Bibliografías temáticas / In-situ TEM

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Literatura académica sobre el tema "In-situ TEM"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 20 de febrero de 2023

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Artículos de revistas sobre el tema "In-situ TEM"

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Huang, Jianyu, Liqiang Zhang y Yongfu Tang. "In Situ TEM Nano Electrochemistry". Microscopy and Microanalysis 27, S1 (30 de julio de 2021): 2720–22. http://dx.doi.org/10.1017/s1431927621009582.

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Warren, Oden L., Zhiwei Shan, S. A. Syed Asif, Eric A. Stach, J. W. Morris y Andrew M. Minor. "In situ nanoindentation in the TEM". Materials Today 10, n.º 4 (abril de 2007): 59–60. http://dx.doi.org/10.1016/s1369-7021(07)70051-2.

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Canavan, Megan, Dermot Daly, Andreas Rummel, Eoin K. McCarthy, Cathal McAuley y Valeria Nicolosi. "Novel in-situ lamella fabrication technique for in-situ TEM". Ultramicroscopy 190 (julio de 2018): 21–29. http://dx.doi.org/10.1016/j.ultramic.2018.03.024.

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Huang, Jianyu. "(Invited) In Situ TEM Nano Electrochemistry". ECS Meeting Abstracts MA2021-02, n.º 2 (19 de octubre de 2021): 225. http://dx.doi.org/10.1149/ma2021-022225mtgabs.

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Shahbazian-Yassar, Reza. "In Situ TEM for Rechargeable Batteries". Microscopy and Microanalysis 22, S3 (julio de 2016): 758–59. http://dx.doi.org/10.1017/s1431927616004645.

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Gibson, J. Murray, F. M. Ross y R. D. Twesten. "In situ TEM of silicon oxidation". Proceedings, annual meeting, Electron Microscopy Society of America 50, n.º 1 (agosto de 1992): 324–25. http://dx.doi.org/10.1017/s0424820100122022.

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Oxidation is an important process in materials science. Silicon oxidation is particularly relevant for electronic device fabrication, but it also provides a model system. We report here the use of in-situ TEM for the examination of the microstructural details of the oxidation process.
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Nagpal, P., I. Baker y J. A. Horton. "TEM in-situ straining of NiAl". Intermetallics 2, n.º 1 (enero de 1994): 23–29. http://dx.doi.org/10.1016/0966-9795(94)90047-7.

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Carlton, C. E. y P. J. Ferreira. "In situ TEM nanoindentation of nanoparticles". Micron 43, n.º 11 (noviembre de 2012): 1134–39. http://dx.doi.org/10.1016/j.micron.2012.03.002.

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Dillon, S. J. y Y. Liu. "In-Situ TEM in Complex Environments: Photocatalysis". Microscopy and Microanalysis 18, S2 (julio de 2012): 1072–73. http://dx.doi.org/10.1017/s1431927612007210.

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Allen, F. I., E. Kim, S. G. Ryu, B. Ozdol, C. P. Grigoropoulos y A. M. Minor. "In-situ Raman Spectroscopy in a TEM". Microscopy and Microanalysis 19, S2 (agosto de 2013): 394–95. http://dx.doi.org/10.1017/s1431927613003966.

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Tesis sobre el tema "In-situ TEM"

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Hummelgård, Magnus. "In-situ TEM Probing of Nanomaterials". Doctoral thesis, Mittuniversitetet, Institutionen för naturvetenskap, teknik och matematik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-8998.

