Quasiparticle Chirality in Epitaxial Graphene Probed at the Nanometer Scale (2008)
Brihuega, I., Mallet, P., Bena, C., Bose, S., Michaelis, C., Vitali, L., ...
Graphene exhibits unconventional two-dimensional electronic properties resulting from the symmetry of its quasiparticles, which leads to the concepts of pseudospin and electronic chirality. Here we...
Complex domain wall dynamics in compressively strained GaMnAs epilayers (2008)
Diez, L. Herrera, Kremer, R. K., Enders, A., Rössle, M., Arac, E., Honolka, J., ...
The domain wall induced reversal dynamics in compressively strained GaMnAs was studied employing the magneto-optical Kerr effect and Kerr microscopy. Due to the influence of an uniaxial part in the...
Substrate-controlled growth and magnetism of nanosize Fe clusters on Pt (2008)
Skomski, Ralph, Zhang, J., Sessi, V., Honolka, J., Kern, K., Enders, Axel
The growth and magnetism of nanosize Fe clusters on Pt and other metal surfaces are investigated. Fe clusters have been fabricated directly on the substrates by buffer layer assisted growth under...
Polymer nanofibers via nozzle-free centrifugal spinning (2008)
Weitz, R. T., Harnau, L., Rauschenbach, S., Burghard, M., Kern, K.
Organic n-channel transistors based on core-cyanated perylene carboxylic diimide derivates (2008)
Weitz, R. T., Armsharov, K., Zschieschang, U., Barrena Villas, E., Goswami, D. K., Burghard, M., ...
Absence of local magnetic moments in Ru and Rh impurities and clusters on Ag(100) and Pt(997) (2007)
Honolka, J., Kuhnke, K., Vitali, L., Enders, A., Kern, K., Gardonio, S., ...
The magnetism of quench-condensed Ru and Rh impurities and metal films on Ag(100) and Pt(997) has been studied using x-ray magnetic circular dichroism. In the coverage range between 0.22 ML and 2.0...
Electronic Band Structure Mapping of Nanotube Transistors by Scanning Photocurrent Microscopy (2007)
Lee, E. J. H., Balasubramanian, K., Dorfmueller, J., Vogelgesang, R., Fu, N., Mews, A., ...
Spatially resolved photocurrent measurements on carbon nanotube field-effect transistors (CNFETs) operated in various transport regimes are reported. It is demonstrated that the photocurrents...
Magnetic Anisotropy of Deposited Transition Metal Clusters (2007)
Bornemann, S., Minár, J., Staunton, J. B., Honolka, J., Enders, A., Kern, K., ...
We present results of magnetic torque calculations using the fully relativistic spin-polarized Korringa-Kohn-Rostoker approach applied to small Co and Fe clusters deposited on the Pt(111) surface....
Tracking the chiral recognition of adsorbed dipeptides at the single-molecule level (2007)
Lingenfelder, M., Tomba, G., Costantini, G., Ciacchi, L.C., Vita, A. De, Kern, K.
Structure and energetics of diphenylalanine self-assembling on Cu(110) (2007)
Tomba, G., Lingenfelder, M., Costantini, G., Kern, K., Klappenberger, F., Barth, J.V., ...
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...
Giant spin splitting through surface alloying. (2007)
Ast, C. R., Henk, J., Ernst, A., Moreschini, L., Falub, M. C., Pacile, D., ...
Exchange interaction between single magnetic adatoms (2007)
Wahl, P., Simon, P., Diekhöner, L., Stepanyuk, V. S., Bruno, P., Schneider, M. A., ...
Exchange interaction between single magnetic adatoms (2006)
Wahl, P., Simon, P., Diekhoener, L., Stepanyuk, V. S., Bruno, P., Schneider, M. A., ...
The magnetic coupling between single Co atoms adsorbed on a copper surface is determined by probing the Kondo resonance using low-temperature scanning tunneling spectroscopy. The Kondo resonance,...
Controlled deposition of size-selected silver nanoclusters (2006)
Bromann, K., Félix, C., Brune, H., Harbich, W., Monot, R., Buttet, J., ...
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...
Hard and soft landing of mass selected Ag clusters on Pt(111) (2006)
Bromann, K., Brune, H., Félix, C., Harbich, W., Monot, R., Buttet, J., ...
Mass selected Ag/sub n/ clusters (n=1,7,19) from a secondary ion source have been deposited onto a Pt(111) substrate at low temperature. The surface and resulting cluster morphology have subsequently...
Magnetism of Fe clusters and islands on Pt surfaces (2006)
Repetto, D., Honolka, J., Rusponi, S., Brune, H., Enders, A., Kern, K.
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...
Röttgen, M. A., Judai, K., Antonietti, J. M., Heiz, U., Rauschenbach, S., Kern, K.
A design of a radio-frequency (rf) octopole ion guide with truncated conical rods arranged in a conical geometry is presented. The performance is tested in a cluster deposition apparatus used for the...
