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Direct Separation of Short Range Order in Intermixed Nanocrystalline and Amorphous Phases

Frenkel, AI; Kolobov, AV; Robinson, I; Cross, JO; Maeda, Y; Bouldin, CE; (2002) Direct Separation of Short Range Order in Intermixed Nanocrystalline and Amorphous Phases. Physical Review Letters , 89 (28) , Article 285503. 10.1103/PhysRevLett.89.285503. Green open access

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Abstract

Diffraction anomalous fine-structure (DAFS) and extended x-ray absorption fine-structure (EXAFS) measurements were combined to determine short range order (SRO) about a single atomic type in a sample of mixed amorphous and nanocrystalline phases of germanium. EXAFS yields information about the SRO of all Ge atoms in the sample, while DAFS determines the SRO of only the ordered fraction. We determine that the first-shell distance distribution is bimodal; the nanocrystalline distance is the same as the bulk crystal, to within 0.01(2)   Å, but the mean amorphous Ge-Ge bond length is expanded by 0.076(19)   Å. This approach can be applied to many systems of mixed amorphous and nanocrystalline phases.

Type: Article
Title: Direct Separation of Short Range Order in Intermixed Nanocrystalline and Amorphous Phases
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.89.285503
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.89.285503
Language: English
Additional information: © 2002 The American Physical Society
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/40989
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