Colloidal fibers and rings by cooperative assembly

Joon Suk Oh, Sangmin Lee, Sharon C. Glotzer, Gi Ra Yi, David Pine

Research output: Contribution to journalArticle

Abstract

Janus colloids with one attractive patch on an otherwise repulsive particle surface serve as model systems to explore structure formation of particles with chemically heterogeneous surfaces such as proteins. While there are numerous computer studies, there are few experimental realizations due to a lack of means to produce such colloids with a well-controlled variable Janus balance. Here, we report a simple scalable method to precisely vary the Janus balance over a wide range and selectively functionalize one patch with DNA. We observe, via experiment and simulation, the dynamic formation of diverse superstructures: colloidal micelles, chains, or bilayers, depending on the Janus balance. Flexible dimer chains form through cooperative polymerization while trimer chains form by a two-stage process, first by cooperative polymerization into disordered aggregates followed by condensation into more ordered stiff trimer chains. Introducing substrate binding through depletion catalyzes dimer chains to form nonequilibrium rings that otherwise do not form.

Original languageEnglish (US)
Article number3936
JournalNature Communications
Volume10
Issue number1
DOIs
StatePublished - Dec 1 2019

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Colloids
Janus
Polymerization
Dimers
assembly
fibers
Fibers
rings
Micelles
Condensation
trimers
colloids
polymerization
dimers
DNA
Substrates
Proteins
Experiments
micelles
depletion

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Colloidal fibers and rings by cooperative assembly. / Oh, Joon Suk; Lee, Sangmin; Glotzer, Sharon C.; Yi, Gi Ra; Pine, David.

In: Nature Communications, Vol. 10, No. 1, 3936, 01.12.2019.

Research output: Contribution to journalArticle

Oh, Joon Suk ; Lee, Sangmin ; Glotzer, Sharon C. ; Yi, Gi Ra ; Pine, David. / Colloidal fibers and rings by cooperative assembly. In: Nature Communications. 2019 ; Vol. 10, No. 1.
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