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吸附能量,生长模式,以及Ca在有或没有电子损伤的聚甲酸表面上的粘附概率

Junfa Zhu¹, Paul Goetsch, Nancy Ruzycki

¹Department of Chemistry, University of Washington, Seattle, WA 98195-1700, USA.

Journal of the American Chemical Society

|May 1, 2007

概括

(Ca) 原子强烈地与原始的聚甲基酸 (PMMA) 基团结在一起,形成地下碳酸盐. 电子辐射改变了Ca吸附,促进了3D集群在地下结合的增长.

科学领域:

材料科学材料科学材料科学
表面科学是一门学科.
物理化学物理化学

背景情况:

聚甲基酸 (PMMA) 是一种广泛使用的聚合物,具有功能组.
了解聚合物表面上的金属原子吸附对于开发先进材料和涂料至关重要.

研究的目的:

为了研究 (Ca) 原子在原始和电子辐射PMMA表面的吸附行为.
阐明在PMMA上Ca的相互作用机制,结合能量和结构演变.

主要方法:

吸附微热度测量是一种吸附微热度测量.
原子束/表面散射的作用
低能量的+离子散射光谱 (ISS)

主要成果:

在原始的PMMA上,Ca最初通过与地下基团结,以高能量 (730-780kJ/mol) 吸附,形成Ca碳酸盐.
在0.5毫升以上,Ca在表面形成3D集群;地下结合涉及4-6个层.
电子辐射增加了Ca粘附的概率,但减少了吸附能量,有利于由于表面缺陷造成的3D岛屿生长.

结论:

碳酸与PMMA基形成强化学键,导致地下复合.
电子辐射改变PMMA表面特性,改变Ca吸附路径并促进3D生长.
该研究提供了有关表面修饰和薄膜沉积的金属聚合物相互作用的见解.

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