Dissertations / Theses on the topic 'Spectromètre de masse d'ions secondaires'
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Verzeroli, Elodie. "Source NAPIS et Spectromètre PSI-TOF dans le projet ANDROMEDE." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS221/document.
Full textThe goal of the ANDROMEDE project is to create a new instrument for sub-micrometric ion imaging and analysis by mass spectrometry, using ion impacts on nano-objects present in the solid sample surface and more particularly on biological samples. In-vitro and in-vivo analysis of these types of samples require mostly complex preparation and even atmospheric pressure experimentation. This unique instrument opens a new path for surface analysis characterization, which is complementary to the standard methods and technics used today.In the ANDROMEDE project, two elements have been developed in our study. The NAPIS source which delivers the nanoparticles allowing the increase of the secondary ion yield and the PSI-TOF mass spectrometer for the chemical analysis of the elements emitted from the sample surface.The NAPIS source delivers a primary beam of accelerated nanoparticles in a Pelletron 4MeV accelerator which is driven to a target. The NAPIS nanoparticles source has been developed and validated independently in the ORSAY PHYSICS Company firstly before its coupling on the accelerator. The new extraction optics called ExOTOF as well as the PSI-TOF orthogonal extraction mass spectrometer have been developed for the reliable secondary ions study and the increase of the mass resolution.These instruments have been specially designed for this project. This development will allow an efficient extraction and analysis of the secondary ions emitted from the sample surface using continuous primary beams and will have applications for atmospheric pressure studies. The assembly has been completely validated and the first tests of the output beam have been successfully carried out
Marie, Yannick. "Étude de la formation des ions MCs+ en spectromètrie de masse d'ions secondaires : application à la quantification." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL124N.
Full textVerruno, Marina. "Investigation of the enhancement of the performance of the SIMS instruments." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS400/document.
Full textSecondary ion mass spectrometry (SIMS) instruments need to be improved in order to satisfy the demands of trends in many fields that require analytical tools that can map samples with both excellent resolution and high-sensitivity chemical information, but also with shorter time of analysis. The objectives of this thesis are: investigate the enhancement of the mass resolution of double focusing mass spectrometers by replacing the standard spherical sector with a novel spheroid geometry which has better focusing properties, and to investigate the reduction of the time of analysis in imaging SIMS by the proof-of-concept of the SIMS multi-ion- beam system.A comparison of the main focusing properties of the spherical sector, the spheroid geometry and a hybrid spheroid geometry, was made using the SIMION software. A comparison in a Nier-Johnson configuration between the spherical sector and the spheroid, showed that the beam presents a rotation of 90° at the exit of the magnet harming the mass resolution in the spheroid configuration. By adding an electrostatic element that can rotate the beam 90° the performance of the mass spectrometer could be improved. However, a comparison of the performances between the spherical and hybrid sectors simulated in a Mattauch-Herzog configuration, showed that when the double focusing condition is properly satisfied, better mass resolution could be achieved with the spheroid geometry.A multi-ion-beam system was investigated for SIMS analysis. A simulation through the secondary optics of a Cameca IMS XF showed successful transmission of nine beams through the optics resulting in nine well focussed spots on the multi channel plate (MCP) detector. The proof-of-concept was completed experimentally in the Cameca IMS 6F, where a multi-hole aperture was mounted in the primary column generating 9 and 16 beams of sizes between 4 μm to 10 μm. Images of an AlCu grid were obtained when t the multi-ion-beam system was scanned over the sample. These results showed that the multi-ion-beam system is a feasible technique for imaging SIMS and by optimizing the design multi-nano-ion-beams will be a solution for reducing drastically the time of analysis
Gisbert, Rémy. "Optimisation d'une source d'ions à décharge luminsescente pour spectromètre de masse." Grenoble 1, 1992. http://www.theses.fr/1992GRE10118.
Full textBoust, Fabrice. "Microscopie ionique à balayage à haute résolution spatiale : obtention simultanée d'images filtrées par un spectromètre de masses à fort pouvoir séparateur." Paris 11, 1989. http://www.theses.fr/1989PA112327.
