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

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

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Abstract

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 ligands, 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. Our computer simulations show that crystallization at such a low volume fraction is only possible if attractive interactions between colloidal nanocrystals are taken into account in the model as well. 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 optoelectronic applications, such as color tunable biolabels, color tunable phosphors in LEDs, and miniaturized lasers.

Original languageEnglish
Pages (from-to)3675-3681
Number of pages7
JournalNano Letters
Volume18
Issue number6
DOIs
Publication statusPublished - 13 Jun 2018

Fingerprint

Plasma confinement
Crystallization
X ray scattering
Nanocrystals
nanocrystals
crystallization
scattering
Oils
oils
x rays
Volume fraction
Color
color
Beam plasma interactions
Oleic Acid
bears
Emulsions
Optoelectronic devices
Phosphors
phosphors

Keywords

  • Colloidal nanocrystals
  • in situ small-/wide-angle X-ray scattering
  • self-assembly
  • spherical confinement
  • supraparticles

Cite this

Montanarella, F., Geuchies, J. J., Dasgupta, T., Prins, P. T., Van Overbeek, C., Dattani, R., ... Vanmaekelbergh, D. (2018). Crystallization of nanocrystals in spherical confinement probed by in Situ X-ray scattering. Nano Letters, 18(6), 3675-3681. https://doi.org/10.1021/acs.nanolett.8b00809
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, Daniel. / Crystallization of nanocrystals in spherical confinement probed by in Situ X-ray scattering. In: Nano Letters. 2018 ; Vol. 18, No. 6. pp. 3675-3681.
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abstract = "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 ligands, 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. Our computer simulations show that crystallization at such a low volume fraction is only possible if attractive interactions between colloidal nanocrystals are taken into account in the model as well. 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 optoelectronic applications, such as color tunable biolabels, color tunable phosphors in LEDs, and miniaturized lasers.",
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Montanarella, F, Geuchies, JJ, Dasgupta, T, Prins, PT, Van Overbeek, C, Dattani, R, Baesjou, P, Dijkstra, M, Petukhov, AV, Van Blaaderen, A & Vanmaekelbergh, D 2018, 'Crystallization of nanocrystals in spherical confinement probed by in Situ X-ray scattering', Nano Letters, vol. 18, no. 6, pp. 3675-3681. https://doi.org/10.1021/acs.nanolett.8b00809

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, Daniel.

In: Nano Letters, Vol. 18, No. 6, 13.06.2018, p. 3675-3681.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Montanarella, Federico

AU - Geuchies, Jaco J.

AU - Dasgupta, Tonnishtha

AU - Prins, P. Tim

AU - Van Overbeek, Carlo

AU - Dattani, Rajeev

AU - Baesjou, Patrick

AU - Dijkstra, Marjolein

AU - Petukhov, Andrei V.

AU - Van Blaaderen, Alfons

AU - Vanmaekelbergh, Daniel

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N2 - 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 ligands, 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. Our computer simulations show that crystallization at such a low volume fraction is only possible if attractive interactions between colloidal nanocrystals are taken into account in the model as well. 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 optoelectronic applications, such as color tunable biolabels, color tunable phosphors in LEDs, and miniaturized lasers.

AB - 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 ligands, 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. Our computer simulations show that crystallization at such a low volume fraction is only possible if attractive interactions between colloidal nanocrystals are taken into account in the model as well. 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 optoelectronic applications, such as color tunable biolabels, color tunable phosphors in LEDs, and miniaturized lasers.

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DO - 10.1021/acs.nanolett.8b00809

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AN - SCOPUS:85047495371

VL - 18

SP - 3675

EP - 3681

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

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Montanarella F, Geuchies JJ, Dasgupta T, Prins PT, Van Overbeek C, Dattani R et al. Crystallization of nanocrystals in spherical confinement probed by in Situ X-ray scattering. Nano Letters. 2018 Jun 13;18(6):3675-3681. https://doi.org/10.1021/acs.nanolett.8b00809