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Nanomaterials because of their small size, may have special properties unlikely to be seen in ordinary types of materials. Nanomaterials like nanotubes,nanowires and nanoparticles are best studied at the nanoscale, vital but also problematic. In this thesis we use a transmission electron microscope (TEM)combined with a scanning tunneling microscope probe. This system allows TEM images to be captured and recorded into a movie together with recordedelectrical data for real time analysis. Using this method we found that the electrical conductivity of molybdenumbased nanowires Mo6S3I6 can be improved by current induced transformation. This might be a general method of improving nanowires which is of high valueif the wires are to be used in electrical circuits or field emission devices. The bending modulus for these nanowires were also determined, by an electromechanical resonance method, to 4.9 GPa. The sintering phase of silver nanoparticles, used in electrical conductive ink for printing electrical circuits, were studied by the in-situ TEM probing method. We observed that percolation path ways are formed and that the dispersive agent of the particles can be pyrolysed into a net of carbon with characteristics similar to graphite. We also developed a method for decorating nanowires and nanotubes with gold nanoparticles. Nanowire particle composites are often used in assembling more complex devices (electronic circuits) or for linking to organic molecules (biosensor applications) and existing particle decoration methods are either difficult or with low yield. By in situ TEM probing we found that carbon nanocages can be grown onto these gold nanoparticles. The size of the gold nanoparticles is controllable an thus the size of the nanocages. These nanocages may be used in medicine- or hydrogen storage-applications.
Nanomaterial har givits stort intresse under det senaste årtiondet, detta på grund av deras unika egenskaper som gör att de i många hänseenden överträffar traditionella material. Egenskaperna beror till största del på storlek och därför är det nödvändigt att studera dessa material på nanonivå, något som är problematiskt. För sådana studier krävs ett instrument med tillräckligt hög upplösning på nanonivå samt ett system med en prob som möjligör selektion och karakterisering utav individuella byggstenar. I denna avhandling används ett transmissionselektronmikroskop (TEM) tillsammans med ett sveptunnelmikroskop (STM) där det senare används som prob. Systemet medger studier på nanonivå och karakterisering av enskilda byggstenar under realtids avbildning (in situ). Metoden medger en bättre överblick och hanterbarhet vid nanomanipulering än vad till exempel atomkraftmikroskopi medger. Piezodrivna probar kan även användas i svepelektronmikroskop men dessa medger inte samma upplösning som transmissionselektronmikroskopet. Nanotrådar av Mo6S3I6 är ett alternativt material till kolnanorör och överträffar dessa i form av löslighet i båda organiska såväl som polära lösningsmedel. De är enkla att syntetisera men deras elektriska konduktivitet är låg. Mo6S3I6 nanotrådar studerades med in situ TEM probing. Vi fann att genom att driva en tillräckligt hög elektrisk ström genom nanotråden så resulterade detta i en omvandling till en solid metallisk molybden nanotråd med en konduktivitet nära värdet för bulkmaterialet. Resultat är intressant då nanotrådar kan användas i t.ex. fältemission, men resultatet visar också på att det kan vara en generell metod för att förbättra nanotrådar överlag. På dessa nanotrådar har även en elektromekanisk resonans studie utförts där böjmodulen för materialet bestämdes till 4.9 GPa. Med in situ-TEM-probing metoden har även silvernanobläck studerats under en sintringsprocess. Studien visade att vid sintringen så bildas perkulativa vägar genom bläckets silvernanopartiklar samt att vid hög sinteringstemperatur förkolnades det lösningsmedel som silvernanopartiklarna är lösta i. Förkolningen av lösningsmedlet resulterade i ett kolnät med liknande egenskaper som för grafit. Förståelse utav sinteringsprocessen är nödvändig eftersom vid tryckning av elektriskt ledande banor på papper används sintring för att höja ledningsförmågan. Genom att växa nanopartiklar på nanotrådar förändras deras egenskaper och tillämpningar. Existerande metoder är endera komplicerade eller ger dåligt ut- byte. Ett enkelt recept för att växa guldnanopartiklar på kolnanorör och Mo6S3I6 nanotrådar har därför tagits fram. Dessa kolnanorör och nanotrådar har sedan studerats med in-situ-TEM-probing metoden som visade att utanpå dessa guldnanopartiklar kan burar av kol skapas. Eftersom partiklarnas storlek kan kontrolleras kan även kolnanoburarnas storlek kontrolleras. Burarna har användningsområden t.ex. inom medicin och vid lagring av vätgas.
The thesis covers six scientific papers
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Hajduček, Jan. "Zobrazování metamagnetických tenkých vrstev pomocí TEM". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443233.

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Komplexní magnetické materiály v nanoměřítku mají své nezastupitelné místo v moderních zařízeních, jako jsou digitální paměti nebo senzory. Moderní technologické procesy vyžadují porozumění a možnost kontroly moderních magnetických materiálů až na atomární úrovni. Jednou z možných cest je magnetická analýza za použití transmisní elektronové mikroskopie (TEM), která je unikátní díky možnosti zobrazování až v subatomárním měřítku. Tato práce popisuje možnosti zobrazování metamagnetických materiálů metodou TEM. Tyto materiály se vyznačují možností stabilizace více magnetických uspořádání najednou za daných vnějších podmínek. Modelovým systémem pro popis zobrazovacích možností metody TEM byly zvoleny tenké vrstvy metamagnetické slitiny FeRh. Tento materiál prochází při zahřívání fázovou přeměnou z antiferomagnetické do feromagnetické fáze. Podrobně jsou rozebrány procesy výroby vzorků, což je zásadní pro úspěšnou TEM analýzu. Pro magnetické zobrazování vzorků v TEMu je využita technika diferenciálního fázového kontrastu (DPC), umožňující přímé mapování rozložení magnetické indukce ve vzorku. Důsledně je diskutován vznik signálu v DPC, což je nezbytné pro porozumění a analýzu výsledných dat. FeRh vrstvy jsou podrobeny analýze struktury, chemického složení a především magnetických vlastností obou magnetických fází. Závěrem je představen proces přímého ohřevu metamagnetických vrstev v TEMu.
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Jia, Xiaoting. "In-situ TEM study of carbon nanomaterials and thermoelectric nanomaterials". Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/69666.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2011.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 103-112).
Graphene nanoribbons (GNRs) are quasi one dimensional structures which have unique transport properties, and have a potential to open a bandgap at small ribbon widths. They have been extensively studied in recent years due to their high potential for future electronic and spintronic device applications. The edge structures - including the edge roughness and chirality - dramatically affect the transport, electronic, and magnetic properties of GNRs, and are of the critical importance. We have developed an efficient way of modifying the edges structures, to produce atomically smooth zigzag and armchair edges by using insitu TEM with a controlled bias. This work provides us with many opportunities for both fundamental studies and for future applications. I also report the use of either furnace heating or Joule heating to pacify the exposed graphene edges by loop formation in the graphitic nanoribbons. The edge energy minimization process involves the formation of loops between adjacent graphene layers. An estimation of the temperature during in-situ Joule heating is also reported based on the melting and evaporation of Pt nanoparticles. In this thesis work, I have also investigated the morphological and electronic properties of GNRs grown by chemical vapor deposition. Our results suggest that the GNRs have a surprisingly high crystallinity and a clean surface. Both folded and open edges are observed in GNRs. Atomic resolution scanning tunneling microscopy (STM) images were obtained on the folded layer and the bottom layer of the GNR, which enables clear identification of the chirality for both layers. We have also studied the electronic properties of the GNRs using low temperature scanning tunneling spectroscopy (STS). Our findings suggest that edges states exist at GNR edges which are dependent on the chiral angles of the GNRs.
by Xiaoting Jia.
Ph.D.
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Issa, Inas. "In situ TEM nanocompression and mechanical analysis of ceramic nanoparticles". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI008/document.

