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Artykuły w czasopismach na temat „Atom probe tomograpghy”

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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 20 lutego 2023

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1

Miller, M. K. "Atom Probe Tomography: A Tutorial". Microscopy and Microanalysis 6, S2 (sierpień 2000): 1188–89. http://dx.doi.org/10.1017/s1431927600038435.

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Atom probe tomography (APT) is an ultrahigh resolution microanalytical technique that enables the spatial coordinates and elemental identities of the atoms in a small volume of material to be determined. The specimen volume that may be analyzed is typically ∼ 10 to 20 nm square by ∼ 100 to 250 nm deep, and contains up to ∼ 1 million atoms. The distribution of the solute atoms within this volume may then be reconstructed from these data. The compositions of small volumes are determined by simply counting the number of atoms of each type within that volume, and thus the technique provides a fundamental measure of local concentrations. Atom probe tomography requires that the specimen has some electrical conductivity and may be applied to almost all metals and alloys, many semiconductors, and some electrically conducting ceramics. The sharp needle-shaped specimens may be fabricated from bulk and thin film materials with the use of electropolishing, chemical or ion milling methods.

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2

Chiaramonti, Ann N., Luis Miaja-Avila, Paul T. Blanchard, David R. Diercks, Brian P. Gorman i Norman A. Sanford. "A Three-Dimensional Atom Probe Microscope Incorporating a Wavelength-Tuneable Femtosecond-Pulsed Coherent Extreme Ultraviolet Light Source". MRS Advances 4, nr 44-45 (2019): 2367–75. http://dx.doi.org/10.1557/adv.2019.296.

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ABSTRACTPulsed coherent extreme ultraviolet (EUV) radiation is a potential alternative to pulsed near-ultraviolet (NUV) wavelengths for atom probe tomography. EUV radiation has the benefit of high absorption within the first few nm of the sample surface for elements across the entire periodic table. In addition, EUV radiation may also offer athermal field ion emission pathways through direct photoionization or core-hole Auger decay processes, which are not possible with the (much lower) photon energies used in conventional NUV laser-pulsed atom probe. We report preliminary results from what we believe to be the world’s first EUV radiation-pulsed atom probe microscope. The instrument consists of a femtosecond-pulsed, coherent EUV radiation source interfaced to a local electrode atom probe tomograph by means of a vacuum manifold beamline. EUV photon-assisted field ion emission (of substrate atoms) has been demonstrated on various insulating, semiconducting, and metallic specimens. Select examples are shown.

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3

Takahashi, Jun, Kazuto Kawakami i Yukiko Kobayashi. "Study on Quantitative Analysis of Carbon and Nitrogen in Stoichiometric θ-Fe3C and γ′-Fe4N by Atom Probe Tomography". Microscopy and Microanalysis 26, nr 2 (5.03.2020): 185–93. http://dx.doi.org/10.1017/s1431927620000045.

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AbstractThe quantitative analysis performance of carbon and nitrogen was investigated using stoichiometric θ-Fe3C (25 at% C) and γ′-Fe4N (~20 at% N) precipitates in pulsed voltage and pulsed laser atom probes. The dependencies of specimen temperature, pulse fraction, and laser pulse energy on the apparent concentrations of carbon and nitrogen were measured. Good coincidence with 25 at% carbon concentration in θ-Fe3C was obtained for the pulsed voltage atom probe by considering the mean number of carbon atoms per ion at 24 Da and the detection loss of iron, while better coincidence was obtained for the pulsed laser atom probe by considering only the mean number of carbon at 24 Da. On the other hand, a lack of nitrogen concentration in γ′-Fe4N was observed for the two atom probes. In particular, the pulsed laser atom probe showed a significant lack of nitrogen concentration. This implies that a large amount of 14N2+ was obscured by the main iron peak of 56Fe2+ at 28 Da in the mass-to-charge spectrum. Regarding preferential evaporation or retention, carbon in θ-Fe3C exhibited little of either, but nitrogen in γ′-Fe4N exhibited definite preferential retention. This result can be explained by the large difference in ionization energy between carbon and nitrogen.

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4

Miller, M. K. "Atom Probe Tomography Of Interfaces". Microscopy and Microanalysis 5, S2 (sierpień 1999): 118–19. http://dx.doi.org/10.1017/s143192760001391x.

