分子補正:自己組み立てモノレイヤーで,ドナー-ピ-ブリッジ-受容器の部分が中心に位置し,両金の電極に対称的に結合されています

Geoffrey J Ashwell¹, Wayne D Tyrrell, Anne J Whittam

¹Nanomaterials Group, Cranfield University, Cranfield MK43 0AL, UK. g.j.ashwell@cranfield.ac.uk

Journal of the American Chemical Society

|June 4, 2004

まとめ

自己組み立てモノレイヤーは,切り替え可能な電子補正を示します. この分子電子行動は,酸塩基蒸気曝露で調節可能であり,新しい電子機器の開発に不可欠です.

科学分野:

分子電子は分子電子である.
表面科学とは,地表科学のことである.
オーガニック・エレクトロニクス

背景:

自己組み立てモノレイヤー (SAM) は,分子電子工学にとって極めて重要です.
ドナー-受容体分子は,電子非対称性を生み出すための重要な構成要素です.
分子レベルで電荷輸送を制御することは大きな課題です.

研究の目的:

新しいSAMの電流-電圧 (I-V) 特性について調査する.
これらの分子システムの切り替え可能な補正行動を探求するために.
電子補正における分子構造の役割を理解する.

主な方法:

1-(10-アセチルスルファニルデシル) -4-[2-(4-ジメチラミノフェニル) ビニル]キノリウムヨウ酸化物を用いたSAMの製造.
スキャントンネル顕微鏡 (STM) を使用したI-V特性の測定.
リバーシブルスイッチングを研究するために,HClとNH3の蒸気へのSAMの暴露.

主要な成果:

SAMは非対称なI-V特性を有しており,有意な補正が行われている.
補正は,HCl (抑制) とNH3 (復元) に曝露することで,可逆的に切り替えられました.
ステリカルに阻害されたドナー-ピ-ブリッジ-受容体 (D-pi-A) 部分は,平面的または弱いD-pi-Aシステムとは異なり,修正に不可欠でした.

結論:

観測された修正は,SAM内のD-pi-A染色体に固有のものです.
HClによる分子内電荷移転軸のプロトネーションは,補正を阻害する.
この研究は,SAMをベースにした切り替え可能な分子電子装置を実証している.

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