Exclusive-OR gate with a single carbon nanotube (2006)
Sordan, R., Balasubramanian, K., Burghard, M., Kern, K.
Carbon nanotubes (CNTs) are now well-established as efficient channels for field-effect transistors (FETs). Logic circuitry based on CNTs have until now been demonstrated by replacing the silicon...
Simulation of optical near and far fields of dielectric apertureless scanning probes (2006)
Esteban, R., Vogelgesang, R., Kern, K.
We study apertureless field enhancing optical probes beyond the spherical approximation in a smooth transition towards up to 3 mu m long conical silicon tips. Such tips are used in apertureless...
Vitali, L., Burghard, M., Wahl, P., Schneider, M. A., Kern, K.
The electronic and vibrational density of states of a semiconducting carbon nanotube in a crossed junction was investigated by elastic and inelastic scanning tunneling spectroscopy. The strong radial...
Electrospray ion beam deposition of clusters and biomolecules (2006)
Rauschenbach, S., Stadler, F. L., Lunedei, E., Malinowski, N., Koltsov, S., Costantini, G., ...
An ion beam source using electrospray ionization is presented for non-destructive vacuum deposition of mass-selected large organic molecules and inorganic clusters. Electrospray ionization is used to...
Clair, S., Pons, S., Fabris, S., Baroni, S., Brune, H., Kern, K., ...
We report scanning tunneling microscopy observations on the formation of 2D Co-based coordination compounds on the reconstructed Au(111) surface. Preorganized arrays of Co bilayer islands are shown...
Coupled perpendicular magnetization in Fe/Cu/Fe trilayers (2006)
Repetto, D., Enders, A., Kern, K.
Ultrathin epitaxial Fe films on Cu(100) with perpendicular magnetization have been used as templates for the preparation of FCC Fe/Cu/Fe trilayers. The magnetic anisotropy and the coupling of these...
Apertureless scanning near field optical microscope with sub-10 nm resolution (2006)
Bek, A., Vogelgesang, R., Kern, K.
We report on the implementation of a versatile dynamic mode apertureless scanning near field optical microscope (aSNOM) for nanoscopic investigations of optical properties at surfaces and interfaces....
Kratzer, Peter, Liu, Q. K. K., Acosta-Diaz, P., Manzano, C., Costantini, G., Songmuang, R., ...
For heteroepitaxial growth of InAs islands on GaAs(001), a transition of shapes is observed experimentally by scanning-tunneling microscopy and analyzed theoretically in terms of the thermodynamic...
Surface-assisted coordination chemistry and self-assembly (2006)
Lin, N., Stepanow, S., Vidal, F., Kern, K., Alam, S., Strömsdörfer, S., ...
Structure and magnetism of atomically thin Fe layers on flat and vicinal Pt surfaces (2006)
Repetto, D., Lee, T. Y., Rusponi, S., Honolka, J., Kuhnke, K., Sessi, V., ...
Investigating the lateral motion of SiGe islands by selective chemical etching (2006)
Katsaros, G., Rastelli, A., Stoffel, M., Isella, G., Von Känel, H., Bittner, A. M., ...
Copper nanowires within the central channel of tobacco mosaic virus particles (2006)
Balci, S., Bittner, A. M., Hahn, K., Scheu, C., Knez, M., Kadri, A., ...
Interplay between thermodynamics and kinetics in the capping of InAs/GaAs(001) quantum dots (2006)
Costantini, G., Rastelli, A., Manzano, C., Acosta-Diaz, P., Songmuang, R., Katsaros, G., ...
Copper nanowires within the central channel of tobacco mosaic virus particles (2006)
Balci, S., Bittner, A. M., Hahn, K., Scheu, C., Knez, M., Kadri, A., ...
Magic alkali-fullerene compound clusters of extreme thermal stability (2006)
Enders, A., Malinowski, N., Ievlev, D., Zurek, E., Autschbach, J., Kern, K.
The thermal stability of free pure C-60-, as well as C-60-alkali, and -alkaline-earth metal compound clusters is investigated. We find that small (C-60)(m)-clusters (m
Cañas-Ventura, M. E., Klappenberger, F., Clair, S., Pons, S., Kern, K., Brune, H., ...
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...
Surface-template assembly of two-dimensional metal-organic coordination networks (2006)
Stepanow, S., Lin, N., Barth, J. V., Kern, K.
The self-assembly of iron-coordinated two-dimensional metal-organic networks on a Cu(100) surface has been investigated by scanning tunneling microscopy under ultra-high-vacuum conditions. We applied...
Katsaros, G., Rastelli, A., Stoffel, M., Costantini, G., Schmidt, O. G., Kern, K., ...
The authors apply selective wet chemical etching and atomic force microscopy to reveal the three-dimensional shape of SiGe/Si(001) islands after capping with Si. Although the "self-assembled quantum...
