Journal Article

FZJ-2020-02831

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Favoring the Growth of High-Quality, Three-Dimensional Supercrystals of Nanocrystals

Marino, E. ; Keller, A. W. ; An, D. ; van Dongen, S. ; Kodger, T. E. ; MacArthur, K. E.FZJ* ; Heggen, M.FZJ* ; Kagan, C. R. ; Murray, C. B. ; Schall, P. (Corresponding author)

2020
Soc. Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/25513  doi:10.1021/acs.jpcc.0c02805

Abstract: A recently developed emulsion-templated assembly method promises the scalable, low-cost, and reproducible fabrication of hierarchical nanocrystal (NC) superstructures. These superstructures derive properties from the unique combination of choices of NC building blocks and superstructure morphology and therefore realize the concept of “artificial solids”. To control the final properties of these superstructures, it is essential to control the assembly conditions that yield distinct architectural morphologies. Here, we explore the phase-space of experimental parameters describing the emulsion-templated assembly including temperature, interfacial tension, and NC polydispersity and demonstrate which conditions lead to the growth of the most crystalline NC superstructures or supercrystals. By using a combination of electron microscopy and small-angle X-ray scattering, we show that slower assembly kinetics, softer interfaces, and lower NC polydispersity contribute to the formation of supercrystals with grain sizes up to 600 nm, while reversing these trends yields glassy solids. These results provide a clear path to the realization of higher-quality supercrystals, necessary to many applications.

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Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)

Appears in the scientific report 2020

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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