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Crystallization of nanocrystals in spherical confinement probed by in-situ X-ray scattering

Montanarella, Federico ; Geuchies, Jaco J ; Dasgupta, Tonnishtha ; Prins, P. Tim ; Van Overbeek, Carlo ; Dattani, Rajeev ; Baesjou, Patrick ; Dijkstra, Marjolein ; Petukhov, Andrei V ; Van Blaaderen, Alfons ; Vanmaekelbergh, Daniël

2018

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Título:
Crystallization of nanocrystals in spherical confinement probed by in-situ X-ray scattering
Autor: Montanarella, Federico ; Geuchies, Jaco J ; Dasgupta, Tonnishtha ; Prins, P. Tim ; Van Overbeek, Carlo ; Dattani, Rajeev ; Baesjou, Patrick ; Dijkstra, Marjolein ; Petukhov, Andrei V ; Van Blaaderen, Alfons ; Vanmaekelbergh, Daniël
Assuntos: Bioengineering ; Colloidal nanocrystals ; Condensed Matter Physics ; General Chemistry ; General Materials Science ; in situ small-/wide-angle X-ray scattering ; Mechanical Engineering ; self-assembly ; spherical confinement ; supraparticles
Notas: Nano Letters 18(6), - (2018)
1530-6984
https://dspace.library.uu.nl/handle/1874/364975
Descrição: We studied the formation of supraparticles from nanocrystals confined in slowly evaporating oil droplets in an oil-in-water emulsion. The nanocrystals consist of an FeO core, a CoFe2O4 shell, and oleate capping, with an overall diameter of 12.5 nm. We performed in-situ Small- and Wide-Angle X-ray Scattering experiments during the entire period of solvent evaporation and colloidal crystallization. We observed a slow increase in the volume fraction of nanocrystals inside the oil droplets up to 20%, at which a sudden crystallization occurs. This indicates that attractions between the nanocrystals are important as a driving force for the assembly. The spherical supraparticles have a diameter of about 700 nm and consist of a few crystalline face-centered-cubic domains. Nanocrystal supraparticles bear importance for magnetic and opto-electronic applications, such as color tunable bio-labels, color-tunable phosphors in LEDS, and miniaturized lasers.
Data de criação/publicação: 2018
Idioma: Inglês

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Crystallization of nanocrystals in spherical confinement probed by in-situ X-ray scattering

Montanarella, Federico ; Geuchies, Jaco J ; Dasgupta, Tonnishtha ; Prins, P. Tim ; Van Overbeek, Carlo ; Dattani, Rajeev ; Baesjou, Patrick ; Dijkstra, Marjolein ; Petukhov, Andrei V ; Van Blaaderen, Alfons ; Vanmaekelbergh, Daniël

2018

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