Orbital selective overlayer-substrate hybridization in a Pb monolayer on Ag(111) (2006)
Ast, C. R., Pacilé, D., Papagno, M., Gloor, T., Mila, F., Fedrigo, S., ...
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...
Reading the footprints of strained islands (2006)
Rastelli, A., Stoffel, M., Katsaros, G., Tersoff, J., Denker, U., Merdzhanova, T., ...
We report on recent advances in the understanding of surface processes occurring during growth and post-growth annealing of strained islands which may find application as self-assembled quantum dots....
Dmitriev, A., Spillmann, H., Stepanow, S., Strunskus, T., Wöll, C., Seitsonen, A. P., ...
The mesoscale induction of two-dimensional supramolecular chirality (formation of 2D organic domains with a single handedness) was achieved by self-assembly of 7,2,4-benzenetricarboxylic...
Ruben, M., Payer, D., Landa, A., Comisso, A., Gattinoni, C., Lin, N., ...
Two-dimensional supramolecular honeycomb networks with cavities of an internal diameter of 2.95 nm were formed by the self-assembly of 4,4',4"-benzene-1,3,5-triyl-tribenzoic acid (BTA) on a Ag(111)...
Single-walled carbon nanotube transistors on an ultra-thin gate dielectric (2006)
Weitz, R. T., Zschieschang, U., Klauk, H., Burghard, M., Kern, K.
Back-gated single-walled carbon nanotube (SWCNT) transistors were fabricated using a silane-based organic self-assembled monolayer as a gate dielectric on top of a highly doped silicon wafer. These...
Alloying of self-organized semiconductor 3D islands (2006)
Ratto, A., Costantini, G., Rastelli, A., Schmidt, O. G., Kern, K., Rosei, F.
Single atoms are the most active: Cu-catalyzed carboxylic deprotonation (2006)
Payer, D., Strunskus, T., Dmitriev, A., Lin, N., Barth, J. V., Wöll, C., ...
Copper nanowires within the central channel of tobacco mosaic virus particles (2006)
Balci, S., Bittner, A. M., Hahn, K., Scheu, C., Knez, M., Kadri, A., ...
Copper nanowires within the central channel of tobacco mosaic virus particles (2006)
Balci, S., Bittner, A. M., Hahn, K., Scheu, C., Knez, M., Kadri, A., ...
Periodic pillar structures by Si etching of multilayer GeSi/Si islands (2005)
Zhong,Z., Katsaros,G., Stoffel,M., Costantini,G., Kern,K., Schmidt,O. G., ...
A micromechanical detector for molecular beams (2005)
Wicki, A, Marsico, V, Kuhnke, K, Kern, K, Paratte, L, Schweizer, S, ...
We demonstrate the detection of a molecular beam by means of a micromechanical momentum transfer detector operated in vibrational resonance. With a sensitive surface area of 0.5x0.3 mm(2) the small...
Vitali, L., Burghard, M., Wahl, P., Schneider, M. A., Kern, K.
The electronic and vibrational density of states of a semiconducting carbon nanotube in a crossed junction was investigated by elastic and inelastic scanning tunneling spectroscopy. The strong radial...
Hierarchical Triggering of Star Formation by Superbubbles in W3/W4 (2005)
Oey, M. S., Watson, A. M., Kern, K., Walth, G. L.
It is generally believed that expanding superbubbles and mechanical feedback from massive stars trigger star formation, because there are numerous examples of superbubbles showing secondary star...
Lateral motion of SiGe islands driven by surface-mediated alloying (2005)
Denker,U., Rastelli,A., Stoffel,M., Tersoff,J., Katsaros,G., Costantini,G., ...
High Power Pulse Energy System Concept (2005)
Lee, Ho-Lun, Mason, G., Kern, K.
New advances in capacitor technology create exciting opportunities in size and weight reduction for high-power, pulse energy systems having a broad range of applications. Characteristics of a...
Lateral motion of SiGe islands driven by surface-mediated alloying (2005)
Denker, U., Rastelli, A., Stoffel, M., Tersoff, J., Katsaros, G., Costantini, G., ...
Two-dimensional adatom gas bestowing dynamic heterogeneity on surfaces (2005)
Lin, N., Payer, D., Dmitriev, A., Strunskus, T., Wöll, C., Barth, J. V., ...
Photocurrent imaging of charge transport barriers in carbon nanotube devices (2005)
Balasubramanian, K., Burghard, M., Kern, K., Scolari, M., Mews, A.
Pyramids and domes in the InAs/GaAs(001) and Ge/Si(001) systems (2005)
Costantini, G., Rastelli, A., Manzano, C., Acosta-Diaz, P., Katsaros, G., Songmuang, R., ...
Stepanow, S., Lin, N., Vidal, F., Landa, A., Ruben, M., Barth, J. V., ...
Lateral motion of SiGe islands driven by surface-mediated alloying (2005)
Denker, U., Rastelli, A., Stoffel, M., Tersoff, J., Katsaros, G., Costantini, G., ...