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Dans cette étude, nous proposons d’utiliser la compression in situ dans le MET afin de caractériser les propriétés mécaniques de nanoparticules céramiques dont la taille caractéristique est de l’ordre de quelques dizaines de nanomètres. Nous appliquerons cette méthode à des nanocubes monocristallins de MgO, une céramique modèle dont la plasticité est bien connue dans le matériau massif. Les essais de nanocompression montrent que les nanocubes de MgO se déforment de façon homogène jusqu’à de grandes déformations (>50%) sans fissure apparente. L’analyse des résultats est assistée par des méthodes de corrélation d’images numériques et simulations de type dynamique moléculaire. Le mécanisme de déformation et l'effet de taille sur la limite élastique sont identifiés. Dans une deuxième partie de la thèse, nous présentons une étude sur des nanoparticules d’alumine de transition compactée en CED (Cellule à Enclumes en Diamant) à température ambiante, sous plusieurs pressions (5 GPa, 15 GPa et 20 GPa). Des lames minces préparées par FIB ont été étudiées en MET. Des images HRTEM montrent une texture cristallographique qui devient plus importante à des pressions plus élevées. Une orientation cristallographique préférentielle est observée, avec les plans {220} de la phase gamma de l’alumine la plupart du temps parallèles à la surface de contact avec une particule voisine. Ce comportement mécanique est cohérent avec un système de glissement, connu pour les structures spinelles. Une corrélation de ce comportement avec les tests in situ MET réalisés sur des nanoparticules similaires, par Emilie Calvié lors de sa thèse, est présentée. Enfin, des clichés de diffraction de type Debye Scherrer sont réalisés sur ces lames minces de nanoparticules d’alumine de transition compactées en CED à différentes pressions. L’analyse quantitative de ces clichés montre une transformation de phase de ces nanoparticules d’alumine de phase gamma en phase delta, de manière croissante avec la pression
In this study, we propose an innovative mechanical observation protocol of ceramics nanoparticles in the 100nm size range. This Protocol consists of in situ TEM nanocompression tests of isolated nanoparticles. Load–real displacements curves, obtained by Digital Image Correlation, are analyzed and these analyses are correlated with Molecular Dynamics simulations. By this protocol a constitutive law with its mechanical parameters (Young modulus, Yield stress...) of the studied material at the nano-scale can be obtained. In situ TEM nano-compression tests on magnesium oxide nanocubes are performed. Magnesium oxide is a model material and its plasticity is very well known at bulk. The MgO nanocubes show large plastic deformation, more than 50% of plastic strain without any fracture. The TEM results are correlated to MD simulations and the deformation mechanism can be identified.The size effect and the electron beam effect on the yield strength are investigated. In a second part of the dissertation, we present a study on transition alumina nanoparticles compacted in a Diamond Anvil Cell at different uniaxial pressures. Thin Foils of these compacted nanoparticles are prepared by FIB for HRTEM Observations. Their analysis reveals the plastic deformation of the nanoparticles. The crystallographic texture observed inthese compacted nanoparticles in DAC shows a preferred orientation of the {110} lattice planes, orientated perpendicular to the compression direction. This is compatible with the slip system. This argument was reinforced with a preferred orientation of slip bands observed during in situ TEM nano-compression tests. Moreover, electron diffraction patterns (Debye Scherrer) analysis on these compacted transition alumina nanoparticles reveals the decrease of the presence of gamma-alumina and the increase of delta-alumina with increasing pressure. This reveals the phase transformation with increasing pressure from gamma to delta* alumina
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Vineis, Christopher J. (Christopher Joseph) 1974. "Characterization of OMVPE-grown GaSb-based epilayers using in situ reflectance and ex situ TEM". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8452.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2001.
Includes bibliographical references (leaves 227-238).
The focus of this thesis was to investigate and characterize GaSb, GaInAsSb, and AlGaAsSb epilayers grown by organometallic vapor phase epitaxy (OMVPE). These epilayers were principally characterized using in situ spectral reflectance and ex situ transmission electron microscopy (TEM). An in situ spectral (380-1100 nm) reflectance monitoring system was designed and fitted to the OMVPE reactor. It was determined that longer wavelengths are more useful for quantitative growth rate analysis, while shorter wavelengths are more sensitive to the GaSb substrate oxide desorption process. It was also determined that the GaInAsSb and AlGaAsSb alloy compositions could be determined accurately using in situ reflectance ratios. Use of the in situ reflectance monitor to efficiently perform necessary reactor/growth calibrations was also demonstrated. Analytic functions were used to model the refractive indices of GaSb, AlGaAsSb, and GaInAsSb. Specifically, Adachi's Model Dielectric Function [1, 2] was curve-fit to data for GaSb between 400 and 1000 nm, and fourth-order polynomials were fit to data for GaSb and GaInAsSb between 1 and 3 gnm. A linear interpolation of binary functions was used to generate a refractive index model for AlGaAsSb between 1 and 3 m as a function of Al fraction. These models were helpful in interpreting in situ reflectance data, and also in designing distributed Bragg reflectors. Phase separation in GaInAsSb was studied using TEM. A wide range of microstructures was observed, from nearly homogeneous to strongly phase separated.
(cont.) It was seen that in phase separated samples, the composition modulations typically created and coupled to morphological perturbations in the surface. One interesting manifestation of the phase separation was the spontaneous formation of a natural superlattice (period typically 10-30 nm) throughout the epilayer. This superlattice had two variants: one parallel to the growth surface, and one tilted with respect to the growth surface. It was discovered that the tilted superlattice was coupled to surface to relieve surface strain associated with the superlattice ...
by Christopher J. Vineis.
Ph.D.
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Qu, Weiguo. "In-situ TEM investigation of the phase transitions in perovskite ferroelectrics". [Ames, Iowa : Iowa State University], 2008.

