Tanpopo Cosmic Dust Collector: Silica Aerogel Production and Bacterial DNA Contamination Analysis

DOI DOI Web Site 被引用文献6件 参考文献27件 オープンアクセス
  • Tabata Makoto
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan Department of Physics, Chiba University, Chiba 263-8522, Japan Department of Molecular Biology, Tokyo University of Pharmacy and Life Science, Hachioji 192-0392, Japan
  • Kawaguchi Yuko
    Department of Molecular Biology, Tokyo University of Pharmacy and Life Science, Hachioji 192-0392, Japan
  • Yokobori Shin-ichi
    Department of Molecular Biology, Tokyo University of Pharmacy and Life Science, Hachioji 192-0392, Japan
  • Kawai Hideyuki
    Department of Physics, Chiba University, Chiba 263-8522, Japan
  • Takahashi Jun-ichi
    NTT Microsystem Integration Laboratories, Atsugi 243-0198, Japan
  • Yano Hajime
    Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
  • Yamagishi Akihiko
    Department of Molecular Biology, Tokyo University of Pharmacy and Life Science, Hachioji 192-0392, Japan

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説明

Hydrophobic silica aerogels with ultra-low densities have been designed and developed as cosmic dust capture media for the Tanpopo mission which is proposed to be carried out on the International Space Station. Glass particles as a simulated cosmic dust with 30 _m in diameter and 2.4 g/cm3 in density were successfully captured by the novel aerogel at a velocity of 6 km/s. Background levels of contaminated DNA in the ultra-low density aerogel were lower than the detection limit of a polymerase chain reaction assay. These results show that the manufactured aerogel has good performance as a cosmic dust collector and sufficient quality in respect of DNA contamination. The aerogel is feasible for the biological analyses of captured cosmic dust particles in the astrobiological studies.

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