@article{d9c41a3b59354119a8282bffb707dd44,
title = "Colloidal fibers and rings by cooperative assembly",
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.",
author = "Oh, {Joon Suk} and Sangmin Lee and Glotzer, {Sharon C.} and Yi, {Gi Ra} and Pine, {David J.}",
note = "Funding Information: We thank Francesco Sciortino and Etienne Ducrot for useful conversations. This research was primarily supported by the US Department of Energy (DOE) grant no. DESC0007991 (to J.S.O. and D.J.P.) for initiation, experimental design, analysis, and imaging. J.S.O. and D.J.P acknowledge support by the US National Science Foundation under Award Number DMR-1610788 for initiation, characterization, and electron microscopy. G.R.Y. acknowledges support from the NRF (Korea) under award nos. 2017M3A7B8065528 and 2017R1A5A1070259. Simulation and modeling work (S.L. and S.C.G.) were supported by the Center for Bio-Inspired Energy Science, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award #DE-SC0000989. Computational work used resources and services from the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation grant number ACI-1053575, under XSEDE award DMR 140129, and was also supported in part through computational resources and services provided by Advanced Research Computing at the University of Michigan, Ann Arbor. Publisher Copyright: {\textcopyright} 2019, The Author(s).",
year = "2019",
month = dec,
day = "1",
doi = "10.1038/s41467-019-11915-1",
language = "English (US)",
volume = "10",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}