単一壁の炭素ナノチューブネットワークの電子特性
Elena Bekyarova1, Mikhail E Itkis, Nelson Cabrera
1Center for Nanoscale Science and Engineering, University of California, Riverside, California 92521, USA.
Journal of the American Chemical Society
|April 21, 2005
まとめ
単一壁の炭素ナノチューブ (SWNT) の化学機能化は,それらの電子特性を大幅に変化させます. SWNTを修正すると,伝導性が影響され,先進的なSWNTベースのセンサーの開発に不可欠です.
科学分野:
- マテリアルサイエンス 材料科学
- ナノテクノロジー ナノテクノロジー
- 凝縮物質物理学 凝縮物質物理学
背景:
- 単一壁の炭素ナノチューブ (SWNT) は,ユニークな電子特性を有しています.
- SWNTの動作を理解することは,センサーアプリケーションの鍵です.
- フィルムの伝導性は,ナノチューブの純度と加工によって影響を受けます.
研究 の 目的:
- SWNTフィルムの電子特性を調査するために.
- SWNTの伝導性に対する化学機能化の効果を証明するために.
- SWNTベースのセンサーのメカニズムを解明する.
主な方法:
- スプレーデポジションを用いたSWNTフィルムの製造.
- 光学スペクトル顕微鏡を用いた効果フィルム厚さの測定.
- 室温での電気伝導性の特徴とその温度依存性について.
主要な成果:
- 精製され浄化されたSWNTフィルムでは,導電性は250~400S/cmである.
- 非金属の温度依存は,トンネルのバリアが導電性を支配していることを示している.
- ODAとPABSによる化学機能化は,導電性をそれぞれ3S/cmと0.3S/cmに大幅に低下させる.
結論:
- 化学的機能化は,SWNTの電子特性を批判的に変更します.
- トンネルバリアは,SWNTフィルムの伝導性に大きく影響します.
- 機能化効果は,SWNTセンサーメカニズムについての洞察を提供します.
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