エチレンダイアミンはCuの酸化を阻害することによってCuナノワイヤの成長を促進する
Myung Jun Kim1, Patrick F Flowers1, Ian E Stewart1
1Department of Chemistry, Duke University , 124 Science Drive, Box 90354, Durham, North Carolina 27708, United States.
Journal of the American Chemical Society
|December 16, 2016
まとめ
エチレンダイアミンは 一般的なキャピング剤で 銅ナノワイヤの成長を驚異的に加速し 特定の結晶の側面に 原子添加を加速し ブロックしません この発見は,アニゾトロプ的金属ナノ構造の形成に関する理解を再定義する.
科学分野:
- 電気化学
- 材料科学
- ナノテクノロジー
背景:
- キャピング剤は,通常,特定の結晶面への原子添加をブロックし,金属ナノ構造のアニゾトロプ的成長を誘導すると考えられています.
- カップリング剤がフェセット選択的成長に影響を与える正確なメカニズムは,まだ完全に理解されていません.
研究 の 目的:
- 銅ナノワイヤの合成を制御する側面選択化学を解明する.
- エチレンダイアミンがアニゾトロプ的成長を制御する上限剤としての役割を調査する.
主な方法:
- 電気化学的な測定
- クォーツ結晶の微小バランス分析
- シングルクリスタル電極の研究
主要な成果:
- エチレンジアミンは,銅ナノワイヤの合成中に,100の側面に対して111の側面への原子添加率を増加させます.
- エチレンダイアミンは,Cu (((100)) 表面と比較して,Cu (((OH)) 2-の減少率を高めます.
- これは,Cu ((111)) 面での銅酸化物の形成を選択的に抑制しているため起こります.
結論:
- この研究は,キャピング剤が原子添加を阻害するという支配的な仮説に異議を唱えている.
- エチレンダイアミンは,特定の側面への原子添加を加速することによって,アニソトロプ的成長を促進します.
- 面選択電気化学は,アニゾトロプ的金属ナノ構造の組み立てを理解するために不可欠です.
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