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Wang, Lizhuo. "Nano Catalyst Design and Application in Sustainable Chemistry". Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29570.

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Heterogenous catalytic process is a complex art of surface, the surface properties, especially the properties of active sites such as geometric structure and chemical environment would drastically influence the reaction performance. Traditionally, most studies for catalyst surface properties rely on the ex situ characterisation which examines catalysts out of reaction condition. However, considering most of the heterogenous catalytic reactions are carried out under a harsh condition, i.e. elevated temperatures and pressures, the surface dynamic change over catalyst under reaction condition is generally not negligible and dominating the reaction performance. Thus, for understanding the real catalyst surface behaviour, we must observe the catalyst during reaction condition. Three different catalytic systems were selected in this research and the combined in situ microscopy and spectroscopy techniques, including in situ TEM, in situ EELS spectroscopy and in situ DRIFTS spectroscopy, were implemented to investigate the catalyst behaviour during the reactions. The first reaction is the oxidative methane coupling reaction over Li/MgO. Then followed by the oxidative methane coupling over La/MgO and ammonia synthesis over Ru/MgO. The in situ TEM provides the information of surface geometric change while the in situ EELS and DRIFTS give the chemical information of catalyst surface as well as adsorbed intermediates. Combined with ex situ characterisation results, the more comprehensive pictures for the mechanism of the investigated reactions can be depicted. The outcome of this thesis bridged the gap between surface geometric-chemical change over catalysts active sites and the reaction performance over heterogenous catalyst, which might even be the guidance for heterogenous catalyst development in the similar systems.
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Chang, Huai-Ning. "Electrostatic Feedback for Mems Sensor : Development of in situ TEM instrumentation". Thesis, Linköping University, The Department of Physics, Chemistry and Biology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11649.

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This thesis work is about further developing an existing capacitive MEMS sensor for in situ TEM nanoindentation developed by Nanofactory Instrument AB. Today, this sensor uses a parallel plate capacitor suspended by springs to measure the applied force. The forces are in the micro Newton range. One major issue using with this measurement technique is that the tip mounted on one of the sensor plates can move out of the TEM image when a force is applied. In order to improve the measurement technique electrostatic feedback has been investigated. The sensor’s electrostatic properties have been evaluated using Capacitance-Voltage measurements and a white light interferometer has been used to directly measure the displacement of the sensor with varying voltage. Investigation of the sensor is described with analytical models with detailed treatment of the capacitive response as function of electrostatic actuation. The model has been tested and refined by using experimental data. The model showed the existence of a serial capacitor in the sensor. Moreover, a feedback loop was tested, by using small beads as load and by manually adjusting the voltage. With the success of controlling the feedback loop manually, it is shown that the idea is feasible, but some modifications and improvements are needed to perform it more smoothly.

