Ab Initio Structure Determination of Cu2- xTe Plasmonic Nanocrystals by Precession-Assisted Electron Diffraction Tomography and HAADF-STEM Imaging
Mugnaioli, Enrico (Istituto Italiano di Tecnologia)
Gemmi, Mauro (Istituto Italiano di Tecnologia)
Tu, Renyong (Tsinghua University. Department of Chemistry)
David, Jérémy (Institut Català de Nanociència i Nanotecnologia)
Bertoni, Giovanni (Institute of Materials for Electronics and Magnetism)
Gaspari, Roberto (Istituto Italiano di Tecnologia)
De Trizio, Luca (Istituto Italiano di Tecnologia)
Manna, Liberato (Istituto Italiano di Tecnologia)

Date:	2018
Abstract:	We investigated pseudo-cubic CuTe nanosheets using electron diffraction tomography and high-resolution HAADF-STEM imaging. The structure of this metastable nanomaterial, which has a strong localized surface plasmon resonance in the near-infrared region, was determined ab initio by 3D electron diffraction data recorded in low-dose nanobeam precession mode, using a new generation background-free single-electron detector. The presence of two different, crystallographically defined modulations creates a 3D connected vacancy channel system, which may account for the strong plasmonic response of this material. Moreover, a pervasive rotational twinning is observed for nanosheets as thin as 40 nm, resulting in a tetragonal pseudo-symmetry.
Grants:	European Commission 614897
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Electron diffraction ; Scanning transmission electron microscopy ; Crystal structure ; Physical and chemical processes ; Defects in solids
Published in:	Inorganic chemistry, Vol. 57, Issue 16 (August 2018) , p. 10241-10248, ISSN 1520-510X

DOI: 10.1021/acs.inorgchem.8b01445

Preprint 23 p, 1.3 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles