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Le Normand F, Djennaoui I, Debry C, Fath L. Inferior turbinate lateralization. Eur Ann Otorhinolaryngol Head Neck Dis 2023:S1879-7296(23)00137-0. [PMID: 37872042 DOI: 10.1016/j.anorl.2023.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
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.
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Affiliation(s)
- F Le Normand
- Service d'Oto-Rhino-Laryngologie et Chirurgie Cervico-Faciale, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1, avenue Molière, 67100 Strasbourg, France.
| | - I Djennaoui
- Service d'Oto-Rhino-Laryngologie et Chirurgie Cervico-Faciale, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1, avenue Molière, 67100 Strasbourg, France
| | - C Debry
- Service d'Oto-Rhino-Laryngologie et Chirurgie Cervico-Faciale, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1, avenue Molière, 67100 Strasbourg, France; Unité Inserm 1121, Biomatériaux et Bioingénierie, Centre de Recherche en Biomédecine de Strasbourg, 1, rue Eugène Boeckel, 67000 Strasbourg, France
| | - L Fath
- Service d'Oto-Rhino-Laryngologie et Chirurgie Cervico-Faciale, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1, avenue Molière, 67100 Strasbourg, France; Unité Inserm 1121, Biomatériaux et Bioingénierie, Centre de Recherche en Biomédecine de Strasbourg, 1, rue Eugène Boeckel, 67000 Strasbourg, France
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Voss E, Vigolo B, Medjahdi G, Hérold C, Marêché JF, Ghanbaja J, Le Normand F, Mamane V. Covalent functionalization of polyhedral graphitic particles synthesized by arc discharge from graphite. Phys Chem Chem Phys 2017; 19:5405-5410. [DOI: 10.1039/c6cp08568g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Occurrence of covalent functionalization of astralenes by radical addition.
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Affiliation(s)
- E. Voss
- Institut Jean Lamour, CNRS-Université de Lorraine
- 54506 Vandœuvre-lès-Nancy
- France
| | - B. Vigolo
- Institut Jean Lamour, CNRS-Université de Lorraine
- 54506 Vandœuvre-lès-Nancy
- France
| | - G. Medjahdi
- Institut Jean Lamour, CNRS-Université de Lorraine
- 54506 Vandœuvre-lès-Nancy
- France
| | - C. Hérold
- Institut Jean Lamour, CNRS-Université de Lorraine
- 54506 Vandœuvre-lès-Nancy
- France
| | - J.-F. Marêché
- Institut Jean Lamour, CNRS-Université de Lorraine
- 54506 Vandœuvre-lès-Nancy
- France
| | - J. Ghanbaja
- Institut Jean Lamour, CNRS-Université de Lorraine
- 54506 Vandœuvre-lès-Nancy
- France
| | - F. Le Normand
- ICube – Equipe Matériaux pour Composants Electroniques et Photovoltaiques (MaCEPV) (ICube)
- CNRS-Université de Strasbourg
- UMR N 7357
- 67081 Strasbourg Cedex
- France
| | - V. Mamane
- Laboratoire SRSMC UMR CNRS 7565
- Université de Lorraine
- 54506 Vandoeuvre-les-Nancy
- France
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Vigolo B, Cojocaru CS, Faerber J, Arabski J, Gangloff L, Legagneux P, Lezec H, Le Normand F. Localized CVD growth of oriented and individual carbon nanotubes from nanoscaled dots prepared by lithographic sequences. Nanotechnology 2008; 19:135601. [PMID: 19636150 DOI: 10.1088/0957-4484/19/13/135601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Using a combination of top-down lithographic techniques, isolated, individual and oriented multi-wall carbon nanotubes (MWNTs) were grown on nickel or iron nanoscaled dots. In the first step of the process, micron-sized catalytic metallic dots (either iron or nickel) were prepared using UV lithography. MWNTs were then synthesized from these catalysts using a direct current plasma-assistance and hot-filament-enhanced chemical vapor deposition (CVD) reactor. Samples were characterized by means of scanning electron microscopy. It turns out that the splitting up of the micron-sized dot is favored in the iron case and that the surface diffusion of the metal is enhanced using ammonia in the gaseous mixture during the CVD process. The results are discussed giving arguments for the understanding of the MWNT growth mechanism. In a second step, a focused ion beam (FIB) procedure is carried out in order to reduce the initial dot size down to submicronic scale and subsequently to grow one single MWNT per dot. It is found that nickel is most appropriate to control the size of the dot. Dots of size 200 nm +/- 40 nm are then required to grow individual MWNTs.
