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Fabrication of Uniform Nanoscale Cavities via Silicon Direct Wafer Bonding
Published on: January 9, 2014
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ナノコンフィネッドシリコンカービッドの液体-液体相転換
Weikang Wu1, Leining Zhang1, Sida Liu1
1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University , Jinan 250061, People's Republic of China.
Journal of the American Chemical Society
|February 10, 2016
まとめ
シリコンカービッドの 液体-液体相変化の 理論的証拠を見つけた この移行には,閉じ込めと圧力によって導かれた層化,密度変化,およびマイクロフェーズ分離が含まれます.
科学分野:
- 材料科学
- 物理化学
- 計算物理
背景:
- 液体カルビッド (SiC) は技術的に重要な材料です.
- 閉じ込められたシステムにおける相変化の理解は,ナノテクノロジーにとって極めて重要です.
- これまでの研究ではSiCの性質が研究されているが,ナノスリートによるLLPTは未十分に研究されている.
研究 の 目的:
- ナノスリットの封じ込め下での液体・液体相変異 (LLPT) の理論的証拠を調査する.
- LLPTに関連する構造と密度の変化を特徴づける.
- 閉じ込め,圧力,および壁-液体の相互作用がLLPTを誘導する役割を明らかにする.
主な方法:
- ナノスリート内での液体カルビドの理論モデル化とシミュレーション.
- 座標番号を含む構造特性の分析 (三座標,四座標,五座標構造)
- 密度変化とマイクロフェーズ分離現象の調査
主要な成果:
- 閉じ込められた液体カルバイドにおける液体-液体相移行 (LLPT) の理論的証拠.
- LLPTは,層の移行,重要な密度の変化,構造的分布の変化 (テトラとペンタコーディネートされた構造) が特徴です.
- マイクロフェーズ分離が起き,シリコンと炭素は強い壁-液体力と異なる調整構造により,壁の近くで異なる層を形成する.
結論:
- ナノスリットの閉じ込めと圧力は,液体シリコンカービッドの液体相移行を誘導することができます.
- LLPTは複雑な構造の再編成とマイクロフェーズ分離を伴うため,シリコンが豊富で炭素が豊富で異なる層になります.
- 閉じ込めと圧力の相互作用は,LLPTの支配的な推進力を決定し,閉じ込めは高圧で支配し,低圧で圧力が支配する.
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