Full textGimenez, Christian. "Etude par spectrométrie de masse d'ions secondaires de l'hydroxylation de tiO:(2) (100)." Dijon, 1985. http://www.theses.fr/1985DIJOS056.
Full textEs-Saadani, Aali. "Etude par spectrométrie de masse d'ions secondaires des contacts tungstène/silicium et tungstène/chrome/silicium." Lyon, INSA, 1988. http://www.theses.fr/1988ISAL0064.
Full textEs-Saadani, Aali. "Etude par spectrométrie de masse d'ions secondaires des contacts tungstène/silicium et tungstène/chrome/silicium." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376135329.
Full textLemaire, Joël. "Ionisation multiphotonique résonnante : application à la dissociation unimoléculaire d'ions polyatomiques." Paris 11, 1986. http://www.theses.fr/1986PA112345.
Full textAmaral, Ademir de Jesus. "Application de la spectrométrie de masse d'ions secondaires dans la détection et la mesure de l'uranium dans les milieux biologiques." Paris 12, 1997. http://www.theses.fr/1997PA120055.
Full textGitton, Laure. "Etude par spectrométrie de masse d'ions secondaires de l'hydroxylation de TiO2 : influence de l'orientation cristalline et perturbation par l'acide fluorhydrique." Dijon, 1986. http://www.theses.fr/1986DIJOS042.
Full textMatolin, Vladimir. "Application de la spectrométrie de masse d'ions secondaires à l'étude de l'oxydation catalytique de CO sur particules de palladium." Aix-Marseille 3, 1987. http://www.theses.fr/1987AIX30062.
Full textDümmler, Wolfram. "Étude par spectrométrie de masse d'ions secondaires des interfaces Ti/Si₃N₄, Ag/Si₃N₄ et Cu/Si₃N₄." Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL046N.
Full textMatolin, Vladimir. "Application de la spectrométrie de masse d'ions secondaires à l'étude de l'oxydation catalytique de CO sur particules de palladium." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376078399.
Full textPrudon, Gilles. "Etude de la sensibilité et de la résolution en profondeur lors de l'analyse par spectrométrie de masse des ions secondaires : application à la silice et au silicium." Lyon, INSA, 1990. http://www.theses.fr/1990ISAL0009.
Full textDurantel, F. "Réalisation d'un dispositif de test de cibles pour la production d'ions radioactifs par la méthode ISOL." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2005. http://tel.archives-ouvertes.fr/tel-00009664.
Full textJomard, François. "La spectrométrie de masse d'ions secondaires : application à l'étude de l'interaction de H218O avec TiO2(100) et de dépôts métalliques supportés par des oxydes." Dijon, 1990. http://www.theses.fr/1990DIJOS039.
Full textBodin, Audrey. "Un dispositif de filtre en énergie couplé à un spectromètre de masse quadrupolaire pour le dépôt d'ions moléculaires sur des surfaces isolantes avec énergie contrôlée." Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2224/.
Full textMolecular electronics is an alternative technology for nanoelectronics. It requires the conception of new equipments in order to deposit large and fragile molecules on insulating surfaces under ultra high vacuum (UHV). Keeping intact the deposited molecules is essential for the functionality of the fabricated devices. The most generally used deposition technique for molecules under UHV is thermal evaporation. However, this technique is often detrimental for fragile molecules. The development of less destructive deposition methods is therefore needed. An alternative technique is based on the use of a dedicated mass spectrometer. The commercial device used for our study is a Finnigan triple quadrupole mass spectrometer TSQ700 coupled to a multi-chamber equipment under UHV called " Dinamo " UHV Factory. To transform the TSQ700 in a low energy ion source, we studied the energy distribution of the ions at the exit of the analyzer by using the simulation software SIMION(r). This study revealed that the ion beam displays a high energy tail up to 1500 eV. The ion beam must then be filtered in energy in order to remove the high energy tail. To filter the ions in energy, we decided to add an electrostatic sector. The ion current measured at the output of electrostatic sector showed that the high-energy tail has been removed after this modification. The modified spectrometer was used to deposit CF3+ ions on a KBr(001) surface then characterized by Non-Contact Atomic Force Microscopy (NC-AFM) and Kelvin Probe Force Microscopy (KPFM). KPFM observations are consistent with the presence of positive charges
Ecker, Paul. "Etude de la répercussion des propriétés moléculaires et des caractéristiques de la pulvérisation sur la détection des ions MCs+ et MCs+2 en spectrométrie de masse d'ions secondaires." Metz, 1998. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1998/Ecker.Paul.SMZ9847.pdf.
