---
res:
  bibo_abstract:
  - Light-activated self-propelled colloids are synthesized and their active motion
    is studied using optical microscopy. We propose a versatile route using different
    photoactive materials, and demonstrate a multiwavelength activation and propulsion.
    Thanks to the photoelectrochemical properties of two semiconductor materials (α-Fe2O3
    and TiO2), a light with an energy higher than the bandgap triggers the reaction
    of decomposition of hydrogen peroxide and produces a chemical cloud around the
    particle. It induces a phoretic attraction with neighbouring colloids as well
    as an osmotic self-propulsion of the particle on the substrate. We use these mechanisms
    to form colloidal cargos as well as self-propelled particles where the light-activated
    component is embedded into a dielectric sphere. The particles are self-propelled
    along a direction otherwise randomized by thermal fluctuations, and exhibit a
    persistent random walk. For sufficient surface density, the particles spontaneously
    form ‘living crystals’ which are mobile, break apart and reform. Steering the
    particle with an external magnetic field, we show that the formation of the dense
    phase results from the collisions heads-on of the particles. This effect is intrinsically
    non-equilibrium and a novel principle of organization for systems without detailed
    balance. Engineering families of particles self-propelled by different wavelength
    demonstrate a good understanding of both the physics and the chemistry behind
    the system and points to a general route for designing new families of self-propelled
    particles.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Jérémie A
      foaf_name: Palacci, Jérémie A
      foaf_surname: Palacci
      foaf_workInfoHomepage: http://www.librecat.org/personId=8fb92548-2b22-11eb-b7c1-a3f0d08d7c7d
    orcid: 0000-0002-7253-9465
  - foaf_Person:
      foaf_givenName: S.
      foaf_name: Sacanna, S.
      foaf_surname: Sacanna
  - foaf_Person:
      foaf_givenName: S.-H.
      foaf_name: Kim, S.-H.
      foaf_surname: Kim
  - foaf_Person:
      foaf_givenName: G.-R.
      foaf_name: Yi, G.-R.
      foaf_surname: Yi
  - foaf_Person:
      foaf_givenName: D. J.
      foaf_name: Pine, D. J.
      foaf_surname: Pine
  - foaf_Person:
      foaf_givenName: P. M.
      foaf_name: Chaikin, P. M.
      foaf_surname: Chaikin
  bibo_doi: 10.1098/rsta.2013.0372
  bibo_issue: '2029'
  bibo_volume: 372
  dct_date: 2014^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/1364-503X
  - http://id.crossref.org/issn/1471-2962
  dct_language: eng
  dct_publisher: The Royal Society@
  dct_subject:
  - General Engineering
  - General Physics and Astronomy
  - General Mathematics
  dct_title: Light-activated self-propelled colloids@
  fabio_hasPubmedId: '25332383'
...