Exploiting GISAXS for the Study of a 3D Ordered Superlattice of Self-Assembled Colloidal Iron Oxide Nanocrystals

A three-dimensional (3D) ordered superlattice of colloidal iron oxide nanocrystals obtained by magnetic-field-assisted self-assembly has been studied by grazing incidence small-angle X-ray scattering (GISAXS). A new model to simulate and interpret GISAXS patterns is presented, which returns the stru...

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Veröffentlicht in:	Crystal growth & design 2012-11, Vol.12 (11), p.5505-5512
Hauptverfasser:	Altamura, Davide, Holý, Václav, Siliqi, Dritan, Lekshmi, Indira Chaitanya, Nobile, Concetta, Maruccio, Giuseppe, Cozzoli, P. Davide, Fan, Lixin, Gozzo, Fabia, Giannini, Cinzia
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Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Methods of nanofabrication Nanoscale materials and structures: fabrication and characterization Other topics in nanoscale materials and structures Physics Self-assembly Structure of solids and liquids crystallography Structure of specific crystalline solids X-ray diffraction and scattering X-ray scattering (including small-angle scattering)
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container_title	Crystal growth & design
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creator	Altamura, Davide Holý, Václav Siliqi, Dritan Lekshmi, Indira Chaitanya Nobile, Concetta Maruccio, Giuseppe Cozzoli, P. Davide Fan, Lixin Gozzo, Fabia Giannini, Cinzia
description	A three-dimensional (3D) ordered superlattice of colloidal iron oxide nanocrystals obtained by magnetic-field-assisted self-assembly has been studied by grazing incidence small-angle X-ray scattering (GISAXS). A new model to simulate and interpret GISAXS patterns is presented, which returns the structural and morphological details of 3D nanocrystal-built supercrystals. The model is applied to a sample with a suitable surface morphology, allowing the observation of “volume diffraction” even at extremely low grazing incidence angle. In this particular case, the average fcc-like stacking of the nanocrystals (building blocks), their spherical shape, and statistical information on their size distribution and positions within the superlattice have been safely deduced. The proposed model is expected to be amendable for the analysis of more complex structures and applicable to a large variety of nanocrystal-based assemblies.
doi_str_mv	10.1021/cg3010739
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subjects	Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Methods of nanofabrication Nanoscale materials and structures: fabrication and characterization Other topics in nanoscale materials and structures Physics Self-assembly Structure of solids and liquids crystallography Structure of specific crystalline solids X-ray diffraction and scattering X-ray scattering (including small-angle scattering)
title	Exploiting GISAXS for the Study of a 3D Ordered Superlattice of Self-Assembled Colloidal Iron Oxide Nanocrystals
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