原子に近い滑らかさを持つ水溶液前駆体からの無形混合金属酸化物薄膜
Matthew G Kast1, Elizabeth A Cochran1, Lisa J Enman1
1Department of Chemistry and Biochemistry and the Materials Science Institute, University of Oregon , Eugene, Oregon 97403, United States.
Journal of the American Chemical Society
|December 17, 2016
まとめ
研究者は新しい,超滑らかな,組成的に均質な無形金属酸化物薄膜を開発しました. この汎用性のあるプラットフォームは,触媒と太陽エネルギーのアプリケーションにチューニング可能な特性を可能にします.
科学分野:
- 材料科学
- 薄膜の沈殿
- ナノテクノロジー
背景:
- 調整可能な均質な薄膜は,高度なアプリケーションに不可欠です.
- 既存の方法は,しばしば粗いまたは相分離したフィルムを生成します.
研究 の 目的:
- 形のない固体溶液の薄膜を合成し,特徴づけること.
- アルミニウム酸化物と移行金属酸化物の調節可能で均質な組成物を達成する.
- 制御された薄膜合成のための汎用的なプラットフォームを確立する.
主な方法:
- 水溶液から移行金属窒素と酸化アルミニウム窒素のクラスター種を急速分解して合成する.
- 構成,形状,表面の粗さを含むフィルムの特性.
- アモルフとナノ結晶膜の形成を制御する化学的原理の評価.
主要な成果:
- 密度,超滑らか (Rrms < 1 nm),原子混合の無形金属酸化物合金フィルムを成功して合成した.
- 様々な過渡金属酸化物 (例えば,VOx,CrOx,MnOx,Fe2O3,CoOx,NiO,CuOx,ZnO) に関する広範な組成の調整性が実証されている.
- VCrMnFeZnAlOxとVCrFeAlOxによって示される,調節可能な性質を持つ非常に均一な無形フィルムを達成した.
結論:
- 開発された方法は,制御された組成を持つ高品質の無形金属酸化物フィルムへの簡単な経路を提供します.
- このプラットフォームは,構成,d電子濃度,および結晶性の影響を隔離することによって基本的な研究を可能にします.
- 潜在的応用には,太陽電池におけるインターフェイス現象と異質な触媒の制御が含まれます.
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