb lattices assembled from simple ditopic molecular bricks and Co atoms on Ag(111). This approach enables us to fabricate size- and shape-controlled open nanomeshes with pore dimensions up to 5.7 nm. Th ...

2007

Surface-assisted assembly of 2D metal-organic networks that exhibit unusual threefold coordination symmetry

Harald Brune, Klaus Kern, Uta Schlickum

Wiley-VCH Verlag GmbH2007

Magnetism of Fe clusters and islands on Pt surfaces

Harald Brune, Klaus Kern, Stefano Rusponi

Clusters and islands of Fe atoms have been prepared by noble gas buffer layer assisted growth as well as by standard molecular beam epitaxy on Pt substrates. Xe buffer layers have been utilized to promote the formation of compact, relaxed Fe clusters with ...

2006

Orbital selective overlayer-substrate hybridization in a Pb monolayer on Ag(111)

Thomas Gloor, Harald Brune, Klaus Kern, Marco Grioni, Stephan Fedrigo, Frédéric Mila, Daniela Pacilè

The electronic structure of a Pb overlayer on Ag(111) has been studied by angle-resolved photoemission spectroscopy. We identify three p bands. While the p(xy) bands are sharp and closely resemble the corresponding bands of a free-standing Pb layer, the p( ...

2006

Structure and magnetism of atomically thin Fe layers on flat and vicinal Pt surfaces

Harald Brune, Klaus Kern, Pietro Gambardella, Stefano Rusponi, Violetta Sessi

Ultrathin Fe films on Pt substrates have been investigated under ultrahigh vacuum conditions by scanning tunneling microscopy, low energy electron diffraction, magneto-optical Kerr effect, x-ray magnetic circular dichroism measurements, and Kerr microscopy ...

2006

Equilibrium island-size distribution in one dimension

Harald Brune, Klaus Kern, Pietro Gambardella

We derive an analytical expression for the size distribution of monoatomic wires in the framework of a one-dimensional lattice gas model at thermodynamic equilibrium. The theoretical results are compared with the size distribution of one-dimensional Ag wir ...

2006

Coexistence of one- and two-dimensional supramolecular assemblies of terephthalic acid on Pd(111) due to self-limiting deprotonation

Harald Brune, Klaus Kern, Sylvain Clair, Marta Canas Ventura

The adsorption of terephthalic acid [C6H4(COOH)(2), TPA] on a Pd(111) surface has been investigated by means of scanning tunneling microscopy (STM), x-ray photoelectron spectroscopy, and near-edge x-ray absorption fine structure spectroscopy under ultrahig ...

2006

STM study of terephthalic acid self-assembly on Au(III): Hydrogen-bonded sheets on an inhomogeneous substrate

Harald Brune, Klaus Kern, Sylvain Clair

The adsorption and ordering of the molecule terephthalic acid (TPA), 1,4-benzene-dicarboxylic acid C6H4-(COOH)(2), on the reconstructed Au(111) surface has been studied in situ in ultrahigh vacuum by scanning tunneling microscopy (STM) at room temperature. ...

American Chemical Society2004

Controlled deposition of size-selected silver nanoclusters

Harald Brune, Wolfgang Harbich, Klaus Kern, René Monot

Variable-temperature scanning tunneling microscopy was used to study the effect of kinetic cluster energy and rare-gas buffer layers on the deposition process of size-selected silver nanoclusters on a platinum(111) surface. Clusters with impact energies of ...

American Association for the Advancement of Science1996

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