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Affiliation(s)
- B Vigolo
- Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur (ULP), 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex 2, France
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Babaa MR, Bantignies JL, Alvarez L, Parent P, Le Normand F, Gulas M, Mane Mane J, Poncharal P, Doyle BP. NEXAFS study of multi-walled carbon nanotubes functionalization with sulfonated poly(ether ether ketone) chains. J Nanosci Nanotechnol 2007; 7:3463-3467. [PMID: 18330158 DOI: 10.1166/jnn.2007.816] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Functionalization of multi-walled carbon nanotubes (MWNTs) surface by sulfonated poly (ether ether ketone) SPEEK chains using a direct attachment reaction was investigated. A two step method was performed. MWNTs were oxidized by a nitric acid treatment to generate carboxyl groups on their surface. The grafting reaction of sulfonated groups of SPEEK with carboxyl groups present on the surface of oxidized MWNTs readily proceeds by using hexane diamine as an interlinking molecule. Transmission electron microscopy (TEM) shows that tubes are wrapped by polymer chains. Near edge X-ray absorption fine structure spectroscopy (NEXAFS) at the C K-edge, O K-edge, and N K-edge and X-ray photoelectron spectroscopy (XPS) were used to give evidence of covalent functionalization of MWNTs by SPEEK macromolecules.
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Affiliation(s)
- M R Babaa
- Laboratoire des Colloïdes Verres et Nanomatériaux, Université Montpellier II, cc026, Place Eugène Bataillon, 34095 Montpellier, France
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Enouz S, Bantignies JL, Babaa MR, Alvarez L, Parent P, Le Normand F, Stéphan O, Poncharal P, Loiseau A, Doyle BP. Spectroscopic study of nitrogen doping of multi-walled carbon nanotubes. J Nanosci Nanotechnol 2007; 7:3524-3527. [PMID: 18330168 DOI: 10.1166/jnn.2007.839] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Combined spatially resolved electron-energy loss spectroscopy (EELS) and high resolution near-edge X-ray absorption fine structure (NEXAFS) spectroscopy have been used to investigate the nitrogen doping of multi-walled carbon nanotubes (N-MWNT). EELS indicates that most of the tubes are nitrogen-doped. NEXAFS spectroscopy reveals pyridine-like and nitrile N structures. High resolution NEXAFS experiments show that the main nitrogen concentration originates from a high amount of molecular N2 encapsulated into only a small quantity of tubes.
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Affiliation(s)
- S Enouz
- Laboratoire des Colloïdes Verres et Nanomatériaux, Université Montpellier II, cc026, Place Eugène Bataillon, 34095 Montpellier, France
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Svrcek V, Kleps I, Cracioniou F, Paillaud JL, Dintzer T, Louis B, Begin D, Pham-Huu C, Ledoux MJ, Le Normand F. Monitoring the chemical vapor deposition growth of multiwalled carbon nanotubes by tapered element oscillating microbalance. J Chem Phys 2006; 124:184705. [PMID: 16709129 DOI: 10.1063/1.2192515] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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 microg). Growths in the TEOM microreactor are investigated with catalytic particles (Fe, Ni) dispersed on different supports. First, high surface area FeAl2O3 or Fe (Ni) exchanged on zeolite powders is used. Second, growths are performed on array of nickel dots or FeSi-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 FeAl2O3 catalyst. A linear dependence of the MWCNT growth an (P(C2H6)/P(H2))(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.
