シリコンのエキゾチック相のコロイド合成:BC8構造のBC8構造

Shreyashi Ganguly¹, Nasrin Kazem, Danielle Carter

¹Department of Chemistry, University of California , Davis, California 95616, United States.

Journal of the American Chemical Society

|January 9, 2014

まとめ

研究者らは,コロイド方式を用いて初めて,転移性BC8構造のシリコンナノ粒子 (Si NPs) を合成した. これらの新しいSiNPは,将来の太陽電池アプリケーションの可能性を示しています.

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
固体化学固体化学

背景:

ナノ粒子 (NP) アロトロップとポリモルフ合成は急速に進歩している分野です.
シリコン (Si) を含むグループ14の元素は,重要な技術的な応用を持つ多様なアロトロプを示しています.

研究の目的:

BC8結晶構造におけるシリコンナノ粒子 (Si NPs) の最初の合成について報告する.
合成されたSi NPsを特徴付け,その構造と特性を確認する.

主な方法:

n-ブチルリチウムによるシリコンテトライオイド (SiI4) の還元を含むコロイド合成.
ナノ粒子の表面をオクタノールで封じ,溶液から降水する.
伝送電子顕微鏡 (TEM),選択領域電子 difraktion (SAED),粉末X線 difraktion (PXRD) を利用した構造的特徴付け.

主要な成果:

Si NPsの結晶化がBC8構造に成功した合成.
TEMとSAEDのデータは,BC8段階と一致する格子フリンジと微分パターンを確認した.
PXRD分析とラーマンスペクトロスコピーは,BC8の結晶構造のさらなる裏付けを提供しました.

結論:

コロイド合成経路は,転移性BC8構造におけるSiNPの生成に有効である.
これらのBC8 Si NPは,バンドギャップの最適化を待っている太陽電池アプリケーションの潜在的な候補です.

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