Atomic-scale characterization of germanium isotopic multilayers by atom probe tomography

2013 ◽  
Vol 113 (2) ◽  
pp. 026101 ◽  
Author(s):  
Y. Shimizu ◽  
H. Takamizawa ◽  
Y. Kawamura ◽  
M. Uematsu ◽  
T. Toyama ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Atomic Scale ◽  
Scale Characterization

Atomic scale characterization of buried InxGa1−xAs quantum dots using pulsed laser atom probe tomography

2008 ◽  
Vol 92 (23) ◽  
pp. 233115 ◽  
Author(s):  
M. Müller ◽  
A. Cerezo ◽  
G. D. W. Smith ◽  
L. Chang ◽  
S. S. A. Gerstl
Keyword(s):  
Quantum Dots ◽  
Atom Probe Tomography ◽  
Pulsed Laser ◽  
Atom Probe ◽  
Atomic Scale ◽  
Scale Characterization

scholarly journals Atomic-Scale Characterization of N-Doped Si Nanocrystals Embedded in SiO2 by Atom Probe Tomography

2019 ◽  
Vol 123 (12) ◽  
pp. 7381-7389 ◽  
Author(s):  
Rémi Demoulin ◽  
Manuel Roussel ◽  
Sébastien Duguay ◽  
Dominique Muller ◽  
Daniel Mathiot ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Atomic Scale ◽  
Si Nanocrystals ◽  
Scale Characterization

scholarly journals Hardware and Techniques for Cross- Correlative TEM and Atom Probe Analysis

2008 ◽  
Vol 16 (4) ◽  
pp. 42-47 ◽  
Author(s):  
Brian P. Gorman ◽  
David Diercks ◽  
Norman Salmon ◽  
Eric Stach ◽  
Gonzalo Amador ◽  
...  
Keyword(s):  
A Priori ◽  
Atom Probe ◽  
Atomic Scale ◽  
Original Position ◽  
3 Dimensional ◽  
Original Specimen ◽  
High Electrical Field ◽  
Scale Characterization ◽  
Surface Monolayers

Atom probe tomography has primarily been used for atomic scale characterization of high electrical conductivity materials. A high electrical field applied to needle-shaped specimens evaporates surface atoms, and a time of flight measurement determines each atom's identity. A 2-dimensional detector determines each atom's original position on the specimen. When repeated successively over many surface monolayers, the original specimen can be reconstructed into a 3-dimensional representation. In order to have an accurate 3-D reconstruction of the original, the field required for atomic evaporation must be known a-priori. For many metallic materials, this evaporation field is well characterized, and 3-D reconstructions can be achieved with reasonable accuracy.

Atomic-scale compositional characterization of a nanocrystalline AlCrCuFeNiZn high-entropy alloy using atom probe tomography

2013 ◽  
Vol 61 (12) ◽  
pp. 4696-4706 ◽  
Author(s):  
K.G. Pradeep ◽  
N. Wanderka ◽  
P. Choi ◽  
J. Banhart ◽  
B.S. Murty ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Atom Probe ◽  
Atomic Scale ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Compositional Characterization

scholarly journals Characterization of Ni-base Superalloys on the Atomic Scale by Atom Probe Tomography and Spherical-Aberration Corrected Analytical Electron Microscopy Techniques

2006 ◽  
Vol 12 (S02) ◽  
pp. 534-535 ◽  
Author(s):  
M Watanabe ◽  
D Saxey ◽  
R Zheng ◽  
D Williams ◽  
S Ringer
Keyword(s):  
Electron Microscopy ◽  
Atom Probe Tomography ◽  
Spherical Aberration ◽  
Analytical Electron Microscopy ◽  
Atom Probe ◽  
Atomic Scale ◽  
Analytical Electron ◽  
Microscopy Techniques ◽  
Aberration Corrected

Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2006

scholarly journals Visualizing the iron atom exchange front in the Fe(II)-catalyzed recrystallization of goethite by atom probe tomography

2019 ◽  
Vol 116 (8) ◽  
pp. 2866-2874 ◽  
Author(s):  
Sandra D. Taylor ◽  
Jia Liu ◽  
Xin Zhang ◽  
Bruce W. Arey ◽  
Libor Kovarik ◽  
...  
Keyword(s):  
Cross Sections ◽  
Atom Probe Tomography ◽  
Atom Probe ◽  
Atomic Scale ◽  
Isolation And Characterization ◽  
Successful Isolation ◽  
Redox Interaction ◽  
Spatial And Temporal Characteristics

The autocatalytic redox interaction between aqueous Fe(II) and Fe(III)-(oxyhydr)oxide minerals such as goethite and hematite leads to rapid recrystallization marked, in principle, by an atom exchange (AE) front, according to bulk iron isotopic tracer studies. However, direct evidence for this AE front has been elusive given the analytical challenges of mass-resolved imaging at the nanoscale on individual crystallites. We report successful isolation and characterization of the AE front in goethite microrods by 3D atom probe tomography (APT). The microrods were reacted with Fe(II) enriched in tracer 57Fe at conditions consistent with prior bulk studies. APT analyses and 3D reconstructions on cross-sections of the microrods reveal an AE front that is spatially heterogeneous, at times penetrating several nanometers into the lattice, in a manner consistent with defect-accelerated exchange. Evidence for exchange along microstructural domain boundaries was also found, suggesting another important link between exchange extent and initial defect content. The findings provide an unprecedented view into the spatial and temporal characteristics of Fe(II)-catalyzed recrystallization at the atomic scale, and substantiate speculation regarding the role of defects controlling the dynamics of electron transfer and AE interaction at this important redox interface.

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