Synthesis and Characterization of Closely-Spaced Ultrasmall Quantum Dot Chains Towards Artificial Frenkel-type Exciton Formation

• Project/Area Number: 25286015
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Nanomaterials chemistry
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: Oda Masaru 九州工業大学, 大学院工学研究院, 准教授 (30345334)
• Co-Investigator(Kenkyū-buntansha): TAMOTSU ZAKO 愛媛大学, 理工学研究科, 教授 (50399440)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥19,890,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥4,590,000); Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000); Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000); Fiscal Year 2013: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
• Keywords: 量子ドット / フレンケル励起子 / 1次元配列構造 / DNA / 自己組織化 / 一次元配列構造

Outline of Final Research Achievements

To develop semiconductor materials for the formation of Frenkel-type excitons, we have proposed linear chains of closely spaced ultrasmall semiconductor quantum dots (QDs), as a promising material. This novel nanostructure was designed to simulate linear molecular aggregates in organic materials, in which excitons can form. The proposed synthesis method of QD chain production uses techniques that improve or enhance (1) the synthesis of ultrasmall quantum dots, (2) the ligand exchange method, (3) immobilization of single strand DNA on QDs, and (4) the synthesis of self-assemblies of DNA-functionalized QDs. The resulting QD chains produced were evaluated using time-resolved spectroscopy and transmission electron microscopy to characterize the electronic/optical and nanostructural properties, respectively.

Research Products

• [Journal Article] Dark Field Microscopic Sensitive Detection of Amyloid Fibrils Using Gold Nanoparticles Modified with Antibody (2016)
  • Author(s): Tong Bu, Tamotsu Zako他
  • Journal Title: Analytical Sciences Volume: 32 Issue: 3 Pages: 307-311
  • DOI: 10.2116/analsci.32.307
  • NAID: 130005131631
  • ISSN: 0910-6340, 1348-2246
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] DNAを用いた量子ドット1次元配列構造の作製とその分離・精製法の開発 (2016)
  • Author(s): 西輝，赤木啓人，早川賢治，松尾公祐，小田勝，座古保，前田瑞夫，谷俊朗
  • Organizer: ナノ学会第14回大会
  • Place of Presentation: 北九州国際会議場
  • Year and Date: 2016-06-14
• [Presentation] コロイド状半導体量子ドットにおける増幅キャリア抽出法の新開発 (2016)
  • Author(s): 西行響，赤木啓人，西輝，早川賢治，小田勝
  • Organizer: ナノ学会第14回大会
  • Place of Presentation: 北九州国際会議場
  • Year and Date: 2016-06-14
• [Presentation] DNA を利用した一次元量子ドット配列構造の作製とその光物性 (2015)
  • Author(s): 松尾公祐，赤木啓人，小田勝，座古保，前田瑞夫，谷俊朗
  • Organizer: 第121回日本物理学会九州支部例会
  • Place of Presentation: 九州工業大学
  • Year and Date: 2015-12-05
• [Presentation] DNAを利用した一次元量子ドット配列構造の合成とその物性評価 (2015)
  • Author(s): 赤木啓人，松尾公祐，小田勝，座古保，前田瑞夫，谷俊朗
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2015-09-13
• [Presentation] Self-Assembled Quantum-Dot Chains Linked by DNA: Synthesis, Characterization and Optical Properties (2015)
  • Author(s): Masaru Oda, Hiroto Akagi, Kousuke Matsuo, Tamotsu Zako, Mizuo Maeda, Sachio Naemura, Takahiro Mukasa, Toshiro Tani
  • Organizer: 12th International Conference on Hole Burning, Single Molecule and Related Spectroscopies: Science and Applications
  • Place of Presentation: Tartu, Estnia
  • Year and Date: 2015-08-24
  • Int'l Joint Research
• [Presentation] コロイド状半導体量子ドットによる一次元配列構造の作製とその光学評価 (2014)
  • Author(s): 小田 勝，松尾公祐，赤木啓人,苗村祥央,武笠峻大,谷 俊朗,座古 保,前田瑞夫
  • Organizer: 応用物理学会九州支部学術講演会
  • Place of Presentation: 大分大学(旦野原キャンパス)
  • Year and Date: 2014-12-06 – 2014-12-07
• [Presentation] オリゴDNAを利用した一次元量子ドット近距離配列構造の作製とその光学特性 (2013)
  • Author(s): 小田勝，苗村祥央，武笠峻大，座古 保，前田瑞夫，谷俊朗
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学 （徳島）
• [Presentation] Synthesis and PL properties of one-dimensional chains composed of colloidal CdSe/ZnS QDs linked by DNA (2013)
  • Author(s): Masaru Oda, Sachio Naemura, Takahiro Mukasa, Tamotsu Zako, Mizuo Maeda, and Toshiro Tani
  • Organizer: 18th International Conference on Dynamical Processes in Excited States of Solids (DPC’13)
  • Place of Presentation: Fuzhou (China)
• [Patent(Industrial Property Rights)] 光電変換装置 (2015)
  • Inventor(s): 小田勝
  • Industrial Property Rights Holder: 小田勝
  • Industrial Property Rights Type: 特許
  • Filing Date: 2015-04-02