FR – Page 12 – TechConnect Briefs

Carbon nanotubes based photocathodes for multisource X-Ray generators

Mazellier J.-P., Thales Research & Technology, FR

Carbon nanotubes (CNT) cathodes are cold field emitters. CNT photocathode consist in combination of CNTs with photodetectors. In a CNT photocathode, the photodetector limits the current that the CNT emit under electric field. As a [...]

Mechanical properties of suspended few layers graphene sheets

Sridi N., Lebental B., Azevedo J., Gabriel J-C, Ghis A., CEA-Grenoble, FR

We present a method for the experimental determination of the mechanical properties of ultrathin films, whichever the material, and a comparative application to graphene sheets obtained with different fabrication and transfer processes.

Increased Bandwidth of Mechanical Harvester

Ahmed Seddik B., Despesse G., Defay E., CEA/Leti-Campus, FR

Mechanical energy harvesters ensure an important electromechanical coupling when their natural frequency matches the input frequency. Nevertheless, in many situations the driving frequency is not known or it might change over time. In that case, [...]

Lipid nanoparticles: tumor-targeting nanocargos for drug and contrast agent delivery

Delmas T., Navarro F., Gravier J., Thomann J.S., Heinrich E., Mérian J., Fraichard A., Boisgard R., Tavitian B., Dufort S., Coll J.L., Bibette J., Boisseau P., Couffin A.C., Texier I., CEA-Grenoble, FR

A new technology for the encapsulation of lipophilic molecules -both drugs and contrast agents dedicated to chemotherapy, phototherapy, or fluorescence imaging in oncology- has been developed, based on oil-in-water nanoemulsions. Thorough physico-chemical characterizations of the [...]

A Model for Enhanced Chemiluminescence Reactions in Microsystems

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

Detection of hybridized targets—like DNA strands—in microsystems for biotechnology is usually done by fluorescence. However, recent investigations have shown that chemiluminescence could be a more effective and sensitive tool for detection under the condition that [...]

Advanced physics for simulation of ultrascaled devices with UTOXPP Solver

Garetto D., Rideau D., Tavernier C., Leblebiciand Y., Schmid A., Jaouen H., IBM corp., FR

As the conventional scaling down of MOSFET dimensions faces physical and economical limits, the performances of novel solutions such as high-K dielectrics, mechanical strain and substrate orientation or alternative device structures, such as fully-depleted SOI [...]

New developments in inkjet of deposits carried out under localised extraction or helium

Conedera V., Mesnilgrente F., Fadel P., Fabre N., LAAS/CNRS, FR

In inkjet, inks used are based on aqueous or organic solvents. Solvents with low boiling point present the drawback of drying quickly and then we can observe the clogging of the orifices of ink jet [...]

Self-alignment of Silicon Chips on Wafers: the Effect of Spreading and Wetting

Berthier J., Brakke K., Sanchez L., Di Cioccio L., CEA-LETI, FR

3D integration appears as the key to advanced microelectronic systems. While robotic methods experience difficulties to accommodate fabrication speed and alignment accuracy, self-assembly methods are promising due to their parallel aspect, which overcomes the main [...]

Accommodation coefficient investigation in rectangular micro-channels for large Knudsen number range

Hadj Nacer M., Graur I., Perrier P., Université de Provence, FR

Experimental and numerical investigations on the flow through rectangular microchannel are presented. The constant volume technique was used to measure the mass flow rate through rectangular microchannel which had gold deposits on the interior surfaces. [...]

The Physics of Pressure Powered Micro-Flow Focusing Device for the Encapsulation of Live Cells

Berthier J., Dalle P., Rivera F., Renaudot R., Morales S., Benhamou P-Y., Caillat P., CEA-LETI, FR

Flow focusing devices (FFD) have emerged as a powerful tool for cell encapsulation and formation of micro-emulsions [1,2]. In the frame of live cell encapsulation, a micro-FFD using alginate solutions for the capsule and powered [...]