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Affiliation(s)
- V Svrcek
- Nanoarchitectronics Research Center, AIST, Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305 8565, Japan.
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Cojocaru CS, Senger A, Le Normand F. A nucleation and growth model of vertically-oriented carbon nanofibers or nanotubes by plasma-enhanced catalytic chemical vapor deposition. J Nanosci Nanotechnol 2006; 6:1331-8. [PMID: 16792361 DOI: 10.1166/jnn.2006.144] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Carbon nanofibers are grown by direct current and hot filaments-activated catalytic chemical vapor deposition while varying the power of the hot filaments. Observations of these carbon nanofibers vertically oriented on a SiO2 (8 nm thick)/Si(100) substrate covered with Co nanoparticles (10-15 nm particle size) by Scanning Electron and Transmission Electron Microscopies show the presence of a graphitic "nest" either on the surface of the substrate or at the end of the specific nanofiber that does not encapsulate the catalytic particle. Strictly in our conditions, the activation by hot filaments is required to grow nanofibers with a C2H2 - H2 gas mixture, as large amounts of amorphous carbon cover the surface of the substrate without using hot filaments. From these observations as well as data of the literature, it is proposed that the nucleation of carbon nanofibers occurs through a complex process involving several steps: carbon concentration gradient starting from the catalytic carbon decomposition and diffusion from the surface of the catalytic nanoparticles exposed to the activated gas and promoted by energetic ionic species of the gas phase; subsequent graphitic condensation of a "nest" at the interface of the Co particle and substrate. The large concentration of highly reactive hydrogen radicals mainly provided by activation with hot filaments precludes further spreading out of this interfacial carbon nest over the entire surface of the substrate and thus selectively orientates the growth towards the condensation of graphene over facets that are perpendicular to the surface. Carbon nanofibers can then be grown within the well-known Vapor-Liquid-Solid process. Thus the effect of energetic ions and highly reactive neutrals like atomic hydrogen in the preferential etching of carbon on the edge of graphene shells and on the broadening of the carbon nanofiber is underlined.
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Affiliation(s)
- C S Cojocaru
- Groupe Surfaces and Interfaces, IPCMS, UMR 7504, CNRS, Bat 70, 23, rue du Loess, 67034 Strasbourg Cedex, France
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Singh MK, Titus E, Tyagi PK, Palnitkar U, Misra DS, Roy M, Dua AK, Cojocaru CS, Le Normand F. Ni and Ni/Pt filling inside multiwalled carbon nanotubes. J Nanosci Nanotechnol 2003; 3:165-170. [PMID: 12908246 DOI: 10.1166/jnn.2003.200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Multiwalled carbon nanotubes are grown by microwave plasma chemical vapor deposition with CH4 and H2 as precursor gases. Ni and Ni/Pt electroplated layers are used as catalysts for the synthesis of the tubes. We observe that a very efficient filling of the tubes takes place with Ni. In some cases Ni/Pt filling is also observed inside the tubes. High-resolution transmission electron microscopy (HRTEM) studies, coupled with energy-dispersive X-ray analyses of the tubes, indicate Ni nanorods with a highly symmetrical cylindrical structure. The diameter of the cylindrical nanorods is on the order of 40 nm, and their length is 660 nm. The nano area diffraction pattern of the nanorods reveals the cubic structure of nickel, and electron diffraction spots corresponding to (111), (200), (220) planes are evident. The lattice constant of Ni measured from the diffraction spots was found to be 0.347 +/- 0.0013 nm. This should be compared with 0.352 nm, the value of "a" in bulk Ni. The decrease in the lattice constant may be due to the strain experienced inside the tubes. Raman spectroscopy shows the typical signature of the tangential breathing mode present in the tubes at 1580 cm-1 that shifts to a new position when the C12 is replaced by 13C. The shift, however, is too small and is difficult to explain on the basis of mass difference. HRTEM experiments indicate the presence of Ni3C in the samples dominantly in the interfacial region.
