二次元コバルトジチオレン金属有機フレームワークにおける金属伝導性
Andrew J Clough1, Jonathan M Skelton2, Courtney A Downes1
1Department of Chemistry, University of Southern California (USC) , Los Angeles, California 90089, United States.
Journal of the American Chemical Society
|July 14, 2017
まとめ
この研究は,金属伝導性を示す最初の金属有機フレームワーク (MOF) を明らかにした. 温度に依存する研究は,2D MOFの半導体から金属へのユニークな移行を示しています.
科学分野:
- 材料科学
- 凝縮物質物理学
- ナノテクノロジー
背景:
- 二次元 (2D) メタル・オーガニック・フレームワーク (MOF) は,有利な電荷輸送特性により,電子アプリケーションにおける潜在能力が認められています.
- 研究は,2D MOFの電荷キャリアの移動性を強化し,抵抗性を減らすことに焦点を当てている.
研究 の 目的:
- 特定の2DコバルトベースのMOFの温度依存の電荷輸送特性を調査する.
- この新しいMOF材料で半導体から金属相への移行を調査する.
主な方法:
- 2Dコバルト2,3,6,7,10,11-トリフェニレンヘクサチオラートフレームの薄膜で変数温度抵抗測定を行った.
- 電子構造を分析し,観測された伝導性を理解するために,密度関数理論 (DFT) の計算を使用した.
主要な成果:
- 温度が下がるにつれて,半導体から金属の動作への移行が観察され,これは以前はMOFで見られなかった現象である.
- この移行は,膜の厚さや,MOFの毛穴内の溶媒分子の存在に敏感であることが判明した.
- DFTの計算は,材料で観察された複雑な金属伝導性を裏付けました.
結論:
- この研究は,金属・有機構造における帯状金属伝導性の最初の実験的観測を報告している.
- この発見は,高度なアプリケーションのための調整可能な電子特性を持つMOFの設計のための新しい道を開きます.
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