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Waveguide modes spatially resolved by low-loss STEM-EELS

Publications associées (40)

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Controllable Shrinking and Shaping of Glass Nanocapillaries under Electron Irradiation

Aleksandra Radenovic, Lorenz Jan Steinbock

The ability to reshape nanopores and observe their shrinkage under an electron microscope is a powerful and novel technique. It increases the sensitivity of the resistive pulse sensing and enables to detect very short and small molecules. However, this has ...

American Chemical Society2013

Electron energy loss spectroscopy investigation through a nano ablated uranium dioxide sample

A lamella of uranium dioxide (similar to 10 x similar to 10 x similar to 0.02-0.20 mu m) was produced by focused ion beam for transmission electron and electron energy loss spectroscopy (EELS) examinations. This sample allows quantitative analysis of the E ...

Elsevier Science Bv2013

Single Superparamagnetic Bead Detection and Direct Tracing of Bead Position Using Novel Nanocomposite Nano-Hall Sensors

Giovanni Boero, Ivo Utke, Laurent Bernau

We show that nanocomposite materials consisting of superparamagnetic nanoparticles embedded in a matrix are very good candidates for a novel generation of Hall nanosensors with high spatial and magnetic resolution, capable of detecting superparamagnetic be ...

Institute of Electrical and Electronics Engineers2013

Universal sample holder

Graham Knott

This device is for holding samples during their preparation prior to imaging in the electron microscope. The design means it can be transferred between the light and electron microscopes as well as trimming devices used to prepare the final sample. It can ...

2013

Multivariate statistical analysis as a tool for the segmentation of 3D spectral data

Cécile Hébert, Marco Cantoni, Guillaume Lucas, Pierre Burdet

Acquisition of three-dimensional (3D) spectral data is nowadays common using many different microanalytical techniques. In order to proceed to the 3D reconstruction, data processing is necessary not only to deal with noisy acquisitions but also to segment ...

Pergamon-Elsevier Science Ltd2013

The great achievement of nanotechnology is the controlled synthesis of a large variety of nanometer-size materials like needle-formed nanotubes, nanowires and two-dimensional graphene flakes. Due to their unique physico-chemical properties, these nanostruc ...

EPFL2012

Standard-free composition measurements of AlxIn1-xN by low-loss electron energy loss spectroscopy

Nicolas Grandjean, Jean-François Carlin

We demonstrate a standard-free method to retrieve compositional information in AlxIn1-xN thin films by measuring the bulk plasmon energy (E-p), employing electron energy loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM). Two se ...

2011

We study in this thesis the structural origin of defect insensitive light emission in indium containing group-III nitride ternary alloys grown on sapphire, which are the active materials for the commercially available high brightness blue diodes. These str ...

EPFL2011

Preparation of homogeneous titania coatings on the surface of MWNTs

László Forró, Duncan Thomas Lindsay Alexander, Jin Won Seo, Klara Hernadi

The aim of this work was to develop a controllable route to produce a stable and inorganic layer on the surface of multi-wall carbon nanotubes. Precursor compounds such as TiBr4, TiCl4, Ti(OiPr)(4), and Ti(OEt)(4) were used to cover the surface of carbon n ...

2010

Although the analogies between the electron energy loss spectra and X-ray absorption spectra were recognized long ago, the possibility to observe the magnetic circular dichroism in the electron microscope was demonstrated only recently. This technique comb ...

2008