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The technique of atom probe tomography (APT) enables the x, y, and z coordinates and the elemental identities of the atoms in a small volume to be determined at the atomic level. Therefore, the APT technique may be used to characterize solute segregation to interfaces and precipitation in terms of concentration gradients and precipitate morphology. This type of information may be used to optimize the design of alloys.The material that was used to illustrate the capabilities of atom probe tomography is a complex polycrystalline nickel-based superalloy, Alloy 718. The composition of this commercial superalloy is Ni- 3.2 at. % Nb, 0.96% Al, 1.15% Ti, 20.3% Fe, 21.8% Cr, 0.26% Co, 1.8% Mo, 0.16% Mn, 0.21% Si and 0.26% C. The material was characterized after a heat treatment oM h at 1038°C + 8 h at 870°C + 500 h at 600°C. Previous atom probe field ion microscopy characterizations of this material has demonstrated that there is no intragranular precipitation after the anneal at 1038°C.

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5

Felfer, P., L. T. Stephenson i T. Li. "Atom Probe Tomography". Practical Metallography 55, nr 8 (16.08.2018): 515–26. http://dx.doi.org/10.3139/147.110543.

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6

Kelly, Thomas F., i Michael K. Miller. "Atom probe tomography". Review of Scientific Instruments 78, nr 3 (marzec 2007): 031101. http://dx.doi.org/10.1063/1.2709758.

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7

Miller, M. K., i R. G. Forbes. "Atom probe tomography". Materials Characterization 60, nr 6 (czerwiec 2009): 461–69. http://dx.doi.org/10.1016/j.matchar.2009.02.007.

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8

Kim, Se-Ho, Ji Yeong Lee, Jae-Pyoung Ahn i Pyuck-Pa Choi. "Fabrication of Atom Probe Tomography Specimens from Nanoparticles Using a Fusible Bi–In–Sn Alloy as an Embedding Medium". Microscopy and Microanalysis 25, nr 2 (4.02.2019): 438–46. http://dx.doi.org/10.1017/s1431927618015556.

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AbstractWe propose a new method for preparing atom probe tomography specimens from nanoparticles using a fusible bismuth–indium–tin alloy as an embedding medium. Iron nanoparticles synthesized by the sodium borohydride reduction method were chosen as a model system. The as-synthesized iron nanoparticles were embedded within the fusible alloy using focused ion beam milling and ion-milled to needle-shaped atom probe specimens under cryogenic conditions. An atom probe analysis revealed boron atoms in a detected iron nanoparticle, indicating that boron from the sodium borohydride reductant was incorporated into the nanoparticle during its synthesis.

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9

Kelly, Thomas F., i David J. Larson. "Atom Probe Tomography 2012". Annual Review of Materials Research 42, nr 1 (4.08.2012): 1–31. http://dx.doi.org/10.1146/annurev-matsci-070511-155007.

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10

Cerezo, Alfred, Peter H. Clifton, Mark J. Galtrey, Colin J. Humphreys, Thomas F. Kelly, David J. Larson, Sergio Lozano-Perez i in. "Atom probe tomography today". Materials Today 10, nr 12 (grudzień 2007): 36–42. http://dx.doi.org/10.1016/s1369-7021(07)70306-1.

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11

Miller, Michael K. "Atom Probe Tomography and the Local Electrode Atom Probe". Microscopy and Microanalysis 10, S02 (sierpień 2004): 150–51. http://dx.doi.org/10.1017/s1431927604881157.

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12

Seidman, David N., i Krystyna Stiller. "An Atom-Probe Tomography Primer". MRS Bulletin 34, nr 10 (październik 2009): 717–24. http://dx.doi.org/10.1557/mrs2009.194.

