X-ray studies of nanoporous gold : powder diffraction by large crystals with small holes
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| Název: | X-ray studies of nanoporous gold : powder diffraction by large crystals with small holes |
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| Autoři: | Graf, Matthias, Ngo, Dinh Bao Nam, Weissmüller, Jörg, Markmann, Jürgen |
| Informace o vydavateli: | American Physical Society 2019-02-06T09:53:19Z 2019-02-06T09:53:19Z 2017-12-19 |
| Druh dokumentu: | Electronic Resource |
| Abstrakt: | X-ray diffraction studies of nanoporous gold face the poorly understood diffraction scenario where large coherent crystals are riddled with nanoscale holes. Theoretical considerations derived in this study show that the ligament size of the porous network influences the scattering despite being quasi single crystalline. Virtual diffraction of artificially generated samples confirms the results but also shows a loss of long-range coherency and the appearance of microstrain due to thermal relaxation. Subsequently, a large set of laboratory X-ray investigations of nanoporous gold fabricated by different approaches and synthesis parameters reveal a clear correlation between ligament size and size of the coherent scattering domains as well as extremely high microstrains in samples with ligament sizes below 10 nm. Deutsche Forschungsgemeinschaft (DFG) |
| Témata: | porous crystals, diffraction pattern simulation, 530: Physik, 530, Journal Article, Other, Other, Other |
| URL: | Physical review materials 2475-9953 FOR 2213: Teilprojekt "Gefügeentwicklung und Auswirkungen der Mechanik auf die Katalyse" |
| Dostupnost: | Open access content. Open access content CC BY 4.0 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0 4.0 false |
| Poznámka: | application/pdf English |
| Other Numbers: | H9H oai:tore.tuhh.de:11420/2005 Physical Review Materials 1: (7) 076003 (2017) urn:nbn:de:gbv:830-882.026270 10.15480/882.2002 11420/2005 2-s2.0-85056303923 1152886895 |
| Přispívající zdroj: | TECHNISCHE UNIVERSITAT HAMBURG-HARBURG From OAIster®, provided by the OCLC Cooperative. |
| Přístupové číslo: | edsoai.on1152886895 |
| Databáze: | OAIster |
Nájsť tento článok vo Web of Science | Abstrakt: | X-ray diffraction studies of nanoporous gold face the poorly understood diffraction scenario where large coherent crystals are riddled with nanoscale holes. Theoretical considerations derived in this study show that the ligament size of the porous network influences the scattering despite being quasi single crystalline. Virtual diffraction of artificially generated samples confirms the results but also shows a loss of long-range coherency and the appearance of microstrain due to thermal relaxation. Subsequently, a large set of laboratory X-ray investigations of nanoporous gold fabricated by different approaches and synthesis parameters reveal a clear correlation between ligament size and size of the coherent scattering domains as well as extremely high microstrains in samples with ligament sizes below 10 nm.<br />Deutsche Forschungsgemeinschaft (DFG) |
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