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Hydrophilic Gold Supracrystals Differing by the Nanoparticle Crystalline Structure

Mourdikoudis, S; Colak, A; Arfaoui, I; Pileni, M-P; (2017) Hydrophilic Gold Supracrystals Differing by the Nanoparticle Crystalline Structure. The Journal of Physical Chemistry C , 121 (20) pp. 10670-10680. 10.1021/acs.jpcc.6b10151. Green open access

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Abstract

Very few studies concern water-soluble nanocrystals self-assembled in crystalline 3D superlattices called supracrystals. Furthermore, the control of the crystalline structure of nanocrystals known as nanocrystallinity has not been yet achieved with water-soluble nanocrystals. Here we produce, selectively, 5 nm Au single-domain (SD) and polycrystalline (POLY) water-soluble nanocrystals. These nanocrystals self-assembled in face-centered-cubic (fcc) supracrystals. The supracrystal stiffness evolves with the nanocrystallinity, the nanocrystal surface charge, as well as the steric effect of the coating agent. The optical properties of SD and POLY nanoparticles and those of the related supracrystals are also presented. In addition, a nanocrystallinity segregation event was observed upon drying-assisted self-assembly of aqueous stoichiometric mixtures of SD and POLY NCs, as in the case of their hydrophobic counterparts.

Type: Article
Title: Hydrophilic Gold Supracrystals Differing by the Nanoparticle Crystalline Structure
Event: 18th International Symposium on Small Particles and Inorganic Clusters (ISSPIC)
Location: Jyvaskyla, FINLAND
Dates: 14 August 2016 - 19 August 2016
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acs.jpcc.6b10151
Publisher version: http://dx.doi.org/10.1021/acs.jpcc.6b10151
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
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 > Dept of Physics and Astronomy
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10058117
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