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Bae, Sung Chul
Multiscale Optical Imaging Lab
Research Interests
  • Multiscale optical imaging, laser spectroscopy, laser microscopy, laser sensing, soft matter physics, surface and interfacial science, laser Matter Interaction

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Staged Self-Assembly of Colloidal Metastructures

Cited 20 times inthomson ciCited 13 times inthomson ci
Title
Staged Self-Assembly of Colloidal Metastructures
Author
Chen, QianBae, Sung ChulGranick, Steve
Issue Date
2012-07
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.134, no.27, pp.11080 - 11083
Abstract
We demonstrate sequential assembly of chemically patchy colloids such that their valence differs from stage to stage to produce hierarchical structures. For proof of concept, we employ ACB triblock spheres suspended in water, with the C middle band electrostatically repulsive. In the first assembly stage, only A-A hydrophobic attraction contributes, and discrete clusters form. They can be stored, but subsequently activated to allow B-B attractions, leading to higher-order assembly of clusters with one another. The growth dynamics, observed at a single particle level by fluorescence optical microscopy, obey the kinetics of stepwise polymerization, forming chains, pores, and networks. Between linked clusters, we identify three possible bond geometries, linear, triangular, and square, by an argument that is generalizable to other patchy colloid systems. This staged assembly strategy offers a promising route to fabricate colloidal assemblies bearing multiple levels of structural and functional complexity.
URI
https://scholarworks.unist.ac.kr/handle/201301/7052
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84863822917
DOI
10.1021/ja303434d
ISSN
0002-7863
Appears in Collections:
CHM_Journal Papers
BME_Journal Papers
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