準球体理論によるセラミックのような分子鉄電力の合理的設計
Zhen-Hong Wei1, Zhen-Tao Jiang1, Xiu-Xiu Zhang1
1Ordered Matter Science Research Center , Nanchang University , Nanchang 330031 , People's Republic of China.
Journal of the American Chemical Society
|January 9, 2020
まとめ
研究者は新しいセラミックのような分子フェロエレクトリック [3.2.1-dabco]BF4を柔軟な電子機器のために開発しました. この材料は,室温の多結晶薄膜で優れたフェロ電気性能を示す.
科学分野:
- 材料科学
- 固体物理学
- クリスタルグラフィー
背景:
- 分子フェロエレクトリックは従来の陶器よりも柔軟性や環境に優しい加工などの利点があります.
- ポリクリスタル分子フェロエレクトリックの開発は,実用的な応用には依然として課題です.
研究 の 目的:
- 多結晶薄膜の用途のために強化された特性を有するセラミックのような分子フェロエレクトリックを合成する.
- フェロ電気性能の改善のための分子設計戦略を探求する.
主な方法:
- 準球形理論に基づく1,5-ディアザビサイクロ[3.2.1]オクトニウムテトラフローロボラート ([3.2.1-ダブコ]BF4) の合成.
- 準球形を維持しながら対称性を減らすために,カチオン構造 ([2.2.2-dabco]+から[3.2.1-dabco]+) を変更する.
- 多結晶薄膜の相変化と鉄電性体の特徴
主要な成果:
- [3.2.1-dabco]BF4を357 Kのm3mFmm2の相変異で成功して合成した.
- 室温でポリ結晶薄膜形式で優れたフェロ電気性能を達成した.
- [2.2.2-dabco]BF4と比較して4. 9μC cm-2から5. 5μC cm-2に自発的偏化 (Ps) が増加した.
- 分子設計で極軸の数を6つにしました
結論:
- 準球理論は,セラミックのような分子フェロエレクトリックを設計するための実行可能な経路を提供します.
- 精密な分子設計は,特にカチオン対称性を変化させ,フェロ電気的特性を高めるのに効果的です.
- [3.2.1-dabco]BF4は柔軟な電子機器の大きな可能性を 示しています
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