Header logo is pf

Chemical micromotors self-assemble and self-propel by spontaneous symmetry breaking

2018

Article

pf


Self-propelling chemical motors have thus far required the fabrication of Janus particles with an asymmetric catalyst distribution. Here{,} we demonstrate that simple{,} isotropic colloids can spontaneously assemble to yield dimer motors that self-propel. In a mixture of isotropic titanium dioxide colloids with photo-chemical catalytic activity and passive silica colloids{,} light illumination causes diffusiophoretic attractions between the active and passive particles and leads to the formation of dimers. The dimers constitute a symmetry-broken motor{,} whose dynamics can be fully controlled by the illumination conditions. Computer simulations reproduce the dynamics of the colloids and are in good agreement with experiments. The current work presents a simple route to obtain large numbers of self-propelling chemical motors from a dispersion of spherically symmetric colloids through spontaneous symmetry breaking.

Author(s): Yu, Tingting and Chuphal, Prabha and Thakur, Snigdha and Reigh, Shang Yik and Singh, Dhruv P. and Fischer, Peer
Journal: Chem. Commun.
Pages: -
Year: 2018
Month: August
Day: 09
Publisher: The Royal Society of Chemistry

Department(s): Micro, Nano, and Molecular Systems
Bibtex Type: Article (article)

DOI: 10.1039/C8CC06467A
URL: http://dx.doi.org/10.1039/C8CC06467A

BibTex

@article{C8CC06467A,
  title = {Chemical micromotors self-assemble and self-propel by spontaneous symmetry breaking},
  author = {Yu, Tingting and Chuphal, Prabha and Thakur, Snigdha and Reigh, Shang Yik and Singh, Dhruv P. and Fischer, Peer},
  journal = {Chem. Commun.},
  pages = {-},
  publisher = {The Royal Society of Chemistry},
  month = aug,
  year = {2018},
  url = {http://dx.doi.org/10.1039/C8CC06467A},
  month_numeric = {8}
}