@article{Keler2020-01-01Direc-48150,
  year={2020},
  doi={10.1063/1.5124895},
  title={Direct-imaging of light-driven colloidal Janus particles in weightlessness},
  number={1},
  volume={91},
  issn={0034-6748},
  journal={Review of Scientific Instruments},
  author={Keßler, Raphael and Bräuer, Dirk and Dreißigacker, Christoph and Drescher, Jörg and Lozano, Celia and Bechinger, Clemens and Born, Philip and Voigtmann, Thomas},
  note={Article Number: 013902}
}

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    <dc:creator>Dreißigacker, Christoph</dc:creator>
    <dc:contributor>Drescher, Jörg</dc:contributor>
    <dc:creator>Drescher, Jörg</dc:creator>
    <dcterms:title>Direct-imaging of light-driven colloidal Janus particles in weightlessness</dcterms:title>
    <dc:creator>Keßler, Raphael</dc:creator>
    <dc:contributor>Voigtmann, Thomas</dc:contributor>
    <dc:contributor>Keßler, Raphael</dc:contributor>
    <dc:contributor>Born, Philip</dc:contributor>
    <dc:contributor>Lozano, Celia</dc:contributor>
    <dc:contributor>Bechinger, Clemens</dc:contributor>
    <dc:contributor>Bräuer, Dirk</dc:contributor>
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    <dc:creator>Voigtmann, Thomas</dc:creator>
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    <dcterms:abstract xml:lang="eng">We describe a highly integrated automated experiment module that allows us to investigate the active Brownian motion of light-driven colloidal Janus-particle suspensions. The module RAMSES (RAndom Motion of SElf-propelled particles in Space) is designed for the sounding rocket platform MAPHEUS (MAterialPHysikalische Experimente Unter Schwerelosigkeit). It allows us to perform experiments under weightlessness conditions in order to avoid sedimentation of the Janus particles and thus to study the spatially three-dimensional dynamics in the suspension. The module implements a newly developed strong homogeneous light source to excite self-propulsion in the Janus particles. The light source is realized through an array of high-power light-emitting diodes and replaces the conventional laser source, thus reducing heat dissipation and spatial extension of the experiment setup. The rocket module contains ten independent sample cells in order to ease the systematic study of the effect of control parameters such as light intensity or particle concentration and size in a single sounding-rocket flight. For each sample cell, transmitted light intensities are stored for postflight analysis in terms of differential dynamical microscopy.</dcterms:abstract>
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    <dc:creator>Lozano, Celia</dc:creator>
    <dc:creator>Bräuer, Dirk</dc:creator>
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    <dc:contributor>Dreißigacker, Christoph</dc:contributor>
    <dc:creator>Bechinger, Clemens</dc:creator>
    <dc:creator>Born, Philip</dc:creator>
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