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Boniface, Maxime. "Suivi à l'échelle nanométrique de l'évolution d'une électrode de silicium dans un accumulateur Li-ion par STEM-EELS". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY051/document.

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L’accroissement des performances des accumulateurs Li-ion sur les 25 dernières années découle principalement de l’optimisation de leurs composants inactifs. Aujourd’hui, l’urgence environnementale impose de développer de nouveaux matériaux actifs d’électrode pour proposer la prochaine génération d’accumulateur qui participera à la transition énergétique. A cet effet, le silicium pourrait avantageusement remplacer le graphite des électrodes négatives à moyen terme. Cependant la rétention de capacité des électrodes de silicium est mise à mal par l’expansion volumique que le matériau subit lors sa réaction d’alliage avec le lithium, qui mène à la déconnexion des particules de Si et à une réduction continue de l’électrolyte. Une compréhension de ces phénomènes de vieillissement à l’échelle de la nanoparticule est nécessaire à la conception d’électrodes de silicium viables. Pour ce faire, la technique STEM-EELS a été optimisée de manière à s’affranchir des problèmes d’irradiation qui empêchent l’analyse des matériaux légers d’électrode négative et de la Solid electrolyte interface (SEI), grâce à l’analyse des pertes faibles EELS. Un puissant outil de cartographie de phase est obtenu et utilisé pour mettre en lumière la lithiation cœur-coquille initiale des nanoparticules de silicium cristallin, la morphologie hétérogène et la composition de la SEI, ainsi que la dégradation du silicium à l’issue de cyclages prolongés. Enfin, un modèle de vieillissement original est proposé, en s’appuyant notamment sur un effort de quantification des mesures STEM-EELS sur un grand nombre de nanoparticules
Over the last 25 years, the performance increase of lithium-ion batteries has been largely driven by the optimization of inactive components. With today’s environmental concerns, the pressure for more cost-effective and energy-dense batteries is enormous and new active materials should be developed to meet those challenges. Silicon’s great theoretical capacity makes it a promising candidate to replace graphite in negative electrodes in the mid-term. So far, Si-based electrodes have however suffered from the colossal volume changes silicon undergoes through its alloying reaction with Li. Si particles will be disconnected from the electrode’s percolating network and the solid electrolyte interface (SEI) continuously grows, causing poor capacity retention. A thorough understanding of both these phenomena, down to the scale of a single silicon nanoparticle (SiNP), is critical to the rational engineering of efficient Si-based electrodes. To this effect, we have developed STEM-EELS into a powerful and versatile toolbox for the study of sensitive materials and heterogeneous systems. Using the low-loss part of the EEL spectrum allows us to overcome the classical limitations of the technique.This is put to use to elucidate the first lithiation mechanism of crystalline SiNPs, revealing Li1.5Si @ Si core-shells which greatly differs from that of microparticles, and propose a comprehensive model to explain this size effect. The implications of that model regarding the stress that develops in the crystalline core of SiNPs are then challenged via stress measurements at the particle scale (nanobeam precession electron diffraction) for the first time, and reveal enormous compressions in excess of 4±2 GPa. Regarding the SEI, the phase-mapping capabilities of STEM-EELS are leveraged to outline the morphology of inorganic and organic components. We show that the latter contracts during electrode discharge in what is referred to as SEI breathing. As electrodes age, disconnection causes a diminishing number of SiNPs to bear the full capacity of the electrode. Overlithiated particles will in turn suffer from larger volumes changes and cause further disconnection in a self-reinforcing detrimental effect. Under extreme conditions, we show that SiNPs even spontaneously turn into a network of thin silicon filaments. Thus an increased active surface will compound the reduction of the electrolyte and the accumulation of the SEI. This can be quantified by summing and averaging STEM-EELS data on 1104 particles. In half-cells, the SEI volume is shown to increase 4-fold after 100 cycles without significant changes in its composition, whereas in full cells the limited lithiation performance understandably leads to a mere 2-fold growth. In addition, as the operating potential of the silicon electrodes increases in full cells – potential slippage – organic products in the SEI switch from being carbonate-rich to oligomer-rich. Finally, we regroup these findings into an extensive aging model of our own, based on both local STEM-EELS analyses and the macro-scale gradients we derived from them as a whole
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Berthier, Rémy. "Development of characterization methods for in situ annealing and biasing of semiconductor devices in the TEM". Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY014/document.

