アゾベンゼンは,ナノスケール金属-分子-金属結合における光制御分子電子スイッチとして使用されています
Jeffrey M Mativetsky1, Giuseppina Pace, Mark Elbing
1ISIS-CNRS 7006, Université Louis Pasteur, 8 allée Gaspard Monge, 67000 Strasbourg, France.
Journal of the American Chemical Society
|June 26, 2008
まとめ
金属-分子-金属の接合点におけるアゾベンゼン分子の光イソメリゼーションにより,電気伝導性が30倍に増加しました. 誘導性原子力顕微鏡を用いて観察されたこの切り替えの行動は,分子構成の変化によるものです.
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
- フォトケミストリー フォトケミストリー
背景:
- アゾベンゼン分子には光異性化があり,光に曝露すると分子構造の可逆的な変化である.
- 金属-分子-金属の結合は,分子電子機器にとって極めて重要です.
研究 の 目的:
- アゾベンゼン基の分子を用いてナノスケープの接合点における導電性スイッチングを調査する.
- 電気特性の変化と光イソメリゼーションを相関させるため.
主な方法:
- 導電性原子力顕微鏡 (C-AFM) を使用したナノスケープの金属-分子-金属結合の製造.
- 金で支えられたアゾベンゼン自己組み立てモノレイヤの形成.
- 交差点の電気的特徴について.
主要な成果:
- アゾベンゼン基の交差点において,有意な伝導電流のスイッチングが観察されました.
- 写真イソメリゼーションに起因する導電性の30倍の増加を測定しました.
- 分子構造の変化によるトンネリングバリアの長さの減少と導電性の増加を相関させた.
結論:
- アゾベンゼンフォトアイソメリゼーションは,ナノスケープの交差点における電気伝導性を効果的に制御することができます.
- 分子スイッチとメモリデバイスのためのアゾベンゼン分子の可能性を示した.
- C-AFMアプローチは,単分子結合の電子特性を探査するのに適しています.
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