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Your search keyword '"Le Normand, F."' showing total 145 results
Start Over Author "Le Normand, F." Publication Type Academic Journals
145 results on '"Le Normand, F."'

10. Inferior turbinate lateralization.

Author

Le Normand, F., Djennaoui, I., Debry, C., and Fath, L.

Subjects
THERAPEUTICS, SURGICAL complications, RHINOPLASTY, HYPERTROPHY
Abstract

Inferior turbinate lateralization via an endonasal approach is a reliable low-risk procedure to correct inferior turbinate hypertrophy resistant to medical treatment. This well-established technique provides nasal comfort while conserving the mucosal membrane and physiology of the inferior turbinate, minimizing the postoperative complications (empty nose syndrome) besetting turbinoplasty involving mucosal or submucosal reduction. [ABSTRACT FROM AUTHOR]

Published
2024
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45. Monitoring the chemical vapor deposition growth of multiwalled carbon nanotubes by tapered element oscillating microbalance.

Author

Sˇvrcˇek, V., Kleps, I., Cracioniou, F., Paillaud, J. L., Dintzer, T., Louis, B., Begin, D., Pham-Huu, C., Ledoux, M.-J., and Le Normand, F.

Subjects
CHEMICAL vapor deposition, VAPOR-plating, CARBON, NANOTUBES, FULLERENES, OSCILLATIONS
Abstract

The growth of multiwalled carbon nanotubes (MWCNTs) produced by a catalytic chemical vapor deposition (CCVD) process has been monitored using a tapered element oscillating microbalance (TEOM) probe. This technique displays a high sensitivity (<1 μg). Growths in the TEOM microreactor are investigated with catalytic particles (Fe, Ni) dispersed on different supports. First, high surface area Fe/Al2O3 or Fe (Ni) exchanged on zeolite powders is used. Second, growths are performed on array of nickel dots or Fe/Si-nc particles dispersed on large holes patterned on Si(100) substrates. An accurate monitoring of the early stages of growth permits a precise evaluation of the growth rates and shows substantial differences between these samples which greatly differ by the surface area. On catalysts dispersed on Si(100) the mass uptake is linear throughout the process. On high surface area catalysts, however, a saturation of the mass uptake is indifferently observed. This saturation is explained either by diffusion limitation by the growing MWCNTs or by internal diffusion through the pores or external diffusion through the grains of the catalyst. The kinetic dependence with partial pressure of the incoming C2H6:H2 gas mixture is then explored on the Fe/Al2O3 catalyst. A linear dependence of the MWCNT growth an (PC2H6/PH2)1/2 is found. A simple model is then developed that accounts for this dependence only if an associative and competitive adsorption of ethane is the rate determining step of the overall process. These results thus bring insight to improve and control the CCVD growth kinetics of MWCNTs. [ABSTRACT FROM AUTHOR]

Published
2006
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46. Filling and capping multiwall carbon nanotubes with silicon nanocrystals dispersed in SiO2-based spin on glass.

Author

Sˇvrcˇek, V., Pham-Huu, C., Amadou, J., Begin, D., Ledoux, M.-J., Le Normand, F., Ersen, O., and Joulié, S.

Subjects
SILICON, CRYSTALS, NANOPARTICLES, ELECTRONIC equipment, ELECTRON microscopy, AMMONIA
Abstract

Silicon nanocrystals (Si-ncs) are particularly interesting not only for their optical properties but also because recent developments have made possible the production of optoelectronic devices. In the present work, an approach is proposed either to introduce Si-ncs at room temperature inside the multiwall carbon nanotubes (MWCNTs) or to cap Si-nc on one open end of MWCNT. The Si-ncs dispersed in SiO2-based spin on glass solution have been preliminary disaggregated in an ammonia solution and contacted with open MWCNTs with different average inner diameters (IDs) within an ID range of 6–40 nm. The ends of MWCNTs have been opened by a thermal annealing at appropriate temperatures that are previously evaluated from thermogravimetric investigations. On the tip of MWCNTs of small inner diameters it has been possible to stick a single Si-nc and cap the open end of the tube (Si-nc/MWCNT), whereas with increasing IDs of MWCNTs, Si-ncs were introduced inside the tubule (Si-ncs-MWCNT). High resolution transmission electron microscopy and diffraction patterns provide evidence for many Si-ncs incorporated inside the MWCNTs. The capillary forces provided by the opening of the MWCNTs are strong enough to attract and even more to carry the Si-ncs within nanotubes far from their mouth. Photoluminescence properties of Si-nc inside the MWCNTs are investigated at room temperature. Implications on the interest of their composite material, Si-ncs-MWCNT, are discussed in terms of chemical and mechanical stabilizations, wiring, and handling single Si-nc. [ABSTRACT FROM AUTHOR]

Published
2006
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49. Proton irradiation of CVD diamond detectors for high-luminosity experiments at the LHC

Author

Meier, D., Adam, W., Bauer, C., Berdermann, E., Bergonzo, P., Bogani, F., Borchi, E., Bruzzi, M., Colledani, C., Conway, J., Dabrowski, W., Delpierre, P., Deneuville, A., Dulinski, W., van Eijk, B., Fallou, A., Foulon, F., Friedl, M., Jany, C., Gan, K.K., Gheeraert, E., Grigoriev, E., Hallewell, G., Hall-Wilton, R., Han, S., Hartjes, F., Hrubec, J., Husson, D., Kagan, H., Kania, D., Kaplon, J., Kass, R., Knöpfle, K.T., Krammer, M., Manfredi, P.F., Marshall, R.D., Mishina, M., Le Normand, F., Pan, L.S., Palmieri, V.G., Pernegger, H., Pernicka, M., Peitz, A., Pirollo, S., Pretzl, K., Re, V., Riester, J.L., Roe, S., Roff, D., Rudge, A., Schnetzer, S., Sciortino, S., Speziali, V., Stelzer, H., Stone, R., Tapper, R.J., Tesarek, R., Thomson, G.B., Trawick, M., Trischuk, W., Turchetta, R., Walsh, A.M., Wedenig, R., Weilhammer, P., Ziock, H., and Zoeller, M.

Published
1999
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