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Dans cette thèse, nous abordons les défis rencontrés lors de la caractérisation des mémoires non volatiles par microscopie en transmission in situ. Les innovations récentes menées sur les porte-objets de TEM in situ basés sur l'utilisation de puces en silicium apportent de grands avantages comparée aux précédents modèles. Cependant, cette technique reste complexe et les expériences de MET in situ sont difficiles à mener à terme. Ce manuscrit tente d'apporter de nouvelles solutions pour permettre l'observation à l'échelle atomique pendant le recuit, ou la polarisation d'un échantillon dans le MET. Ce projet a été mené à travers plusieurs améliorations effectuées au cours des différentes étapes des expériences de MET in situ. Cette thèse se focalise plus particulièrement sur les problèmes rencontrés lors de la polarisation de dispositifs de mémoires résistives de taille nanométrique. Ces travaux furent conduits à travers une étude des instruments utilisés, le développement de nouvelles méthodes de préparation d'échantillons, et une analyse de l'impact de l'imagerie électronique sur le fonctionnement d'un dispositif dans le MET.Tout d’abord, une nouvelle méthode est développée spécifiquement pour les expériences de MET in situ en température. Grâce à ces développements, la cristallisation de mémoires à changement de phase en GeTe est observée en temps réel. Ces résultats ont notamment permis d'obtenir des informations utiles pour le développement de mémoires à changement de phase de type chalcogénure. Ensuite, de nouvelles puces en silicium dédiées à la polarisation in situ sont développées et produites. Une étude est ensuite menée sur la préparation d'échantillons par FIB afin d'améliorer la qualité des contacts électriques pour la polarisation in situ, ainsi que la technique de préparation elle-même. La qualité de cette méthode est ensuite démontrée à travers des mesures quantitatives obtenues pendant la polarisation in situ d'un échantillon de référence de type jonction PN. Ces développements sont ensuite appliqués afin d’observer des dispositifs de mémoires résistives de type CBRAM en fonctionnement dans le microscope électronique en transmission. Ces résultats ont permis d'apporter de nouvelles informations sur les mécanismes de fonctionnement des mémoires résistives, ainsi que sur la technique de polarisation in situ
In this work, we address the current challenges encountered during in situ Transmission Electron Microscopy characterization of emerging non volatile data storage technologies. Recent innovation on in situ TEM holders based on silicon micro chips have led to great improvements compared to previous technologies. Still, in situ is a particularly complicated technique and experiments are extremely difficult to implement. This work provides new solutions to perform live observations at the atomic scale during both heating and biasing of a specimen inside the TEM. This was made possible through several improvements performed at different stages of the in situ TEM experiments. The main focus of this PhD concerned the issues faced during in situ biasing of a nanometer size resistive memory device. This was made possible through hardware investigation, sample preparation method developments, and in situ biasing TEM experiments.First, a new sample preparation method has been developed specifically to perform in situ heating experiments. Through this work, live crystallization of a GeTe phase change Memory Material is observed in the TEM. This allowed to obtain valuable information for the development of chalcogenide based Phase Change Resistive Memories. Then, new chips dedicated to in situ biasing experiments have been developed and manufactured. The FIB sample preparation is studied in order to improve electrical operation in the TEM. Quantitative TEM measurements are then performed on a reference PN junction to demonstrate the capabilities of this new in situ biasing experimental setup. By implementing these improvements performed on the TEM in situ biasing technique, results are obtained during live operation of a Conductive Bridge Resistive Memory device. This allowed to present new information on the resistive memories functioning mechanisms, as well as the in situ TEM characterization technique itself
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Libros sobre el tema "In-situ TEM"

1

Kaisha, Taisei Kensetsu Kabushiki. Heisei 24-nendo tei-kosuto, teifukagata dojō osen chōsa taisaku gijutsu kentō chōsa hōkokusho: Nanbunkaisei shian kagōbutsu ni taisuru gen'ichi jōka taisaku gijutsu. [Tōkyō-to Shinjuku-ku]: Taisei Kensetsu Kabushiki Kaisha, 2013.

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Kaisha, Taisei Kensetsu Kabushiki. Heisei 21-nendo tei-kosuto, tei fukagata dojō osen chōsa taisaku gijutsu kentō chōsa oyobi daiokishin-rui osen dojō jōka gijutsu tō kakuritsu chōsa hōkokusho: Kenki benzen bunkaikin DN11-kabu o mochiiru taisuisō no baioremediēshon. [Tōkyō-to Shinjuku-ku]: Taisei Kensetsu Kabushiki Kaisha, 2010.

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Hugo, Richard Charles. In-situ TEM observations of gallium penetration into aluminum grain boundaries. 1993.

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Hinks, J. A. y S. E. Donnelly. Proceedings of the First Workshop on the Use of in situ TEM / Ion Accelerator Techniques in the Study of Radiation Damage in Solids. Lulu Press, Inc., 2010.

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Structural characterization and gas reactions of small metal particles by high resolution in-situ TEM and TED: Periodic technical report ... for the period, January 1, 1986-December 31, 1986. [Washington, DC: National Aeronautics and Space Administration, 1987.

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United States. National Aeronautics and Space Administration, ed. Structural characterization and gas reactions of small metal particles by high-resolution, in-situ tem and ted: Semi-annual technical report for the period January 1, 1985 to June 30, 1985. Sunnyvale, CA: Eloret Institute, 1985.

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United States. National Aeronautics and Space Administration, ed. Structural characterization and gas reactions of small metal particles by high resolution in-situ TEM and TED: Semi-annual technical report for the period, July 1, 1985 - September 30, 1985, NSDS-grant NCC2-283. [Washington, DC: National Aeronautics and Space Administration, 1985.

