タイプIIのCdSe/CdTeナノロードヘテロ構造におけるアニゾトロプ的ストレスの誘発による曲線
Hunter McDaniel1, Jian-Min Zuo, Moonsub Shim
1Department of Materials Science and Engineering and Frederic Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Journal of the American Chemical Society
|February 19, 2010
まとめ
合成されたカドミウムセレニド/カドミウムテルリド (CdSe/CdTe) ナノロドヘテロ構造は,ストレスを誘発した曲線を示します. この制御された曲線は,エネルギーアプリケーションのためのナノロードヘテロ構造に光生成されたキャリアを誘導するための新しい経路を提供します.
科学分野:
- 材料科学 材料科学とは
- ナノテクノロジー ナノテクノロジー
- 固体物理 固体物理学
背景:
- タイプII帯域オフセットヘテロ構造は,光電子機器にとって極めて重要です.
- ナノ構造の形状を制御することは,材料の特性を調節する鍵です.
- ナノ材料におけるストレスエンジニアリングは,電子的および光学的特性を大幅に変化させることができます.
研究 の 目的:
- 曲線および線形CdSe/CdTeナノロードヘテロ構造を合成し,特徴づけること.
- 菌株の起源と,その影響がナノロード形態学に及ぼす影響を調査する.
- エネルギーアプリケーションのストレンス制御の可能性を調査する.
主な方法:
- CdSe/CdTe ナノロードヘテロ構造の合成.
- 構造分析のための原子解像度の伝送電子顕微鏡 (ARTEM).
- 網格の歪みを理解するためのストレンス分析.
主要な成果:
- CdSeの種子上のCdTeの成長における格子不一致からのストレスは,ナノロッドの曲線を誘導します.
- 曲線ナノロッドは,CdSeの圧縮性ストレスのために予想される不一致を上回る格子膨張を示しています.
- 尖端の成長によって形成された線形ヘテロ構造は,ストレスを誘発した曲線を示さない.
結論:
- アニゾトロプ的格子菌株は,様々な成長条件によって制御できます.
- CdSe/CdTeナノードにおけるストレインジニアリングは,電子構造を調整するための経路を提供します.
- この制御は,先進的なエネルギーアプリケーションのための光発電キャリアの指示を容易にします.
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