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AbstractAtom-probe tomography (APT) is in the midst of a dynamic renaissance as a result of the development of well-engineered commercial instruments that are both robust and ergonomic and capable of collecting large data sets, hundreds of millions of atoms, in short time periods compared to their predecessor instruments. An APT setup involves a field-ion microscope coupled directly to a special time-of-flight (TOF) mass spectrometer that permits one to determine the mass-to-charge states of individual field-evaporated ions plus theirx-,y-, andz-coordinates in a specimen in direct space with subnanoscale resolution. The three-dimensional (3D) data sets acquired are analyzed using increasingly sophisticated software programs that utilize high-end workstations, which permit one to handle continuously increasing large data sets. APT has the unique ability to dissect a lattice, with subnanometer-scale spatial resolution, using either voltage or laser pulses, on an atom-by-atom and atomic plane-by-plane basis and to reconstruct it in 3D with the chemical identity of each detected atom identified by TOF mass spectrometry. Employing pico- or femtosecond laser pulses using visible (green or blue light) to ultraviolet light makes the analysis of metallic, semiconducting, ceramic, and organic materials practical to different degrees of success. The utilization of dual-beam focused ion-beam microscopy for the preparation of microtip specimens from multilayer and surface films, semiconductor devices, and for producing site-specific specimens greatly extends the capabilities of APT to a wider range of scientific and engineering problems than could previously be studied for a wide range of materials: metals, semiconductors, ceramics, biominerals, and organic materials.

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13

Geiser, Brian P., Thomas F. Kelly, David J. Larson, Jason Schneir i Jay P. Roberts. "Spatial Distribution Maps for Atom Probe Tomography". Microscopy and Microanalysis 13, nr 6 (14.11.2007): 437–47. http://dx.doi.org/10.1017/s1431927607070948.

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A real-space technique for finding structural information in atom probe tomographs, spatial distribution maps (SDM), is described. The mechanics of the technique are explained, and it is then applied to some test cases. Many applications of SDM in atom probe tomography are illustrated with examples including finding crystal lattices, correcting lattice strains in reconstructed images, quantifying trajectory aberrations, quantifying spatial resolution, quantifying chemical ordering, dark-field imaging, determining orientation relationships, extracting radial distribution functions, and measuring ion detection efficiency.

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14

Kasian, Olga, Simon Geiger, Tong Li, Jan-Philipp Grote, Kevin Schweinar, Siyuan Zhang, Christina Scheu i in. "Degradation of iridium oxides via oxygen evolution from the lattice: correlating atomic scale structure with reaction mechanisms". Energy & Environmental Science 12, nr 12 (2019): 3548–55. http://dx.doi.org/10.1039/c9ee01872g.

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Combination of atom probe tomography, isotope-labelling and online electrochemical mass spectrometry provides direct correlation of atomic scale structure of Ir oxide catalysts with the mechanism of oxygen formation from the lattice atoms.

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15

Han, Bin, Jie Wei, Feng He, Da Chen, Zhi Wang, Alice Hu, Wenzhong Zhou i Ji Kai. "Elemental Phase Partitioning in the γ-γ″ Ni2CoFeCrNb0.15 High Entropy Alloy". Entropy 20, nr 12 (28.11.2018): 910. http://dx.doi.org/10.3390/e20120910.

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The partitioning of the alloying elements into the γ″ nanoparticles in a Ni2CoFeCrNb0.15 high entropy alloy was studied by the combination of atom probe tomography and first-principles calculations. The atom probe tomography results show that the Co, Fe, and Cr atoms incorporated into the Ni3Nb-type γ″ nanoparticles but their partitioning behaviors are significantly different. The Co element is much easier to partition into the γ″ nanoparticles than Fe and Cr elements. The first-principles calculations demonstrated that the different partitioning behaviors of Co, Fe and Cr elements into the γ″ nanoparticles resulted from the differences of their specific chemical potentials and bonding states in the γ″ phase.

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16

van Vreeswijk, S. H., M. Monai, R. Oord, J. E. Schmidt, E. T. C. Vogt, J. D. Poplawsky i B. M. Weckhuysen. "Nano-scale insights regarding coke formation in zeolite SSZ-13 subject to the methanol-to-hydrocarbons reaction". Catalysis Science & Technology 12, nr 4 (2022): 1220–28. http://dx.doi.org/10.1039/d1cy01938d.

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A correlation between the micro- and nano-scale coking behavior of SSZ-13 was discovered with in situ/operando spectroscopy and atom probe tomography (APT), which allows for spatial reconstruction and analysis of relations between framework elements and carbon atoms.

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17

Larson, David, Dan Lenz, Isabelle Martin, Ty Prosa, David Reinhard, Peter Clifton, Brian Geiser, Robert Ulfig i Joe Bunton. "Directions in Atom Probe Tomography". Microscopy and Microanalysis 27, S1 (30.07.2021): 2464–66. http://dx.doi.org/10.1017/s1431927621008801.