Full textSecondary Ion Mass Spectrometry (SIMS) is a surface and interface analysis technique, the main quality of which is its sensitivity. Its principal weakness lies in the difficulty of quantification. Under Cs+ primary bombardment, this problem is strongly reduced by the monitoring of MCs+ and MCs2+ molecular ions. The aim of this work is the study of these ions through their molecular properties as well as through their formation mechanism. The stability of these molecular ions is studied by qualitative considerations supported by numerical modelling of some representative molecules. It is shown that the relative stabilities of the molecules of a series MCsx+ (x = 0 to 2) can be estimated by the application of basic chemical concepts. This work shows the importance of the formation mechanism to the analytical information carried by these ions. This is pointed out through the detailed study of isotopic ratios determined by M+, MCs+ and MCs2+ ions. These measurements enable us to evaluate the amount of ionie bombardment induced local composition changes on the sample. Finally, the evolution at certain interfaces of the signals corresponding to these ions is used to attribute formation mechanisms to them
Minkala, Jean-Louis. "Spectrometrie de masse quadripolaire d'ions secondaires a des fins d'etude geologique : aide a l'interpretation des experiences d'analyse in-situ du sol de phobos." Orléans, 1988. http://www.theses.fr/1988ORLE2032.
Full textMinkala, Jean Louis. "Spectrométrie de masse quadripolaire d'ions secondaires à des fins d'étude géologique aide à l'interprétation des expériences d'analyse in-situ du sol de Phobos /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37616524d.
Full textECKER, PAUL MULLER JEAN FRANCOIS. "ETUDE DE LA REPERCUSSION DES PROPRIETES MOLECULAIRES ET DES CARACTERISTIQUES DE LA PULVERISATION SUR LA DETECTION DES IONS MCS+ ET MCS+2 EN SPECTROMETRIE DE MASSE D'IONS SECONDAIRES /." [S.l.] : [s.n.], 1998. ftp://ftp.scd.univ-metz.fr/pub/Theses/1998/Ecker.Paul.SMZ9847.pdf.
Full textAhmad, Ahmad. "Etude de la production d'ions négatifs sur des surfaces de carbone dans un plasma d'hydrogène sans Cs à basse pression." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4702/document.
Full textThis thesis deals with negative ions (INs) surface production for applications in controlled fusion. Negative ions (NIs) formed at the sample surface from positive ions bombardment in hydrogen plasma are collected and analyzed with energy mass spectrometer (MS). The NI energy distribution functions (NIDF) measured by the MS are different from those emitted from surface f(E, Θ) due to modifications trajectories and energies which result when NI cross plasma and MS. In order to determine the NIDF emitted by the surface f(E,Θ) using the NIDF measured by MS f''(E), we developed a model that calculates the ion trajectories between the surface and MS detector. Then from a test function f(E,Θ) it is possible to calculate f''(E) and compare it to the experimental one. The critical issue is this method is the choice of f(E, Θ). The approach used in this thesis is the neutral backscattered and sputtered distribution function calculated by SRIM software during a surface bombardment similar to the experimental conditions. The model resulting show a good agreement between experimental and calculated NIDF, and validate our calculations and the choice of SRIM.In order to compare production mechanisms and NIs yields, a comparative study on different carbons materials was performed. Measured NIDFs show the same shape at room temperature. This indicates that the mechanisms involved in the NI production and the contribution of these mechanisms in the NIDF are the same for all materials. The best NI yield at low temperature is observed on DLC surface. The highest NI yield for all temperatures is observed on Boron doped diamond (BDD) surface at 400°C
Herbin, Morgane. "Etude de l’influence de différents modes de synthèse sur la nature de la phase active de catalyseurs à base de molybdène : Caractérisation par couplage de spectroscopies XPS/LEIS/ToF-SIMS." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10069/document.
