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

2015 Fiscal Year Final Research Report

• 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
• 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

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.

Free Research Field

半導体光物性