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18

Blavette, Didier, i Sébastien Duguay. "Atom probe tomography in nanoelectronics". European Physical Journal Applied Physics 68, nr 1 (26.09.2014): 10101. http://dx.doi.org/10.1051/epjap/2014140060.

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19

Reinhard, D. A., T. R. Payne, E. M. Strennen, E. Oltman, B. P. Geiser, G. S. Sobering, D. R. Lenz i in. "Atom Probe Tomography Productivity Enhancements". Microscopy and Microanalysis 25, S2 (sierpień 2019): 522–23. http://dx.doi.org/10.1017/s1431927619003349.

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20

Gault, Baptiste, i David J. Larson. "Atom probe tomography: Looking forward". Scripta Materialia 148 (kwiecień 2018): 73–74. http://dx.doi.org/10.1016/j.scriptamat.2017.11.009.

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21

Parman, S. W., D. R. Diercks, B. P. Gorman i R. F. Cooper. "Atom probe tomography of isoferroplatinum". American Mineralogist 100, nr 4 (1.04.2015): 852–60. http://dx.doi.org/10.2138/am-2015-4998.

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22

Gnaser, Hubert. "Atom probe tomography of nanostructures". Surface and Interface Analysis 46, S1 (15.04.2014): 383–88. http://dx.doi.org/10.1002/sia.5507.

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23

Gault, Baptiste, Michael P. Moody, Frederic De Geuser, Alex La Fontaine, Leigh T. Stephenson, Daniel Haley i Simon P. Ringer. "Spatial Resolution in Atom Probe Tomography". Microscopy and Microanalysis 16, nr 1 (18.01.2010): 99–110. http://dx.doi.org/10.1017/s1431927609991267.

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AbstractThis article addresses gaps in definitions and a lack of standard measurement techniques to assess the spatial resolution in atom probe tomography. This resolution is known to be anisotropic, being better in-depth than laterally. Generally the presence of atomic planes in the tomographic reconstruction is considered as being a sufficient proof of the quality of the spatial resolution of the instrument. Based on advanced spatial distribution maps, an analysis methodology that interrogates the local neighborhood of the atoms within the tomographic reconstruction, it is shown how both the in-depth and the lateral resolution can be quantified. The influences of the crystallography and the temperature are investigated, and models are proposed to explain the observed results. We demonstrate that the absolute value of resolution is specimen specific.

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24

Arslan, I., EA Marquis, M. Homer, MA Hekmaty i NC Bartelt. "Correlating Electron Tomography and Atom Probe Tomography". Microscopy and Microanalysis 14, S2 (sierpień 2008): 1044–45. http://dx.doi.org/10.1017/s1431927608087746.

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25

Moody, Michael P., Baptiste Gault, Leigh T. Stephenson, Ross K. W. Marceau, Rebecca C. Powles, Anna V. Ceguerra, Andrew J. Breen i Simon P. Ringer. "Lattice Rectification in Atom Probe Tomography: Toward True Three-Dimensional Atomic Microscopy". Microscopy and Microanalysis 17, nr 2 (8.03.2011): 226–39. http://dx.doi.org/10.1017/s1431927610094535.

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AbstractAtom probe tomography (APT) represents a significant step toward atomic resolution microscopy, analytically imaging individual atoms with highly accurate, though imperfect, chemical identity and three-dimensional (3D) positional information. Here, a technique to retrieve crystallographic information from raw APT data and restore the lattice-specific atomic configuration of the original specimen is presented. This lattice rectification technique has been applied to a pure metal, W, and then to the analysis of a multicomponent Al alloy. Significantly, the atoms are located to their true lattice sites not by an averaging, but by triangulation of each particular atom detected in the 3D atom-by-atom reconstruction. Lattice rectification of raw APT reconstruction provides unprecedented detail as to the fundamental solute hierarchy of the solid solution. Atomic clustering has been recognized as important in affecting alloy behavior, such as for the Al-1.1Cu-1.7Mg (at. %) investigated here, which exhibits a remarkable rapid hardening reaction during the early stages of aging, linked to clustering of solutes. The technique has enabled lattice-site and species-specific radial distribution functions, nearest-neighbor analyses, and short-range order parameters, and we demonstrate a characterization of solute-clustering with unmatched sensitivity and precision.

