Dipolar colloids in apolar media: direct microscopy of two-dimensional suspensions

@inproceedings{Janai2016DipolarCI,
  title={Dipolar colloids in apolar media: direct microscopy of two-dimensional suspensions},
  author={Erez Janai and Avner P. Cohen and Alexander V. Butenko and Andrew B Schofield and Moty Schultz and Eli Sloutskin},
  booktitle={Scientific reports},
  year={2016}
}
Spherical colloids, in an absence of external fields, are commonly assumed to interact solely through rotationally-invariant potentials, u(r). While the presence of permanent dipoles in aqueous suspensions has been previously suggested by some experiments, the rotational degrees of freedom of spherical colloids are typically neglected. We prove, by direct experiments, the presence of permanent dipoles in commonly used spherical poly(methyl methacrylate) (PMMA) colloids, suspended in an apolar… CONTINUE READING
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