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Issue 36, 2020
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Colloidal assembly in droplets: structures and optical properties

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Abstract

Colloidal assembly in emulsion drops provides fundamental tools for studying optimum particle arrangement under spherical confinement and practical means for producing photonic microparticles. Recent progress has revealed that energetically favored cluster configurations are different from conventional supraballs, which could enhance optical performance. This paper reviews state-of-the-art emulsion-templated colloidal clusters, and particularly focuses on recently reported novel structures such as icosahedral, decahedral, and single-crystalline face-centered cubic (fcc) clusters. We classify the clusters according to the number of component particles as small (N < O(102)), medium (O(102) ≤ NO(104)), and large (NO(105)). For each size of clusters, we discuss the detailed structures, mechanisms of cluster formation, and optical properties and potential applications. Finally, we outline current challenges and questions that require further investigation.

Graphical abstract: Colloidal assembly in droplets: structures and optical properties

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Article information


Submitted
18 Jun 2020
Accepted
13 Aug 2020
First published
14 Aug 2020

Nanoscale, 2020,12, 18576-18594
Article type
Minireview

Colloidal assembly in droplets: structures and optical properties

S. Park, H. Hwang, M. Kim, J. H. Moon and S. Kim, Nanoscale, 2020, 12, 18576 DOI: 10.1039/D0NR04608F

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