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26

Rolland, Nicolas, François Vurpillot, Sébastien Duguay i Didier Blavette. "A Meshless Algorithm to Model Field Evaporation in Atom Probe Tomography". Microscopy and Microanalysis 21, nr 6 (9.11.2015): 1649–56. http://dx.doi.org/10.1017/s1431927615015184.

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AbstractAn alternative approach for simulating the field evaporation process in atom probe tomography is presented. The model uses the electrostatic Robin’s equation to directly calculate charge distribution over the tip apex conducting surface, without the need for a supporting mesh. The partial ionization state of the surface atoms is at the core of the method. Indeed, each surface atom is considered as a point charge, which is representative of its evaporation probability. The computational efficiency is ensured by an adapted version of the Barnes–Hut N-body problem algorithm. Standard desorption maps for cubic structures are presented in order to demonstrate the effectiveness of the method.

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27

Xiong, Xiangyuan, i Matthew Weyland. "Microstructural Characterization of an Al-Li-Mg-Cu Alloy by Correlative Electron Tomography and Atom Probe Tomography". Microscopy and Microanalysis 20, nr 4 (12.05.2014): 1022–28. http://dx.doi.org/10.1017/s1431927614000798.

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AbstractCorrelative electron tomography and atom probe tomography have been carried out successfully on the same region of a commercial 8090 aluminum alloy (Al-Li-Mg-Cu). The combination of the two techniques allows accurate geometric reconstruction of the atom probe tomography data verified by crystallographic information retrieved from the reconstruction. Quantitative analysis of the precipitate phase compositions and volume fractions of each phase have been obtained from the atom probe tomography and electron tomography at various scales, showing strong agreement between both techniques.

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28

Seidman, David N. "Perspective: From field-ion microscopy of single atoms to atom-probe tomography: A journey: “Atom-probe tomography” [Rev. Sci. Instrum. 78, 031101 (2007)]". Review of Scientific Instruments 78, nr 3 (marzec 2007): 030901. http://dx.doi.org/10.1063/1.2716503.

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La Fontaine, Alexandre, Sandra Piazolo, Patrick Trimby, Limei Yang i Julie M. Cairney. "Laser-Assisted Atom Probe Tomography of Deformed Minerals: A Zircon Case Study". Microscopy and Microanalysis 23, nr 2 (30.01.2017): 404–13. http://dx.doi.org/10.1017/s1431927616012745.

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AbstractThe application of atom probe tomography to the study of minerals is a rapidly growing area. Picosecond-pulsed, ultraviolet laser (UV-355 nm) assisted atom probe tomography has been used to analyze trace element mobility within dislocations and low-angle boundaries in plastically deformed specimens of the nonconductive mineral zircon (ZrSiO4), a key material to date the earth’s geological events. Here we discuss important experimental aspects inherent in the atom probe tomography investigation of this important mineral, providing insights into the challenges in atom probe tomography characterization of minerals as a whole. We studied the influence of atom probe tomography analysis parameters on features of the mass spectra, such as the thermal tail, as well as the overall data quality. Three zircon samples with different uranium and lead content were analyzed, and particular attention was paid to ion identification in the mass spectra and detection limits of the key trace elements, lead and uranium. We also discuss the correlative use of electron backscattered diffraction in a scanning electron microscope to map the deformation in the zircon grains, and the combined use of transmission Kikuchi diffraction and focused ion beam sample preparation to assist preparation of the final atom probe tip.

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30

Vorlaufer, Nora, Jan Josten, Chandra Macauley, Nemanja Martić, Andreas Hutzler, Nicola Taccardi, Karl Mayrhofer i Peter Felfer. "Atom Probe Tomography of Catalyst Nanoparticles". Microscopy and Microanalysis 28, S1 (22.07.2022): 742–43. http://dx.doi.org/10.1017/s1431927622003427.

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Hono, Kazuhiro, Dierk Raabe, Simon P. Ringer i David N. Seidman. "Atom probe tomography of metallic nanostructures". MRS Bulletin 41, nr 1 (styczeń 2016): 23–29. http://dx.doi.org/10.1557/mrs.2015.314.

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Kelly, Thomas F., David J. Larson, Keith Thompson, Roger L. Alvis, Joseph H. Bunton, Jesse D. Olson i Brian P. Gorman. "Atom Probe Tomography of Electronic Materials". Annual Review of Materials Research 37, nr 1 (sierpień 2007): 681–727. http://dx.doi.org/10.1146/annurev.matsci.37.052506.084239.