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Mathiesen, Amber y Kali Roy. Prenatal Diagnosis. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190681098.003.0004.

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Prenatal diagnosis is the term used to describe a set of tests that are designed to determine whether a specific genetic condition is present in a fetus. This chapter provides a detailed description of procedures as well as the types of testing options available for prenatal diagnosis. The two techniques for prenatal diagnosis, amniocentesis and chorionic villus sampling, are described in detail, including their procedures, risks, limitations, and their use in twin gestations. The prenatal diagnosis testing options are also described in detail, including karyotype, fluorescence in situ hybridization (FISH), microarray, molecular testing, and alpha-fetoprotein (AFP) and acetylcholinesterase (AChE) level testing. The chapter also includes images of karyotype, FISH, and microarray test results, and it also reviews the indications for prenatal diagnostic testing.
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Donaldson, James y Richard Carrington. The complex primary total hip replacement. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199550647.003.007008.

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♦ Hip Dysplasia• Despite screening programs, a large number of patients are affected by dysplastic hips and their sequelae• An understanding of anatomical abnormalities is crucial• Appropriate techniques and implants make arthroplasty feasible• Complications are significantly higher than standard primary hip replacements♦ Protrusio Acetabuli• Technical difficulties include inadequate medial wall and restoring offset, hip centre and leg lengths• Neck may need to be cut in-situ; bone graft is usually necessary and ideally should be taken from the femoral head• Antiprotrusio cages or custom implants may be needed in cases with excessive bone loss♦ Arthrodesed hip to total hip replacement• Careful evaluation of the gluteal muscles is mandatory and predicts final walking ability and patient satisfaction• Long-term effectiveness of total hip replacement in ankylosed hips is satisfactory but there is a higher complication rate
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McCarthy, Michael. Museums and Maritime Archaeology. Editado por Ben Ford, Donny L. Hamilton y Alexis Catsambis. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780199336005.013.0045.

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This article reflects the role of universities, training institutes, foundations, and conservation laboratories in presenting an in situ underwater display case at an excavation, or a wreck, submerged structure, or dwelling. Therefore, the term “museum” includes both traditional museums as well as institutions that curate and display archaeological data. Museums represent one of the main outlets for maritime, underwater, and nautical archaeological materials. This article describes the early collection strategies of the archaeological data and explains how this concept came into being. Many prominent maritime archeologists were drawn in into universities, forming study collections. Some of these evolved into private museums. This article highlights threats to museums and maritime archaeology, such as lack of resources. There will be great excavations, recording, and raisings of relics, ships, and structures. The trend of bold new maritime archaeological museums is already visible in some countries, and will continue in the foreseeable future.
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Capítulos de libros sobre el tema "In-situ TEM"

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Chen, Bin, Jianming Cao y Dongping Zhong. "4D Ultrafast TEM". En In-Situ Transmission Electron Microscopy, 327–71. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6845-7_10.

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Wang, Peng, Feng Xu, Peng Gao, Songhua Cai y Xuedong Bai. "In-Situ Optical TEM". En In-Situ Transmission Electron Microscopy, 151–86. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6845-7_6.

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Zhong, Li, Lihua Wang, Jiangwei Wang, Yang He, Xiaodong Han, Zhiwei Shan y Xiuliang Ma. "In-Situ Nanomechanical TEM". En In-Situ Transmission Electron Microscopy, 53–82. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6845-7_3.

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Zheng, Shijian y Longbing He. "In-Situ Heating TEM". En In-Situ Transmission Electron Microscopy, 83–104. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6845-7_4.

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Che, Renchao, Yong Peng y He Tian. "Magnetism In-Situ TEM". En In-Situ Transmission Electron Microscopy, 187–219. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6845-7_7.

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Zhang, Liqiang, Yongfu Tang, Lin Gu y Jianyu Huang. "In-Situ Biasing TEM". En In-Situ Transmission Electron Microscopy, 105–49. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6845-7_5.

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Zhu, Chao, Wen Wang, Honggang Liao y Litao Sun. "In-Situ Liquid Cell TEM". En In-Situ Transmission Electron Microscopy, 221–50. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6845-7_8.

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Zhou, Guangwen y Judith C. Yang. "In-Situ TEM Studies of Oxidation". En In-Situ Electron Microscopy, 191–208. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527652167.ch8.

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Canepa, Silvia, Sardar Bilal Alam, Duc-The Ngo, Frances M. Ross y Kristian Mølhave. "In Situ TEM Electrical Measurements". En Controlled Atmosphere Transmission Electron Microscopy, 281–300. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22988-1_10.

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Kacher, Josh, Qian Yu, Claire Chisholm, Christoph Gammer y Andrew M. Minor. "In Situ TEM Nanomechanical Testing". En MEMS and Nanotechnology, Volume 5, 9–16. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22458-9_2.

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Actas de conferencias sobre el tema "In-situ TEM"

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Mases, Mattias. "Oxidizing nanocarbons: In situ TEM observations". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.789.

