非線形脊椎を持つポリポルフィリンオリゴマーの負の微分伝導
Guowen Kuang1, Shi Zhang Chen2, Linghao Yan1
1Department of Physics, The Hong Kong University of Science and Technology , Hong Kong, China.
Journal of the American Chemical Society
|December 29, 2017
まとめ
ポリポルフィリンオリゴマーの負の微分伝導 (NDC) を観察した. 観察されたNDC効果は,分子骨格に依存していた.
科学分野:
- 分子電子
- オーガニックの電子機器
- 量子輸送
背景:
- ネガティブ・ディフェンシャル・コンダクタンス (NDC) は,電子機器の重要な現象である.
- ポリピロールオリゴーマーには 調節可能な電子特性があります
- ナノエレクトロニクスでは,分子ワイヤでの電荷輸送を制御することが重要です.
研究 の 目的:
- 非線形脊椎を持つポリピロールオリゴマーのNDC効果を調査する.
- 分子構造が電荷輸送に及ぼす影響を理解する.
- 分子電子装置の設計の可能性を探る
主な方法:
- 単分子輸送測定のための低温スキャニングトンネル顕微鏡 (LT-STM).
- 密度関数理論 (DFT) と非均衡グリーンの関数 (NEGF) を組み合わせて理論的シミュレーションを行う.
- オリゴーマーワイヤの電荷輸送経路の選択的制御
主要な成果:
- 堅固なNDCがT形の交差点で観測されました.
- ビスタブルなNDCを90度で検出した.
- 120°のキック・ジャンクションで NDC は見つかりませんでした.
- バイアス調節された電極分子軌道ハイブリッド化によるバックボーン依存のNDC.
結論:
- 分子骨格構造は,ポリピロールオリゴマーのNDC効果を決定する.
- 観察されたメカニズムは分子システムに共通しています.
- 分子NDC装置を設計するための新しい道を開きます.
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