Unidirectional Crystallization of Charged Colloidal Silica under Temperature Gradient

• TOYOTAMA Akiko

  Nagoya City Univ

• YAMANAKA Junpei

  Nagoya City Univ

• YONESE Masakatsu

  Nagoya City Univ

• SAWADA Tsutomu

  National Institute for Materials Science

• UCHIDA Fumio

  Fuji Chemical Co. Ltd

• OHKI Yoshimasa

  Japan Aerospace Exploration Agency

抄録

Submicron-sized charged colloidal particles self-assemble into ‘‘crystal’’ structures in an aqueous medium due to long-range electrostatic interparticle interaction. Since colloidal crystals usually have a Bragg wavelength in the visible-light regime, they have attracted considerable attention as photonic materials. Here, we describe our recent study on the novel crystallization of charged colloids under a temperature gradient. We could obtain well-oriented and large (1 x 10 x ～30 mm) single-domain crystals in a short time (＜10 min) under gravity; moreover, the crystals have sharp and deep transmission dips as well as good spatial uniformity at the Bragg wavelength λB (～0. 1%). However, the fabrication of larger crystals has been difficult because of thermal convection, which inevitably arises under the temperature gradient, and particle sedimentation. We anticipate that microgravity environments will be quite effective in improving the size of crystals as well as their optical quality.

収録刊行物

• 日本マイクログラビティ応用学会誌

  日本マイクログラビティ応用学会誌 25 (3), 479-, 2008-07-31

  日本マイクログラビティ応用学会

詳細情報

• CRID: 1391131406307440256
• NII論文ID: 10024268780
• NII書誌ID: AN10537663
• DOI: 10.15011/jasma.25.3.479
• NDL書誌ID: 9608554
• ISSN: 09153616
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9608554
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可