FR – Page 26 – TechConnect Briefs

Dimensioning of a New Micro-Needle for the Dispense of Drugs in Tumors and Cell Clusters

Berthier J., Rivera F., Caillat P., Berger F., CEA-LETI, FR

In medical treatment, there is a constant need to deliver active molecules into targeted cells, but this dispense is often difficult and time consuming. For example, in cancerology, it has been shown that active molecules [...]

Johnson-Kendall-Roberts Theory Applied to Living Cells

Chu Y-S, Dufour S., Thiery J.-P., Perez E., Pincet F., Laboratoire de Physique Statistique de l'ENS, FR

Cell adhesion is involved in a number of biological processes ranging from transport to the defenses of organisms. A quantitative understanding of the adhesion of cells is not often possible owing to their complexity in [...]

NANOPOLIS: An Infrastructure for Communication in the Nanotech World

Bog D., Ciontu F., iMediasoft Group, FR

Nanopolis is a distributed knowledge network aiming at transposing today’s knowledge on matter exploration at the atomic scale into a virtual representation space. The project is focused on mitigating the impact of some of the [...]

Elasto-plastic Properties of Electroplated and Polycrystalline Nickel using Numerical Modelling of the Nanoindentation Test Coupled with an Inverse Method

Qasmi M., Delobelle P., Richard F., Université de Franche-Comté, FR

The aim of this paper is a wide investigation of the nano scale of the elastoplastic properties of electroplated Nickel, which is extensively used in the LIGA techniques and polycrystalline hardened and annealed Nickel with [...]

Adsorption of PTDCA on Si(100) and Si(100)-H

Soubiron T., Vaurette F., Grandidier B., Wallart X., Nys J.P., Stiévenard D., IEMN (UMR8520, CNRS), Dpt ISEN, FR

Submonolayer coverages of perylene-tetracarboxylic-dianhydride (PTCDA) molecules have been investigated with scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). At high coverage, X-ray measurements indicate that only a fraction of the molecules are chemisorbed and [...]

Structural and Mechanical Properties of Double Wall Carbon Nanotubes

Bacsa R.R., Bacsa W.S., Flahaut E., Laurent Ch., Peigney A., Puech P., Bacsa R.R., Bacsa W.S., LPST Université Paul Sabatier, FR

Narrow diameter double walled carbon nanotubes can now be grown by the catalytic chemical vapor deposition process with high yield. Double walled carbon nanotubes are the molecular analogs to coaxial cables and they can also [...]

A Carbon Nanotube-Based Sensor for Measuring Forces Developed by Cells

Roman C., Ciontu F., Courtois B., Tima Laboratory, FR

We propose and validate through atomistic modeling and simulation a novel carbon nanotube-based sensor for measuring forces in the pico-Newton range, distributed over lengths ranging from nano-meters up to micro-meters. The mechanical behavior is modeled [...]

First-Principles Molecular-Dynamics Simulations of a Hydrous Silica Melt: Hydrogen Diffusion Mechanisms and Electronic Properties

Pohlmann M., Schober H., Benoit M., Kob W., Institut Laue-Langevin, FR

We study a sample of liquid silica containing 3.84 wt.% H20 with ab initio molecular dynamics simulation in its liquid state at temperatures of 3000 K and 3500 K. at these temperatures the liquid can [...]

A Sub-40nm Nanostructured La0.7Sr0.3MnO3 Planar Magnetic Memory

Arnal T., Bibes M., Lecoeur Ph., Mercey B., Prellier W., Haghiri-Gosnet A.M., Institut d'Electronique Fondamentale IEF/UMR8622, FR

A single-step nanolithography planar process, which allows generating the core-element of a spin-polarized magnetic memory in the fully spin-polarized La0.7Sr0.3MnO3 (LSMO) manganite, is reported. Taking benefit of the proximity effects due to backscattered electrons, a [...]

Local Optical Field in the Neighborhood of Structured Surfaces: Phase Singularities and Talbot Effect

Levine B., Caumont M., Amien C., Chaudret B., Dwir B., Bacsa W.S., LPST Université Paul Sabatier, FR

We have probed the local optical field in the vicinity of structured surfaces to observe optical coherence effects. We have used a sub -wavelength sized optical fiber probe to map the local field of microgratings [...]