炭素ナノチューブの単電子トランジスタは,室温で作られます

H W Postma¹, T Teepen, Z Yao

¹Department of Applied Physics and DIMES, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands.

Science (New York, N.Y.)

|July 7, 2001

まとめ

室温単電子トランジスタは,個々の炭素ナノチューブ分子を用いて作成されました. これらの装置は,室温でクーロン充電を示し,新しいナノスケール電子機器の道を開く.

科学分野:

凝縮物質物理学凝縮物質物理学
ナノテクノロジーナノテクノロジー
マテリアルサイエンス材料科学

背景:

シングル電子トランジスタ (SET) は,量子コンピューティングとセンシティブエレクトロニクスにとって極めて重要です.
炭素ナノチューブ (CNT) は,ナノスケールのデバイスにユニークな電子特性を提供します.
SETで室温での動作を達成することは,依然として大きな課題です.

研究の目的:

シングル電子トランジスタの室温での動作を実証する.
個々の金属単一壁の炭素ナノチューブ分子の電子輸送特性を調査する.
将来の電子アプリケーションのためのCNTの可能性を調査する.

主な方法:

個々の金属単一壁の炭素ナノチューブ分子を用いてSETの製造.
原子力顕微鏡 (AFM) を使用してナノチューブ内の局所的障壁の誘導.
室温および低温での電気輸送測定.

主要な成果:

個々のCNT分子に室温単電子トランジスタを成功裏に実現した.
室温でクオロンブ充電を観測し,それに加えて有意なエネルギー (120 meV) が加わります.
低温での量子エネルギーレベルの解像度と,従来とは異なる力法則依存性の観測.

結論:

個々の金属単一壁の炭素ナノチューブは,室温単一電子トランジスタとして機能することができます.
観測された輸送特性は,共振トンネリングルティンガー-液体メカニズムを示唆しています.
これらの発見は,先進的なナノスケール電子機器の開発のための新しい道を開きます.

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