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Gault, Baptiste, Shyeh Tjing Loi, Vicente J. Araullo-Peters, Leigh T. Stephenson, Michael P. Moody, Sachin L. Shrestha, Ross K. W. Marceau, Lan Yao, Julie M. Cairney i Simon P. Ringer. "Dynamic reconstruction for atom probe tomography". Ultramicroscopy 111, nr 11 (listopad 2011): 1619–24. http://dx.doi.org/10.1016/j.ultramic.2011.08.005.

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Vurpillot, F., i C. Oberdorfer. "Modeling Atom Probe Tomography: A review". Ultramicroscopy 159 (grudzień 2015): 202–16. http://dx.doi.org/10.1016/j.ultramic.2014.12.013.

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Geiser, BP, DA Reinhard, JH Bunton, TR Payne, KP Rice, Y. Chen i DJ Larson. "Reconstruction Metrics in Atom Probe Tomography". Microscopy and Microanalysis 25, S2 (sierpień 2019): 336–37. http://dx.doi.org/10.1017/s1431927619002411.

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Miller, Michael K., Thomas F. Kelly, Krishna Rajan i Simon P. Ringer. "The future of atom probe tomography". Materials Today 15, nr 4 (kwiecień 2012): 158–65. http://dx.doi.org/10.1016/s1369-7021(12)70069-x.

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Larson, D. J., D. A. Reinhard, T. J. Prosa, D. Olson, D. Lawrence, P. H. Clifton, R. M. Ulfig i in. "New Applications in Atom Probe Tomography". Microscopy and Microanalysis 18, S2 (lipiec 2012): 926–27. http://dx.doi.org/10.1017/s1431927612006484.

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Larson, D. J., J. W. Valley, T. Ushikubo, M. K. Miller, H. Takamizawa, Y. Shimizu, L. M. Gordon i in. "New Applications in Atom Probe Tomography". Microscopy and Microanalysis 19, S2 (sierpień 2013): 1022–23. http://dx.doi.org/10.1017/s1431927613007101.

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Heck, Philipp R., Dieter Isheim, Michael J. Pellin, Andrew M. Davis, Anirudha V. Sumant, Orlando Auciello, Jeffrey W. Elam i in. "Atom-Probe Tomography of Meteoritic Nanodiamonds." Microscopy and Microanalysis 20, S3 (sierpień 2014): 1676–77. http://dx.doi.org/10.1017/s1431927614010113.

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Miller, M. K. "An Introduction to Atom Probe Tomography". Microscopy and Microanalysis 9, S02 (sierpień 2003): 1558–59. http://dx.doi.org/10.1017/s143192760344779x.

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41

Stiller, K., L. Viskari, G. Sundell, F. Liu, M. Thuvander, H. O. Andrén, D. J. Larson, T. Prosa i D. Reinhard. "Atom Probe Tomography of Oxide Scales". Oxidation of Metals 79, nr 3-4 (21.12.2012): 227–38. http://dx.doi.org/10.1007/s11085-012-9330-6.

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Rigutti, L., B. Bonef, J. Speck, F. Tang i R. A. Oliver. "Atom probe tomography of nitride semiconductors". Scripta Materialia 148 (kwiecień 2018): 75–81. http://dx.doi.org/10.1016/j.scriptamat.2016.12.034.

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Rice, Katherine, Yimeng Chen, Robert Ulfig i Tsuyoshi Onishi. "Fixturing Options for Atom Probe Tomography". Microscopy and Microanalysis 26, S2 (30.07.2020): 2710–11. http://dx.doi.org/10.1017/s1431927620022515.

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Mangelinck, D., F. Panciera, K. Hoummada, M. El Kousseifi, C. Perrin, M. Descoins i A. Portavoce. "Atom probe tomography for advanced metallization". Microelectronic Engineering 120 (maj 2014): 19–33. http://dx.doi.org/10.1016/j.mee.2013.12.018.

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Khan, Mansoor Ali, Simon P. Ringer i Rongkun Zheng. "Atom Probe Tomography on Semiconductor Devices". Advanced Materials Interfaces 3, nr 12 (6.04.2016): 1500713. http://dx.doi.org/10.1002/admi.201500713.

