Colloidal assembly in droplets: Structures and optical properties

Sanghyuk Park, Hyerim Hwang, Minjung Kim, Jun Hyuk Moon, Shin Hyun Kim

Research output: Contribution to journalReview articlepeer-review

25 Scopus citations


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) ≤ N ≤ O(104)), and large (N ≥ O(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.

Original languageEnglish
Pages (from-to)18576-18594
Number of pages19
Issue number36
StatePublished - 28 Sep 2020

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© The Royal Society of Chemistry.


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