One-Dimensional Assembly of Colloidal Quantum Dots

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02554
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 28010:Nanometer-scale chemistry-related
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Pu Yong-Jin 国立研究開発法人理化学研究所, 創発物性科学研究センター, チームリーダー (00350489)
• Co-Investigator(Kenkyū-buntansha): 榎本 航之 山形大学, 大学院基盤教育機構, 助教 (50823556)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 量子ドット / 半導体ナノ微粒子 / 半導体ナノ結晶

Outline of Final Research Achievements

New cyclic ligands were synthesized and a library of cyclic ligands with extremely uniform ring size (molecular weight distribution less than 1.01) was successfully prepared by size exclusion chromatography. By providing an alkyl spacer, we succeeded in quantitatively converting the functional group from phenol to thiol. It was demonstrated that the size ratio and shape of the cyclic ligands and colloidal quantum dots affect the arrangement of assembly. We found that cadmium sulfide quantum dots formed a gel in the presence of dicadmium tetraolate in hydrophobic media. By electrospinning the gel, we successfully achieved the formation of long-range ordered one-dimensional assembly with several hundred micrometers in length.

Free Research Field

材料化学

Academic Significance and Societal Importance of the Research Achievements

本研究では、環状配位子と量子ドットのサイズ比が低次元配列に与える影響を明らかにしている。また、コロイド量子ドットゲルを作製し、コロイド量子ドットの1次元長周期構造の形成に成功している。本成果によって見出されたコロイド量子ドットの低次元配列の新規手法は、量子細線を用いた様々な光・電子デバイス、情報デバイスへの応用が期待される。