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Issue 17, 2018
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Rapid nanoparticle self-assembly at elevated temperatures

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Abstract

We demonstrate that rapid nanoparticle self-assembly is possible in organic solvents if the temperature is above the melting point of the particles’ ligand shell. Flow experiments coupled to small-angle X-ray scattering reveal the agglomeration kinetics and agglomerate structures of alkylthiol-coated gold nanoparticles at different temperatures, interparticle potentials, and times. Our experiments allow to discriminate between the effects of long-range and short-range interactions on self-assembly: crystalline agglomerates formed for a wide range of potentials, but only at temperatures where the short-ranged mobility was sufficient. Rapid superlattice formation in less than 3 s was observed for strongly attractive potentials at high temperatures, implying an assembly rate that is sufficient for large-scale material synthesis. Strong attraction between the particles did not impede high-quality self-assembly when short-ranged mobility was provided by ligands above a specific temperature.

Graphical abstract: Rapid nanoparticle self-assembly at elevated temperatures

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Publication details

The article was received on 22 Jan 2018, accepted on 06 Apr 2018 and first published on 10 Apr 2018


Article type: Paper
DOI: 10.1039/C8NR00597D
Citation: Nanoscale, 2018,10, 8009-8013
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    Rapid nanoparticle self-assembly at elevated temperatures

    D. Gerstner and T. Kraus, Nanoscale, 2018, 10, 8009
    DOI: 10.1039/C8NR00597D

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