AULOMBARD Roger
Organisme : Université Montpellier II
Professeur (HDR)
Autre(s) thème(s) de recherche ou rattachement(s) : - Epitaxie et nanostructuration de matériaux
Roger.Aulombard
univ-montp2.fr
0467143604
Bureau: 10.0, Etg: 1, Bât: 20 - Site : Campus Triolet
Domaines de Recherche: - Physique/Matière Condensée/Science des matériaux
- Physique/Physique/Biophysique
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Dernieres productions scientifiques :
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(112) and (220)/(204)-oriented CuInSe2 thin films grown by co-evaporation under vacuum 
Auteur(s): RUFFENACH S., ROBIN Y., MORET M., AULOMBARD R., BRIOT O.
Conference: E-MRS Spring Meeting (Strasbourg, FR, 2012-05-14)
Actes de conférence: Thin Solid Films, vol. 535 p.143 (2013)
Ref HAL: hal-00820323_v1
Résumé: CuInSe2 (CIS) layers were grown by co-evaporation in a molecular beam epitaxy system onto soda lime glass substrates by using both two-step and three step processes. The physical properties of the layers were investigated using X-ray diffraction (XRD) and optical spectroscopy. The sample atomic composition was assessed by energy dispersive analysis of X-rays. Cu-rich or In-rich CIS thin films were obtained exhibiting strong preferential (112) and (220)/(204) orientations in both cases. We performed thermal annealing at 450 °C under nitrogen, keeping Se overpressure to avoid Se desorption from the layer. The annealed layers all exhibit improved crystalline quality, with reduced stoichiometric discrepancy. The secondary phases like CuxSe1 − x or InxSe1 − x are no more observable by XRD measurements. Regarding the preferential orientation, thermal annealing of Cu-rich CIS layers favours the (112) orientation leading to a more (112) textured layer after annealing, whatever the initial preferential growth orientation was. In opposite, thermal annealing of In-rich samples increases the (220)/(204) texture of the sample.
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Multimicroscopic study of curcumin effect on fixed nonmalignant and cancerous mammalian epithelial cells
Auteur(s): Saab Marie-Belle, Estephan Elias, Bec Nicole, Larroque Marion, AULOMBARD R., CLOITRE T., GERGELY C.
(Article) Publié:
Journal of Biophotonics, vol. p.1-11 (2011)
Ref HAL: hal-00574664_v1
Résumé: The morphology changes, in particular the organization of microtubules in mammalian nonmalignant HMEC 184A1 and cancerous MCF-7 cells during curcumin treat- ment have been investigated by utilizing multiphoton, fluorescence, and atomic force (AFM) microscopies. Fluorescence microscopy reveals formation of ring-like structures of microtubules circumscribing the nuclear area in HMEC 184A1 cells after treatment, while in MCF-7 cells, no important changes were observed. Topo- graphy analyses of fixed HMEC 184A1 and MCF-7 be- fore and after treatment with curcumin were performed using AFM and the effect of the employed cells' fixation method was investigated on MCF-7 cells. Due to its in- depth optical sectioning capacity multiphoton microscopy provided valuable complementary information on curcu- min's effect on both cells' types. Combining information provided by AFM and optical fluorescence and biphoton microscopes allows us to gain a better understanding of the cells and their curcumin-induced changes, especially for microtubules which are the main target of antitumor chemotherapy treatments. Our multimicroscopic study demonstrates that 6 h incubation with curcumin does not induce significant modifications in the interphase micro- tubules in the malignant MCF7cell, whereas it has meas- urable effects on those of the nonmalignant HMEC 184A1 cells, revealing also morphology modifications over the nuclear area of these cells.
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Biomolecular detection using a Metal Semiconductor Field Effect Transistor
Auteur(s): Estephan Elias, Saab Marie-Belle, Buzatu P., Aulombard R., Cuisinier Frédéric, Gergely C., Cloitre T.
Conference: SPIE Photonics Europe (Brussels, BE, 2010-04-12)
Actes de conférence: Proc. of SPIE, Vol.7715, vol. p.77158 (2010)
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Sensing by Means of Nonlinear Optics with Functionalized GaAs/AlGaAs Photonic Crystals
Auteur(s): Estephan Elias, Bajoni D., Saab Marie-belle, Cloitre T., Aulombard R., Larroque Christian, Andreani L. C., Liscidini M., Malvezzi A. M., Gergely C.
(Article) Publié:
Langmuir, vol. p.DOI: 10.1021/la1000792 (2010)
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