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2. Preparation of atom probe tips from (nano)particles in dispersion using (di)electrophoresis and electroplating.

Author

Vorlaufer, Nora, Josten, Jan, Carl, Simon, Göbel, Erik, Søgaard, Alexander, Taccardi, Nicola, Spiecker, Erdmann, and Felfer, Peter

Abstract

The behavior of catalytic particles depends on their chemical structure and morphology. To reveal this information, the characterization with atom probe tomography has huge potential. Despite progresses and papers proposing various approaches towards the incorporation of particles inside atom probe tips, no single approach has been broadly applicable to date. In this paper, we introduce a workflow that allowed us to prepare atom probe specimens from Ga particles in suspension in the size range of 50 nm up to 2 μm. By combining dielectrophoresis and electrodeposition in a suitable way, we achieve a near‐tip shape geometry, without a time‐consuming FIB lift‐out. This workflow is a simple and quick method to prepare atom probe tips and allows for a high preparation throughput. Also, not using a lift‐out allowed us to use a cryo‐stage, avoiding melting of the Ga particles, while ensuring a mechanical stable atom probe tip. The specimen prepared by this workflow enable a stable measurement and low fracture rates. Research Highlights: Enabling cryo‐preparation of (nano)particles for the atom probe.Characterization of surface and bulk elemental distribution of GaPt model SCALMS. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Indhold

Author

Gøbel, Erik

Published
2024

13. Helsingør

Author

Gøbel, Erik

Published
2024

15. Forside

Author

Gøbel, Erik

Published
2024

16. The Danish Algerian Sea Passes, 1747-1838: An Example of Extraterritorial Production of Human Security

Author

Göbel, Erik

Subjects
19. Jahrhundert, 18. Jahrhundert, Denmark, Friedensvertrag, security, peace treaty, Afrika, Algerien, human security, Schifffahrt, Entwicklungsland, Nordafrika, bilateral relations, menschliche Sicherheit, French-speaking Africa, shipping, Mediterranean region, arabische Länder, frankophones Afrika, bilaterale Beziehungen, eighteenth century, developing country, Dänemark, Arab countries, North Africa, Sicherheit, Mittelmeerraum, Algeria, Africa, nineteenth century, contract, Vertrag
Abstract

This paper discusses the Danish 'Algerian sea passes', 1747-1838, as an example of production of 'Human Security'. Since the seventeenth century, privateers from the Barbary States (i.e. Morocco, Algiers, Tunisia, and Tripoli) had seized ships under the Danish flag and captured the sailors. Often they were ransomed, in the beginning by family members and from 1715 by the Slave Fund in Copenhagen. Beginning in 1746, however, Denmark signed peace treaties with the Barbary States. Thereafter Danish shipmasters would carry so-called Algerian sea passes which secured safe passage. The system worked well until after 1830 when the privateering business stopped. The Danish authorities issued 28,000 Algerian sea passes which produced specifically 'Human Security' for hundreds of thousands of Danish sailors. Insights into this system may challenge our notion of the so-called 'Westphalian System'., Historical Social Research Vol. 35, No. 4 (2010): Special Issue: The Production of Human Security in Premodern and Contemporary History. Starting Point and Frequency: Year: 1979, Issues per volume: 4, Volumes per year: 1

Published
2010
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