Full textThe coupling of surface analysis techniques (XPS, LEIS et ToF-SIMS) allowed to characterize the nature of the active phase on Mo-based catalysts according to different modes of synthesis. To imitate chemical means by impregnation mode, model catalysts we prepared by spin-coating. In addition, a new physical path, by magnetron sputtering, has been explored for the synthesis of catalysts. Correlations between spectroscopic data XPS and LEIS on model systems determine the recovery rate and the structure of the active phase : Mo low content monomeric and high content polymeric entities. Finally, the catalytic performances of the different catalytic systems for the controlled oxidation of methanol are discussed under spectroscopic characterizations. This work has been performed within INTERREG IV CATARR network (Materia Nova, Mons University and Lille1 University)
Jarrige, Ignace. "Caractérisation à l'échelle nanométrique d'interfaces métal/SiOxNy." Paris 6, 2003. http://www.theses.fr/2003PA066444.
Full textElbast, Mouhamad. "Cartographie cinétique des radioisotopes de l'iode dans le follicule thyroïdien du rat nouveau-né carencé en iode ou non : analyse par spectrométrie de masse d'ions secondaires (NanoSIMS50) : Contribution à l'étude des conséquences de Tchernobyl." Paris 7, 2008. http://www.theses.fr/2008PA077015.
Full textThe most signifîcant impact of the Chernobyl accident is the increased incidence of thyroid cancers among children living in contaminated areas. To estimate the radiation dose provided by radioiodine released after Chernobyl (iodine 131 and short-lived isotopes, iodine 132, 133, 134, 135), we used new-born rats to mimic the situation of fallout contamination (young age and iodine deficiency). The pups, under low iodine diet and under standard diet, were contaminated with 129I at ages varying between 2 to 15 days and sacrificed 1, 4, 8, 24 hours and 4, 8 days after contamination. The variation in intra colloidal iodine distribution from 1 hour to 8 days was performed using a new ionic nanoprobe (NanoSIMS50). This method permits to discriminate between the newly incorporated iodine (129) and the initial pool of iodine (127I). SIMS observations permit to initiate a microdosimetric study using a Monte Carlo simulation. Our results show a heterogeneous intra and interfollicular distribution of 129I. Iodine deficiency increases the absorbed amounts of iodine by a factor 10. Dosimetric estimates show an important contribution of short-lived radioiodine to the total thyrocyte dose. In conclusion, we have demonstrated that the age and the iodine deficiency accelerate the absorption of iodine in follicles and that the contribution of short-lived iodine connate be neglected
Bouillot, Claude. "Etude phénoménologique de la fissuration des aciers inoxydables austéno-ferritiques en milieu chlorure et sature en H2S. Apport de la spectroscopie de masse d'ions secondaires (SIMS) à l'analyse chimique de la distribution de l'hydrogène en fonction de la microstructure." Dijon, 1994. http://www.theses.fr/1994DIJOS075.
Full textDe, Luca Anthony. "Redistribution atomique de contaminants métalliques aux interfaces des structures des technologies CMOS." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4302/document.