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Felfer, Peter J., Baptiste Gault, Gang Sha, Leigh Stephenson, Simon P. Ringer i Julie M. Cairney. "A New Approach to the Determination of Concentration Profiles in Atom Probe Tomography". Microscopy and Microanalysis 18, nr 2 (3.02.2012): 359–64. http://dx.doi.org/10.1017/s1431927611012530.

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AbstractAtom probe tomography (APT) provides three-dimensional analytical imaging of materials with near-atomic resolution using pulsed field evaporation. The processes of field evaporation can cause atoms to be placed at positions in the APT reconstruction that can deviate slightly from their original site in the material. Here, we describe and model one such process—that of preferential retention of solute atoms in multicomponent systems. Based on relative field evaporation probabilities, we calculate the point spread function for the solute atom distribution in the “z,” or in-depth direction, and use this to extract more accurate solute concentration profiles.

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Vurpillot, Francois, Constantinos Hatzoglou, Bertrand Radiguet, Gerald Da Costa, Fabien Delaroche i Frederic Danoix. "Enhancing Element Identification by Expectation–Maximization Method in Atom Probe Tomography". Microscopy and Microanalysis 25, nr 2 (28.02.2019): 367–77. http://dx.doi.org/10.1017/s1431927619000138.

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AbstractThis paper describes an alternative way to assign elemental identity to atoms collected by atom probe tomography (APT). This method is based on Bayesian assignation of label through the expectation–maximization method (well known in data analysis). Assuming the correct shape of mass over charge peaks in mass spectra, the probability of each atom to be labeled as a given element is determined, and is used to enhance data visualization and composition mapping in APT analyses. The method is particularly efficient for small count experiments with a low signal to noise ratio, and can be used on small subsets of analyzed volumes, and is complementary to single-ion decomposition methods. Based on the selected model and experimental examples, it is shown that the method enhances our ability to observe and extract information from the raw dataset. The experimental case of the superimposition of the Si peak and N peak in a steel is presented.

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Kelly, Thomas F., Keith Thompson, Emmanuelle A. Marquis i David J. Larson. "Atom Probe Tomography Defines Mainstream Microscopy at the Atomic Scale". Microscopy Today 14, nr 4 (lipiec 2006): 34–41. http://dx.doi.org/10.1017/s1551929500050264.

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When making a sculpture, it is the eyes that guide the hands and tools and perceive the outcome. In simple words, “in order to make, you must be able to see.” So too, when making a nanoelectronic device, it is the microscope (eyes) that guides the process equipment (hands and tools) and perceives the outcome. As we emerge into the century of nanotechnology, it is imperative that the eyes on the nanoworld provide an adequate ability to “see.” We have microscopies that resolve 0.02 nm on a surface (scanning tunneling microscope (STM)) or single atoms in a specimen (atom probe tomographs (APT) and transmission electron microscopes (TEM)).

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Schmitz, Guido, Constantin Ene, Ch Lang i Vitaliy Vovk. "Atom Probe Tomography: Studying Reactions on Top of the Tip". Advances in Science and Technology 46 (październik 2006): 126–35. http://dx.doi.org/10.4028/www.scientific.net/ast.46.126.

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Down-scaling is a major principle of modern technology. As a consequence, the stability of many technical devices is controlled by solid state reactions that proceed on the range of a few nanometres only. On such a short length scale even basic aspects of reaction physics as fundamental as e.g. the Ficks laws of diffusion, need to be reconsidered. Only very few dedicated techniques are suitable to study atomic transport and reactions with sufficient accuracy. Among them, the atom probe tomography is exceptional, as it allows the detection and localization of individual atoms with an accuracy of a lattice constant. An almost complete reconstruction of the 3D atomic arrangement of different atomic species gets possible. This article provides an overview on recent atom probe studies of reactive diffusion. After an introduction into the principles of the analysis method, physical mechanisms of solid state reactions are discussed in view of recent experiments at metallic thin film interfaces. How does nucleation of an interfacial product take place? In which way do grain boundaries influence the reaction? As a technical example, the stability of Cu/NiFe GMR sensor layers is discussed.

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Oberdorfer, C., T. Withrow, L. J. Yu, K. Fisher, E. A. Marquis i W. Windl. "Influence of surface relaxation on solute atoms positioning within atom probe tomography reconstructions". Materials Characterization 146 (grudzień 2018): 324–35. http://dx.doi.org/10.1016/j.matchar.2018.05.014.

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