シリコン・リング・ストレインは,単分子回路で高伝導性の経路を作り出します.
Timothy A Su1, Jonathan R Widawsky, Haixing Li
1Department of Chemistry, Columbia University , New York, New York 10027, United States.
Journal of the American Chemical Society
|November 23, 2013
まとめ
ストレインされたシランは,金電極と直接結合し,並列回路として作用する分子ワイヤを作成します. 研究者は,環境または電極距離を変更することによって導電性を制御することができ,新しいシリコンベースの単一分子電子を可能にします.
科学分野:
- 分子電子は分子電子である.
- ナノテクノロジー ナノテクノロジー
- 表面化学について
背景:
- 単一分子電子は,小型化されたデバイスの可能性を秘めています.
- 分子結合における電荷輸送経路の制御は極めて重要です.
- シリコンベースの分子ワイヤには大きな関心があります.
研究 の 目的:
- ストレートサイランを黄金電極に直接結合することを実証する.
- シリコン分子ワイヤの競合する導電経路を調査する.
- 単一分子結合における伝導性を制御する方法を確立する.
主な方法:
- ゴールド電極上のストレートシランの断路伝導度測定.
- アルキル硫化物のオロフィルを分子ワイヤの末端に利用する.
- エレクトロド表面結合を変更するための環境操作.
- 経路を切り替えるための端子-基板電極距離を調節する.
主要な成果:
- ストレインされたシランは,初めて金電極と直接結合した.
- 分子ワイヤには,低い (硫黄から硫黄) と高い (硫黄からシラサイクル) 伝導率の異なる経路を持つ平行回路があります.
- 高伝導性のシラサイクルの経路は,AU-シラサイクルのカップリングを無効にすることでオフにすることができます.
- 導電経路は,電極距離を調整することによって調節することができます.
結論:
- ストレインシランは,単分子電子機器のための新しい分子設計を提供します.
- 環境制御と電極距離調節により,経路の切り替えが可能になります.
- この研究は,制御可能なシリコンベースの単分子ワイヤーを開発するための道を開きます.
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