Full textDuring this thesis work, we studied the atomic redistribution of metallic contaminantsin silicon and near a SiO2/Si interface. To conduct this study, we used three complementary characterisation techniques : transmission electron microscopy (TEM), atomic probe tomography (APT) and secondary ion mass spectrometry (SIMS).We first studied the diffusion and equilibrium segregation of various contaminants at a SiO2/Si interface, and more particularly, the diffusion of W and Mo. W exhibits a very slow diffusion kinetic.Physico-chemical characterizations performed by TEM and APT allowed discussing the concentrationprofiles obtained by SIMS leading to the diffusion model that we proposed. The study of Mo diffusionrevealed that this specy exhibits a low solubility limit in silicon and strongly interacts with irradiation-induced defects, leading to its precipitation.In a second phase, we studied the effect of a mobile interface, during a reaction, on the atomic redistribution of contaminants near this interface. We performed a comparative study of the behaviourof Fe and W during oxidation processes. W precipitates in the silicon substrate and is progressivelyrejected (snowplow) by the oxidation. Fe preferentially precipitates at the SiO2/Si interface. Theseprecipitates mask a part of the silicon substrate and thus hinder its oxidation, leading to the formation of characteristics pyramidal-shaped defects at the interface. Low temperature nickel germano-silicide formation have also been investigated. This reaction leads to the 3D snowplow of germanium atoms at the NiSiGe/SiGe interface
Frangieh, Georges. "Epitaxie et dopage du diamant de type n." Versailles-St Quentin en Yvelines, 2010. http://www.theses.fr/2010VERS0008.
Full textCe travail est une étude des différentes voies susceptibles de conduire à un dopage de type n du diamant CVD, qui est un verrou pour le développement d’une électronique bipolaire à base de diamant. La première étude a consisté à étudier l’influence du précurseur organique du donneur phosphore (tertiaributylphosphine, TBP), sur la morphologie des cristaux de diamant isolés réalisés par CVD assistée par plasma micro-onde sur substrat de silicium. Des couches polycristallines continues et dopées au phosphore ont été aussi réalisées sur silicium avec jusqu’à 1,6x1020 P/cm3 incorporés. Puis, la croissance dopée au phosphore sur substrat diamant monocristallin orienté (100) – préféré pour les applications électroniques - a été étudiée en contrôlant précisément l’angle de désorientation à 2,5°. Nous avons montré qu’un taux de carbone [C]/[H2] superieur à 1% conduit à une incorporation favorisée sous forme de donneur (jusqu’à 40%). Enfin, une première tentative de dopage arsenic a été menée en homoépitaxie sur du diamant orienté (111). D’après des calculs théoriques, ce dopant serait moins profond que le phosphore. Nous sommes parvenu à démontrer l’incorporation de l’As dans le diamant, en utilisant comme précurseur organique le triméthylarsenic, TMAs, Le taux de méthane (>0,25%) est un paramètre clef pour son l’incorporation, obtenue jusqu’à 8x1017 As/cm3. Le caractère donneur de l’arsenic dans le diamant reste encore à démontrer
Meyer, Raphaël. "The advanced developments of the Smart Cut™ technology : fabrication of silicon thin wafers & silicon-on-something hetero-structures." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI033/document.
Full textAt first, the thesis studies the kinetics of Smart Cut™ in silicon implanted with hydrogen ions for annealing temperature in the range 500°C-1300°C. The kinetics is characterized by using a specially-dedicated furnace and by considering laser annealing. Based on the related characterization and observations, a physical model is established based on the behavior of implanted hydrogen during annealing. The model is strengthened by SIMS characterization focused on the evolution of hydrogen during annealing and on numerical calculations. Additionally, the model proposes an explanation for the properties of the obtained films as a function of the annealing conditions, based on optical microscope and AFM observations and bonding energy characterization. Based on this splitting model, two innovative processes for fabrication of silicon films are proposed. The first process allows to produce films of silicon on sapphire and films of silicon on glass by considering a laser annealing. The second produces foils of monocrystalline silicon by liquid phase epitaxial growth on implanted silicon substrate. The study of the first process proves for the first time the possibility to apply the Smart Cut™ for substrates of implanted silicon. The resulting films present large surface of transferred films (up to 200 mm wafers), which is very interesting in an industrial perspective. The study proposes different characterization of the films obtained by this process (AFM, optical profilometry and 4 probe measurement). The second process is demonstrated by using a chamber of liquid phase epitaxial growth of silicon (deposition temperature superior to 1410°C) in order to deposit liquid silicon on implanted silicon substrates. The obtained films show a high degree of epitaxial growth (up to 90% of the film as characterized by EBSD) and show a thickness as low as 100µm. Additionally the detachment by Smart Cut of the deposited films is demonstrated
Nguyen, Duy Luan. "Catalyseurs à base d'or pour la réduction catalytique sélective des oxydes d'azote par les hydrocarbures provenant de sources mobiles." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10133/document.
