Tomographic Reconstruction

Gault, Baptiste; Moody, Michael P.; Cairney, Julie M.; Ringer, Simon P.

doi:10.1007/978-1-4614-3436-8_7

Cited by 5 publications

(2 citation statements)

References 134 publications

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“…51,52 APT data were reconstructed using a standard shank angle reconstruction algorithm. 53,54 CL measurements were carried out using an Attolight CL-dedicated SEM microscope. The acceleration voltage was 5 kV, and the beam current was ≈3 nA.…”

Section: Methods/experimentalmentioning

confidence: 99%

“…The APT experiment was performed at low electric field conditions on the tip surface, as suggested by the charge-state-ratio Ga 2+ /Ga + ∼ 0.03, corresponding to a surface field of 230 MV/cm . This allows us to observe the best signal-to-noise ratio in the mass spectrum , and reduce the preferential loss of metallic species during tip evaporation. , APT data were reconstructed using a standard shank angle reconstruction algorithm. , …”

Section: Methods/experimentalmentioning

confidence: 99%

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Effect of Extended Defects on AlGaN Quantum Dots for Electron-Pumped Ultraviolet Emitters

Cañas,

Rochat,

Grenier

et al. 2024

ACS Nano

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We study the origin of bimodal emission in AlGaN/AlN QD superlattices displaying a high internal quantum efficiency (around 50%) in the 230−300 nm spectral range. The secondary emission at longer wavelengths is linked to the presence of cone-like domains with deformed QD layers, which originate at the first AlN buffer/superlattice interface and propagate vertically. The cones originate at a 30°-faceted shallow pit in the AlN, which appears to be associated with a threading dislocation that produces strong shear strain. The cone-like structures present Ga enrichment at the boundaring facets and larger QDs within the conic domain. The bimodality of the luminescence is attributed to the differing dot size and composition within the cones and at the faceted boundaries, which is confirmed by the correlation of microscopy results and Schrodinger−Poisson calculations.

show abstract

Section: Methods/experimentalmentioning

confidence: 99%

Section: Methods/experimentalmentioning

confidence: 99%

Effect of Extended Defects on AlGaN Quantum Dots for Electron-Pumped Ultraviolet Emitters

Cañas,

Rochat,

Grenier

et al. 2024

ACS Nano

View full text Add to dashboard Cite

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Laser‐induced reversion of precipitates in an Al‐Li alloy: Study on temperature rise in pulsed laser atom probe

Khushaim

Gemma

Al-Kassab

2016

Microscopy Res & Technique

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The influence of tuning the laser pulse energy during the analyses on the resulting microstructure in a specimen utilizing an ultra-fast laser assisted atom probe was demonstrated by a case study of a binary Al-Li alloy. The decomposition parameters, such as the size, number density, volume fraction, and composition of δ' precipitates, were carefully monitored after each analysis. A simple model was employed to estimate the corresponding specimen temperature for each value of the laser energy. The results indicated that the corresponding temperatures for the laser pulse energy in the range of 10 to 80 pJ are located inside the miscibility gap of the binary Al-Li phase diagram and fall into the metastable equilibrium field. In addition, the corresponding temperature for a laser pulse energy of 100 pJ was in fairly good agreement with reported range of δ' solvus temperature, suggesting a result of reversion upon heating due to laser pulsing. Microsc. Res. Tech. 79:727-737, 2016. © 2016 Wiley Periodicals, Inc.

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Advanced Characterization of Precipitation and Microstructure Heterogeneity in X70 Steel

Gaudet

et al. 2022

Metall Mater Trans A

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Tomographic Reconstruction

Cited by 5 publications

References 134 publications

Effect of Extended Defects on AlGaN Quantum Dots for Electron-Pumped Ultraviolet Emitters

Effect of Extended Defects on AlGaN Quantum Dots for Electron-Pumped Ultraviolet Emitters

Laser‐induced reversion of precipitates in an Al‐Li alloy: Study on temperature rise in pulsed laser atom probe

Advanced Characterization of Precipitation and Microstructure Heterogeneity in X70 Steel

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