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Karki, Khim. "In-situ/operando bulk electrochemistry in TEM". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.1084.

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Takahashi, Yasuo y Masashi Arita. "In-situ TEM observation of ReRAM switching". En 2014 IEEE International Meeting for Future of Electron Devices, Kansai (IMFEDK). IEEE, 2014. http://dx.doi.org/10.1109/imfedk.2014.6867091.

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Lang, Eric, E. Homer, J. Bair, Michael Marshall, Henry Padilla, Brad Boyce, D. Frazer, P. Hosemann y Khalid Hattar. "In-situ TEM Cryoindentation of Nanocrystalline Copper ." En Proposed for presentation at the Microscopy and Microanalysis 2021 in ,. US DOE, 2021. http://dx.doi.org/10.2172/1888433.

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Karki, Khim. "In situ/operando Study of Photocatalysis in TEM". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.1088.

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Schryvers, Dominique. "A new deformation mechanism in Olivine? Ex-situ and in-situ TEM studies". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.673.

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Persson, Axel. "Time-resolved compositional mapping for in-situ TEM". En European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.256.

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Kim, M. J., S. Y. Park, D. K. Cha, J. Kim, H. C. Floresca, Ning Lu y J. G. Wang. "In-situ TEM characterization of nanomaterials and devices". En 2011 IEEE Nanotechnology Materials and Devices Conference (NMDC 2011). IEEE, 2011. http://dx.doi.org/10.1109/nmdc.2011.6155318.

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Clark-ex, Trevor, Ethan Scott, David Adams y Khalid Hattar. "In-situ TEM irradiation induced amorphization of Ge2Sb2Te5." En Proposed for presentation at the Microscopy and Microanalysis 2021 held August 2-4, 2021 in Virtual, US. US DOE, 2021. http://dx.doi.org/10.2172/1889055.

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Liao, C. N., K. C. Chen, W. W. Wu, L. J. Chen, K. N. Tu, Paul S. Ho, Ehrenfried Zschech y Shinichi Ogawa. "In-situ TEM Study of Electromigration in Cu lines". En STRESS-INDUCED PHENOMENA IN METALLIZATION: Tenth International Workshop on Stress-Induced Phenomena in Metallization. AIP, 2009. http://dx.doi.org/10.1063/1.3169252.

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Informes sobre el tema "In-situ TEM"

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Pan, Xiaoqing. Structure and Dynamics of Domains in Ferroelectric Nanostructures. In-situ TEM Studies. Office of Scientific and Technical Information (OSTI), junio de 2015. http://dx.doi.org/10.2172/1187994.

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Hinks, Jonathan, Graham Greaves y Robert Harrison. TEM with in situ Ion Irradiation of Nuclear Materials under In-Service Conditions. University of Huddersfield, 2016. http://dx.doi.org/10.5920/2016.epm0111351.

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Hsiung, L. In-Situ TEM Observations of Strain-Induced Interface Instability in TiAl/Ti3Al Laminate Composite. Office of Scientific and Technical Information (OSTI), abril de 2003. http://dx.doi.org/10.2172/15007359.

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Edmondson, Philip D. Report on the Installation and Preparedness of a Protochips Fusion in-situ Heating Holder for TEM. Office of Scientific and Technical Information (OSTI), marzo de 2017. http://dx.doi.org/10.2172/1356939.

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Mallamaci, M. P., C. B. Carter y J. Bentley. In-situ TEM crystallization of anorthite-glass films on {alpha}-Al{sub 2}O{sub 3}. Office of Scientific and Technical Information (OSTI), diciembre de 1993. http://dx.doi.org/10.2172/10120380.

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Dillon, Shen J. Final Report: In-Situ TEM Observations of Degradation Mechanisms in Next-Generation High-Energy Density Lithium-Ion Battery Systems. Office of Scientific and Technical Information (OSTI), noviembre de 2017. http://dx.doi.org/10.2172/1406527.

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ADAMS, CARLSON y BROCKMAN. LONG TERM IN SITU DISPOSAL ENGINEERING STUDY. Office of Scientific and Technical Information (OSTI), julio de 2003. http://dx.doi.org/10.2172/814774.

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James S. Durham, Stephen W.S. McKeever y Mark S. Akselrod. IN-SITU, LONG-TERM MONITORING SYSTEM FOR RADIOACTIVE CONTAMINANTS. Office of Scientific and Technical Information (OSTI), octubre de 2002. http://dx.doi.org/10.2172/811439.

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James S. Durham, Stephen W.S. McKeever y Mark S. Akselrod. IN-SITU, LONG-TERM MONITORING SYSTEM FOR RADIOACTIVE CONTAMINANTS. Office of Scientific and Technical Information (OSTI), octubre de 2002. http://dx.doi.org/10.2172/820568.

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Mulet, Sandrine. Synthesis of satellite validation results. EuroSea, 2022. http://dx.doi.org/10.3289/eurosea_d4.5.

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