Full textNowadays, emissions of atmospheric pollutants from mobile sources such as nitric oxides (NOx) are submitted to more stringent regulations especially within the next Euro 6 which will be implemented in Europe at the beginning of 2014. Up to now commercialized technologies available for the abatement of NOx from lean burn engine (running with a large excess of oxygen) are not capable to remove simultaneously NOx and particulates in lean atmosphere. This study is essentially focused on the NOx conversion to nitrogen via the Selective Catalytic Reduction by using hydrocarbons (HC-SCR) in representative Diesel exhaust gas conditions. This technology is more feasible than the Lean-NOx trap and Urea-SCR systems. Supported gold catalysts on alumina have been developped for the replacement of Pt and Pd less selective. Particular attention was paid to the thermal stability under reaction conditions at 500°C. Among the different synthesis protocols investigated (Deposition-precipitation, Anionic exchange), it was found that the anionic exchange method leads to the best compromise with a larger operating window after ageing. In addition, the reduction of NOx to nitrogen seems structure sensitive, the largest particles being more active than the smallest ones usually thermodynamically instable at high temperature. In this context, such behavior should be profitably used for further practical developments since post-combustion catalysts essentially run at rather high temperature. The second part of this study was dedicated to the modification of Au/Al2O3 catalysts after silver incorporation. Different strategies implemented for Ag incorporation have been examined. Coprecipitation and grafting lead to the formation of bimetallic particles with homogeneous distribution of gold and silver especially via the coprecipitation method. Strong interaction between Au and Ag with further modification of their electronic and adsorptive properties leads to strong deactivation. On the other hand, the segregation of both metals on alumina preserving their intrinsic properties improves the catalytic performances especially after ageing. The influence of different operating condition has been examined showing the best compromise when gold is successively impregnated on Ag/Al2O3
Terlier, Tanguy. "Analyse par ToF-SIMS de matériaux organiques pour les applications en électronique organique." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10165/document.
Full textDuring the last decade, organic electronics have developed rapidly. However, the production of organic electronic devices is still impeded because of various technological barriers. Such systems have specific analytical needs and time-of-flight secondary ion mass spectrometry (ToF-SIMS) is per se highly relevant, particularly when considering the use of a new type of ion source based on argon clusters (Arn +). The main objective of this work was therefore to understand the ion-matter interactions of such a cluster beam with the organic materials used in organic electronics. A fundamental study was carried out by comparing sputtering with three different ion beams (Cs+, C60 ++, Arn +) on organic structured samples (such as PS-b-PMMA block copolymers) and it transpired that although cluster size and energy has little effect on the observable damage to the sample, larger argon clusters induce more roughness during ToFSIMS depth profiling. This was confirmed by AFM (Atomic Force Microscopy) and XPS (Xray Photoelectron Spectroscopy) and a geometric model. Next, different devices in organic electronics were characterized by ToF-SIMS. The study of self-assembling PS-b-PMMA block copolymers made possible to evaluate the influence of the annealing duration and of the thickness of the layer. Furthermore, a protocol was developed to analyse stacks of inorganic/organic layers, in particular those contained in OLED devices. It was then possible to characterize the stacks of a complete organic light-emitting device whilst maintaining molecular signal and a high depth resolution of 2 nm. In parallel we identified the chemical degradation of an organic material in the stack and evaluated the efficiency of barrier layers designed to protect it. More precisely, specific signatures to the hydrolysis reaction of the layer as well as increase in moisture level after encapsulation were identified
Hu, Minhui. "Caractérisation physico-chimique et optique de miroirs multicouches pour le domaine EUV." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00641198.
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