有機結晶における反極極構造変形と巨大電圧
Kensuke Kobayashi1, Sachio Horiuchi2, Shoji Ishibashi3
1Condensed Matter Research Center (CMRC) and Photon Factory, Institute of Materials Structure Science , High Energy Accelerator Research Organization (KEK) , Tsukuba 305-0801 , Japan.
Journal of the American Chemical Society
|March 6, 2018
まとめ
この研究は,有機反鉄電気結晶は,フィールド誘発の極性交互により巨大な電圧を示していることを示しています. この移行は,高性能の有機電圧材料を開発する可能性を秘めています.
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:
- 有機アンチフェロエレクトリックは,電子機器の潜在的応用を持つ材料のクラスです.
- 外部刺激による構造変化を理解することは 材料設計において極めて重要です
- 有機結晶におけるフィールド誘発の移行は,無機同位体と比較して調査されていない.
研究 の 目的:
- 2トリフローロメチルナフチミダゾールという有機的反鉄電晶における,フィールド誘発の反極極構造変遷を調査する.
- 観測された巨大な電圧の背後にあるメカニズムを明らかにする.
- 新しい有機電圧材料の開発におけるこの移行の可能性を評価する.
主な方法:
- シンクロトロンX線 difraktionは,外部電場の下で結晶構造を分析するために使用されました.
- 構造分析は,水素結合鎖と関連するストレスの調整に焦点を当てた.
- 有機鉄電やセラミック材料との電圧圧の比較
主要な成果:
- 反極構造から極構造へのフィールド誘発の移行が観察された.
- 水素結合の連鎖が並列に並びました
- オーガニック・フェロエレクトリックのピエゾ電気的ストレインより大きく,陶器に匹敵する巨大な電圧が測定された.
- この電圧は,極性交換によるシアストレスの原因で発生した.
結論:
- オーガニックのアンチフェロエレクトリックの反極-反極構造の移行は,巨大な電圧を誘導することができます.
- 水素結合連鎖の極性交互化に関連した切断ストレスは,この効果の起源です.
- この現象は,高性能の電圧性有機材料の開発に有望な経路を示しています.
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