Publications by authors named "Robin Cours"
Article Synopsis
- Researchers developed new types of probes made from all-graphenic carbon morphologies attached to individual carbon nanotubes, which may enhance scanning probe microscopy (SPM) techniques.
- They tested three methods for mounting these probes, two involving focused ion/electron beams and one using an optical microscope, highlighting the pros and cons of each method.
- Analysis showed the carbon cone structures were highly sensitive to ion and electron irradiation, likely due to many free graphene edges, suggesting that these carbon cones could outperform traditional probes like silicon or diamond in SPM applications.
Hypothesis: The capability of making 3D directed assembly of colloidal nanoparticles on surfaces, instead of 2D one, is of major interest to generate, tailor, and enhance their original functionalities. The nanoxerography technique, i.e.
View Article and Find Full Text PDFWe report the use of a pyrolytic carbon cone nanotip as field emission cathode inside a modern 200 kV dedicated scanning transmission electron microscope. We show an unprecedented improvement in the probe current stability while maintaining all the fundamental properties of a cold field emission source such as a small angular current density together with a high brightness. We have also studied the influence of the low extraction voltage, as enabled by the nanosized apex of the cones, on the electron optics properties of the source that prevent the formation of a virtual beam cross-over of the gun.
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