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Affiliation(s)
- Manoj K Singh
- Physics Department, Indian Institute of Technology, Bombay Mumbai-400 076, India
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Romeo M, Arnault JC, Ehret G, Banhart F, Le Normand F. Local lattice distortions in spherical carbon nanoparticles as studied by HRTEM image analysis. Ultramicroscopy 2002; 92:209-13. [PMID: 12213022 DOI: 10.1016/s0304-3991(02)00134-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The study of lattice distortions in structures with spherical or cylindrical geometry is of growing interest in the field of carbon nanoparticles (onions, nanotubes, etc.). We report an image analysis procedure entirely performed in reciprocal space which provides a global map of the inter-shell distances in carbon nanoparticles. This procedure is applied to carbon nanoparticles with a size of 100 nm that are generated under CVD conditions and exhibit positive as well as negative curvature of the basal lattice planes. These nanoparticles are subjected to intense electron irradiation under the beam of a high-voltage electron microscope with an acceleration voltage of 1.25 MeV. We observe a compression in their centre and a dilation of the outer shells. The reciprocal-space analysis of the high-resolution electron microscopy images opens the way to investigate the stability and equilibrium structure of carbon nanoparticles and to conclude on the formation mechanism.
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Le Normand F, Barrault J, Breault R, Hilaire L, Kiennemann A. Catalysis with palladium deposited on rare earth oxides: influence of the support on reforming and syngas activity and selectivity. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100154a050] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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El Fallah J, Boujana S, Dexpert H, Kiennemann A, Majerus J, Touret O, Villain F, Le Normand F. Redox Processes on Pure Ceria and on Rh/CeO2 Catalyst Monitored by X-Ray Absorption (Fast Acquisition Mode). ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100072a020] [Citation(s) in RCA: 165] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Le Normand F, Constant L, Ehret G, Romeo M, Charai A, Saikaly W, Speisser C. Investigation of carbon aggregates (onions) formed on copper under the conditions of diamond chemical vapour deposition. ACTA ACUST UNITED AC 1999. [DOI: 10.1080/01418619908210389] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kili K, Hilaire L, Le Normand F. Modification by lanthanide (La, Ce) promotion of catalytic properties of palladium: Characterization of the catalysts. Phys Chem Chem Phys 1999. [DOI: 10.1039/a808507b] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Affiliation(s)
- J. C. Arnault
- Groupe Surfaces-Interfaces, Institut de Physique et Chimie des Matériaux de Strasbourg, IPCMS-GSI, UMR 7504, Bat 69, 23, rue du Loess, 67037 Strasbourg, France
| | - S. Hubert
- Groupe Surfaces-Interfaces, Institut de Physique et Chimie des Matériaux de Strasbourg, IPCMS-GSI, UMR 7504, Bat 69, 23, rue du Loess, 67037 Strasbourg, France
| | - F. Le Normand
- Groupe Surfaces-Interfaces, Institut de Physique et Chimie des Matériaux de Strasbourg, IPCMS-GSI, UMR 7504, Bat 69, 23, rue du Loess, 67037 Strasbourg, France
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Dauscher A, Hilaire L, Le Normand F, Müller W, Maire G, Vasquez A. Characterization by XPS and XAS of supported Pt/TiO2CeO2 catalysts. SURF INTERFACE ANAL 1990. [DOI: 10.1002/sia.740160173] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Mod RR, Ory RL, Morris NM, Normand FL. Chemical properties and interactions of rice hemicellulose with trace minerals in vitro. J Agric Food Chem 1981; 29:449-454. [PMID: 6265517 DOI: 10.1021/jf00105a004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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