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Ultrathin KCI films on Cu(110) and Cu(111) studied by low-temperature scanning tunneling microscopy

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Tunnelling dynamics between superconducting bound states at the atomic limit

Klaus Kern, Jacob Senkpiel, Haonan Huang

A magnetic impurity is placed on the tip of a scanning tunnelling microscope, allowing direct tunnelling between two Yu-Shiba-Rusinov bound states. This technique can probe and enhance the impurity state lifetime. There is a limit to the miniaturization of ...

2020

3D Silver Dendrites for Single-molecule Imaging by Surface-enhanced Raman Spectroscopy

Discovery of surface-enhanced Raman scattering (SERS) followed by evolution of optical systems and nanoengineering approaches has paved a path to detection of essential organic molecules on solid SERS-active substrates from solutions at concentrations attr ...

2020

Gold Chain Formation via Local Lifting of Surface Reconstruction by Hot Electron Injection on H-2(D-2)/Au(111)

Klaus Kern, Anna Maria Roslawska, Abhishek Grewal

The hexagonal close packed surface of gold shows a 22 x root 3 "herringbone" surface reconstruction which makes it unique among the (111) surfaces of all metals. This long-range energetically favored dislocation pattern appears in response to the strong te ...

AMER CHEMICAL SOC2020

The efficiency and peculiarities of processes such as surface adsorption or electron-to-photon energy conversion in organic and inorganic structures are determined by the dynamics at the scale of individual molecules, atoms and charges. The timescales of s ...

EPFL2019

Three-dimensional imaging of integrated circuits with macro- to nanoscale zoom

Gabriel Aeppli, Manuel Guizar Sicairos, Christian David, Michal Odstrcil

The imaging of integrated circuits across different length scales is required for failure analysis, design validation and quality control. At present, such inspection is accomplished using a hierarchy of different probes, from optical microscopy on the mil ...

NATURE PUBLISHING GROUP2019

Nanofluidic systems offer a huge potential for discovery of new molecular transport and chemical phenomena that can be employed for future technologies. Herein, we report on the transport behavior of surface-reactive compounds in a nanometer-scale flow of ...

AMER CHEMICAL SOC2019

Characterization of Fly Ashes by a Novel Method in the Scanning Electron Microscope

Karen Scrivener, Cyrille Dunant, Mohsen Ben Haha, Pawel Tadeusz Durdzinski

In this paper, we show a new technique to characterize fly ashes using scanning electron microscopy (SEM). Chemical composition of millions of points is measured by SEM-energy dispersive X-ray spectroscopy and plotted in a ternary frequency plot. This new ...

ASTM INTERNATIONAL2019

Rapid solidification of Al-Cu droplets of near eutectic composition

Michel Rappaz, Jonas Valloton

Near eutectic Al-Cu droplets were rapidly solidified by Impulse Atomization. A wide range of microstructural scales was obtained at different cooling rates and undercoolings. The micrographs of the investigated samples revealed two distinct zones of differ ...

IOP PUBLISHING LTD2019

Nonbenzenoid carbocyclic rings are postulated to serve as important structural elements toward tuning the chemical and electronic properties of extended polycyclic aromatic hydrocarbons (PAHs, or namely nanographenes), necessitating a rational and atomical ...

AMER CHEMICAL SOC2019

Assembly of Robust Holmium-Directed 2D Metal-Organic Coordination Complexes and Networks on the Ag(100) Surface

Harald Brune

We describe the formation of lanthanide-organic coordination networks and complexes under ultra-high-vacuum conditions on a clean Ag(100) surface. The structures comprise single Ho atoms as coordination centers and 1,4-benzenedicarboxylate (from terephtali ...

AMER CHEMICAL SOC2018