Development of an Energy-Sensitive Detector for the Atom Probe Tomography

Bacchi, Christian; Costa, G. Da; Cadel, E.; Cuvilly, Fabien; Houard, Jonathan; Vaudolon, Charly; Normand, Antoine; Vurpillot, F.

doi:10.1017/s1431927621012708

Cited by 8 publications

(4 citation statements)

References 68 publications

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“…When a multiple evaporation event yields impacts very close in time and in space, a significant fraction of them can be lost because the second impact would fall within the so-called “dead region” of detection (which we will discuss later). However, it should be mentioned that in the LaWATAP, the electronic interface also records the amplitude signal collected from the MCP within the data filea piece of information usually completely neglected in APT data analysis . As we will more thoroughly discuss later and in a further, dedicated work, the amplitude generated by two neighboring impacts is larger than that generated by a single impact.…”

Section: Resultsmentioning

confidence: 99%

“…However, it should be mentioned that in the LaWATAP, the electronic interface also records the amplitude signal collected from the MCP within the data file�a piece of information usually completely neglected in APT data analysis. 61 As we will more thoroughly discuss later and in a further, dedicated work, the amplitude generated by two neighboring impacts is larger than that generated by a single impact.…”

Section: +mentioning

confidence: 92%

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Surface Dynamics of Field Evaporation in Silicon Carbide

et al. 2023

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Silicon carbide (SiC) may be considered as a model system for the study of field ion evaporation of carbides, which must be understood to perform accurate analyses of these systems by atom probe tomography (APT). As for other wide-bandgap semiconductors, the measurement of the composition of SiC by APT presents biases depending on the experimental parameters. Unlike silicon, carbon is characterized by a complex surface behavior, including the formation of molecules and the tendency to produce correlated evaporation. Furthermore, the spatial precision of three-dimensional (3D) reconstructions is strongly degraded in the direction parallel to the specimen surface, which points out to a strong roughening or dynamic degradation of the surface. This is confirmed by field ion microscopy (FIM) analysis, which reveals that atoms may move on the specimen surface under the influence of the high electric field. This complex surface behavior eventually translates into hidden detection events and, therefore, to errors in the measurement of composition.

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Section: Resultsmentioning

confidence: 99%

Section: +mentioning

confidence: 92%

Surface Dynamics of Field Evaporation in Silicon Carbide

et al. 2023

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“…Currently, it is still impossible to resolve all overlaps, especially of single and double-charged ions at the same mass-to-charge state ratio, for example, C 3 2+ and H 2 O + at the position at 18 u. There are efforts are underway though, to develop a kinetic energy-sensitive detector which could overcome such problems in the future 60 . But there are also some cases of overlap between different species, which have the same charge state.…”

Section: Resultsmentioning

confidence: 99%

Nanoscale analysis of frozen honey by atom probe tomography

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Solodenko

et al. 2022

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Three-dimensional reconstruction of the analysed volume is one of the main goals of atom probe tomography (APT) and can deliver nearly atomic resolution (~ 0.2 nm spatial resolution) and chemical information with a mass sensitivity down to the ppm range. Extending this technique to frozen biological systems would have an enormous impact on the structural analysis of biomolecules. In previous works, we have shown that it is possible to measure frozen liquids with APT. In this paper, we demonstrate the ability of APT to trace nanoscale precipitation in frozen natural honey. While the mass signals of the common sugar fragments CxHy and CxOyHz overlap with (H2O)nH from water, we achieved correct stoichiometric values via different interpretation approaches for the peaks and thus determined the water content reliably. Next, we use honey to investigate the spatial resolution capabilities as a step toward the measurement of biological molecules in solution in 3D with sub-nanometer resolution. This may take analytical techniques to a new level, since methods of chemical characterization for cryogenic samples, especially biological samples, are still limited.

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“…A proof of concept energy-position-sensitive detector has also recently been developed. 63 The incorporation of energy sensitivity to APT studies would facilitate the differentiation of overlapping peaks, 64 such as 40 Ar ++ and 20 Ca + , enabling the calculation of more accurate isotopic ratios.…”

Section: Addressing Analysis Challenges Through New Technology Develo...mentioning

confidence: 99%

Atom probe tomography and correlative microscopy: Key techniques for future planetary science studies

et al. 2022

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Our Galaxy is vast and awe-inspiring. The stars, planets, and our sun capture our imagination as children. For many of us, that wonder never ceases. It continues to inspire us throughout our careers and prompts us to question the evolution of our Solar System, to question what our place is within it, and how we may maintain longevity in a relatively volatile environment. To answer these questions planetary scientists turn to the study of extraterrestrial material. They analyze meteorites, impact craters, and materials returned by sample return missions for the evidence of events that are known to induce crystallographic and/or elemental changes, or for evidence of extraterrestrial isotopic abundances that point to the age and the original source of the material. Through these studies, we can constrain timelines of events that have occurred throughout the Solar System’s extensive history. Recently, atom probe tomography (APT) has been applied to the study of these materials. APT in correlation with larger-scale analysis techniques has provided insights into isotopic ratios or nanoscale distribution of elements, enriching our knowledge, and minimizing uncertainties in the time frame of critical cosmic events. The continued use of correlative microscopy with APT for the study of planetary science, including studies of small amounts of pristine materials delivered to the Earth by exciting sample return missions, promises to provide key information into the history of our Solar System. Here, we highlight the implications of correlative microscopy with APT for the future pursuits of planetary science, we reflect on the groundbreaking research already achieved, the challenges that have been overcome to achieve these outcomes and the challenges yet to come. Graphical abstract

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Development of an Energy-Sensitive Detector for the Atom Probe Tomography

Cited by 8 publications

References 68 publications

Surface Dynamics of Field Evaporation in Silicon Carbide

Surface Dynamics of Field Evaporation in Silicon Carbide

Nanoscale analysis of frozen honey by atom probe tomography

Atom probe tomography and correlative microscopy: Key techniques for future planetary science studies

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