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References

2013

Articles:

Hamdan, A., Kosior, F., Noel, C., Henrion, G., Audinot, J.-N., Gries, T. and Belmonte, T.
Journal of Applied Physics, 113:213303
2013

Resume: The main processes related to discharges between pin and plate electrodes in hydrocarbon liquid (heptane) are modelled for micro-gap (from 10 to 100 mu m) conditions. When a plasma channel hits the surface, a micro-crater is created. The different phenomena controlling the geometry (shape and dimension) of a single crater are described and included in a theoretical model developed for the specific case of pure aluminium. The influence of the most important parameters affecting the geometry of the crater is discussed. Among them, one finds the pressure exerted by the plasma on the liquid metal. It is found that the distribution of the pressure applied on the liquid pool changes significantly the way the plasma shapes the pool. It is assumed that at high charges, the pressure profile is tilted from the channel axis, leading to the formation of a central protrusion. On the other hand, we demonstrate that Thomson-Marangoni forces play an important role for crater diameters smaller than 5 mu m. Then, the choice of the first derivative of the surface tension with respect to the temperature is a key factor. This effect is strongly related to the way convection displaces matter in the liquid pool. Finally, the quenching step is sufficiently fast to freeze the liquid shape as soon as the plasma vanishes. (C) 2013 AIP Publishing LLC.

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Hamdan, A., Kosior, F., Noel, C., Henrion, G., Audinot, J-N, Gries, T. and Belmonte, T.
JOURNAL OF APPLIED PHYSICS, 113(21) Belmonte, T (Reprint Author), Univ Lorraine, CNRS, Dept CP2S, Inst Jean Lamour, Parc Saurupt,CS 50840, F-54011 Nancy, France. Hamdan, A.; Kosior, F.; Noel, C.; Henrion, G.; Gries, T.; Belmonte, T., Univ Lorraine, CNRS, Dept CP2S, Inst Jean Lamour, F-54011 Nancy, France. Audinot, J-N, Ctr Rech Publ Gabriel Lippmann, SAM Dept, L-4422 Belvaux, Luxembourg.
2013

Resume: The main processes related to discharges between pin and plate electrodes in hydrocarbon liquid (heptane) are modelled for micro-gap (from 10 to 100 mu m) conditions. When a plasma channel hits the surface, a micro-crater is created. The different phenomena controlling the geometry (shape and dimension) of a single crater are described and included in a theoretical model developed for the specific case of pure aluminium. The influence of the most important parameters affecting the geometry of the crater is discussed. Among them, one finds the pressure exerted by the plasma on the liquid metal. It is found that the distribution of the pressure applied on the liquid pool changes significantly the way the plasma shapes the pool. It is assumed that at high charges, the pressure profile is tilted from the channel axis, leading to the formation of a central protrusion. On the other hand, we demonstrate that Thomson-Marangoni forces play an important role for crater diameters smaller than 5 mu m. Then, the choice of the first derivative of the surface tension with respect to the temperature is a key factor. This effect is strongly related to the way convection displaces matter in the liquid pool. Finally, the quenching step is sufficiently fast to freeze the liquid shape as soon as the plasma vanishes. (C) 2013 AIP Publishing LLC.

Equipe: Centre de Compétences : ERMIONE informatique et calcul

Sukhostavets, O.V., Pigeau, B., Sangiao, S., De Loubens, G., Naletov, V.V., Klein, O., Mitsuzuka, K., Andrieu, S., Montaigne, F. and Guslienko, K.Y.
Physical Review Letters, 111(24)
2013

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

Sukhostavets, O.V., Pigeau, B., Sangiao, S., De Loubens, G., Naletov, V.V., Klein, O., Mitsuzuka, K., Andrieu, S., Montaigne, F. and Guslienko, K.Y.
Physical Review Letters, 111(24)
2013

Equipe: Centre de Compétences : MiNaLor micro et nanotechnologies

Hamdan, A., Noel, C., Ghanbaja, J., Migot-Choux, S. and Belmonte, T.
Materials Chemistry and Physics, 142:199-206
2013

Resume: Micro-gap discharges created in heptane between two platinum pin-electrodes produce platinum particles embedded in an amorphous carbon matrix which exhibits a short-range order. The platinum particles can be sorted by size. The largest ones (>100 nm in diameter) are created by emission of droplets from the liquid pool formed when the discharge hits the electrode surface. They are submitted to high stress levels by fast thermal quenching. The smallest ones (<5 nm) are synthesized in the plasma. Nanoparticles with diameters ranging from 10 to 20 nm have structure defects and are synthesized in post-discharge where huge temperature gradients exist. The short-range order observed in carbon extends typically over 3 nm, and it is observed by high-resolution transmission electron microscopy. This ordered structure of carbon (and a fortiori sp(3) bonds which are identified by FTIR analyses) is clearly visible around the smallest nanoparticles and it is likely formed at the same location, i.e. in the plasma. (C) 2013 Elsevier B.V. All rights reserved.

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Wang, F., Liu, G., Rothwell, S., Nevius, M., Tejeda, A., Taleb-Ibrahimi, A., Feldman, L. C., Cohen, P. I. and Conrad, E. H.
NANO LETTERS, 13(10):4827-4832
2013
ISSN: 1530-6984

Equipe: Département P2M : Surfaces et Spectroscopies

2012

Articles:

KENFAUI, D., LENOIR, B., CHATEIGNER, D., OULADDIAF, B., GOMINA, M. and NOUDEM, J. G.
Journal of the European Ceramic Society, 32:2405
2012

Equipe: Département CP2S : Matériaux à propriétés thermoélectriques

Stoffel, M., Fagot-Revurat, Y., Tejeda, A., Kierren, B., Nicolaou, A., Le Fèvre, P., Bertran, F., Taleb-Ibrahimi, A. and Malterre, D.
PHYSICAL REVIEW B, 86(19)
2012
ISSN: 1098-0121

Equipe: Département P2M : Surfaces et Spectroscopies

Srour, W., Tejeda, A., Nicolaou, A., Le Fèvre, P., Bertran, F., Taleb-Ibrahimi, A. and Malterre, D.
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 185(11):441-447
2012
ISSN: 0368-2048

Equipe: Département P2M : Surfaces et Spectroscopies

Duluard, A., Negulescu, B., Bellouard, C., Hehn, M., Lacour, D., Lu, Y., Lengaigne, G., Montaigne, F., Robert, S., Suire, S. and Tiusan, C.
Applied Physics Letters, 100(7)
2012

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

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