ラングミュア・ブロジェットのフィルムに張った層のヴァン・デル・ワールスのエピタキシ

R Viswanathan¹, J A Zasadzinski, D K Schwartz

¹Department of Chemical and Nuclear Engineering, University of California, Santa Barbara 93106.

Science (New York, N.Y.)

|July 23, 1993

まとめ

鉛とマンガンの脂肪酸塩のラングミュア・ブロジェット膜は,秩序ある構造と基板の整列を示しています. 厚いフィルムは,カドミウムフィルムや酸化シリコンのフィルムとは異なり,ボリューム構造へと進化します.

科学分野:

材料科学材料科学とは
表面科学とは,地表科学である.
ナノテクノロジーナノテクノロジー

背景:

Langmuir-Blodgettフィルムは,オーダーされた分子層を作成するために使用されます.
これらのフィルムの構造的進化を理解することは,それらのアプリケーションにとって極めて重要です.
基板の相互作用は,膜の形態学に大きな影響を与えます.

研究の目的:

鉛とマンガンの脂肪酸塩単層の構造的順序と基板の整列を調査する.
これらのフィルムの構造的振る舞いをカドミウム脂肪酸塩および異なる基板と比較するために.
膜の厚さがモノレイヤーからバルク構造への進化にどのように影響するかを理解する.

主な方法:

フィルムをイメージするために原子力顕微鏡 (AFM) が使用されました.
Langmuir-Blodgettの堆積技術は,多層のフィルムを作成するために使用されました.
格子対称性と表面形態学の分析が行われました.

主要な成果:

ミカ上の鉛とマンガン脂肪酸塩の単層は,異なる格子対称性にもかかわらず,長距離の秩序と基板の配列を示しています.
ミカ上の連続した膜の成長は,基板の配列を維持しながら,表面の格子が散発構造に向かって進化する.
対照的に,ミカ上のカドミウム脂肪酸塩の薄膜と,無形の酸化シリコンのすべての薄膜は,無秩序なモノレイヤーを示し,散発構造は3層で現れる.

結論:

ミカ基板は,鉛とマンガンの脂肪酸塩の秩序ある単層形成と基板方向の成長を促進します.
サブストラットと塩の種類の選択は,Langmuir-Blodgettフィルムの構造的順序と進化に決定的な影響を及ぼします.
これらの発見は,ナノ構造の形成を制御する上で基板膜相互作用の重要性を強調しています.

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