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  Coherent X-ray diffraction imaging meets ptychography to study core-shell-shell nanowires

Davtyan, A., Favre-Nicolin, V., Lewis, R. B., Kuepers, H., Geelhaar, L., Kriegner, D., et al. (2018). Coherent X-ray diffraction imaging meets ptychography to study core-shell-shell nanowires. MRS Advances, 3(39), 2317-2322. doi:10.1557/adv.2018.466.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-F76F-D Version Permalink: http://hdl.handle.net/21.11116/0000-0001-F773-7
Genre: Journal Article

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 Creators:
Davtyan, A.1, Author
Favre-Nicolin, V.1, Author
Lewis, R. B.1, Author
Kuepers, H.1, Author
Geelhaar, L.1, Author
Kriegner, D.2, Author              
Bahrami, D.1, Author
Al-Hassan, A.1, Author
Chahine, G.1, Author
Loffeld, O.1, Author
Pietsch, U.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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 Abstract: We report on the results of coherent X-ray diffraction imaging (CXDI) and ptychography measurements of two individual core-shell-shell GaAs/(In,Ga)As/GaAs nanowires (NWs) grown by molecular beam epitaxy (MBE) on patterned Si(111) substrate. CXDI at the axial GaAs 111 Bragg reflection was applied at different positions along the NW axis in order to characterize the NWs in terms of structural homogeneity along the radial directions. At each positon 3D reciprocal space maps have been recoded and inverted using phase retrieval algorithms. The CXDI were complemented by 2D ptychography measurements at GaAs 111 Bragg reflection probing the same NWs with respect to their structural homogeneity. Both methods provide structural homogeneity for NW1 and NW2 except at the bottom part of the NWs. In case of NW2 CXDI and ptychography show changes in the structure of the top part of the NW indicated by 60 rotation of the indicated three-fold rotational symmetry in the observed diffraction patterns and changes in the strain field reconstructed from ptychography.

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Language(s): eng - English
 Dates: 2018-08-012018-08-01
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000440819700004
DOI: 10.1557/adv.2018.466
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Title: MRS Advances
Source Genre: Journal
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Publ. Info: Materials Research Society
Pages: - Volume / Issue: 3 (39) Sequence Number: - Start / End Page: 2317 - 2322 Identifier: ISSN: 20598521
CoNE: /journals/resource/20598521