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首页> 外文期刊>Journal of Applied Polymer Science >Surface-Enhanced Infrared Absorption (SEIRA) and Its Use in Analysis of Plasma-Modified Surface
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Surface-Enhanced Infrared Absorption (SEIRA) and Its Use in Analysis of Plasma-Modified Surface

机译：表面增强红外吸收（SEIRA）及其在等离子体改性表面分析中的应用

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摘要

A thin film (<10 nm) of the metal clusters (silver or gold) with an island form was deposited on a CaF_2 salt plate by slow vacuum thermal evaporation. Molecular layers of stearic acid, p-nitrobenzoic acid, and m-nitrbenzoic aicd(p- and m-NBA) were prepared on the thin metal film. The system was then examined by infrared spectroscopy attenuated total reflection (IR-ATR). It was found that through the interaction betwen the metal islands film and the electric field of the incident IR beam the infrared absorption of the molecule layers adsorbed on the islands was enhanced by a factor of 17. The surface-enhanced IR absorption (SEIRA) also presents a selection rule. This method was then used to study the surface modification with O_2 and NH_3 plasma and the plasma polymerization of allylamine. This is the first time that SEIRA has been sued in plasma investigations. A model is provided to explain the interactions between the metal islands film and the electric field of the incident IR beam in the SEIRA. The in-plasma-built functional groups can be further used to graft biofunctional molecules for the biomedical industry.
机译：通过缓慢的真空热蒸发将具有岛状的金属簇（银或金）的薄膜（<10 nm）沉积在CaF_2盐板上。在金属薄膜上制备了硬脂酸，对硝基苯甲酸和间硝基苯甲酸aicd（p-和m-NBA）的分子层。然后通过红外光谱衰减全反射（IR-ATR）检查该系统。发现通过金属岛膜和入射红外光束的电场之间的相互作用，吸附在岛上的分子层的红外吸收提高了17倍。表面增强的IR吸收（SEIRA）也提出选择规则。然后将该方法用于研究O_2和NH_3等离子体的表面改性以及烯丙胺的等离子体聚合。这是SEIRA在血浆研究中首次被起诉。提供了一个模型来解释金属岛膜和SEIRA中入射IR光束电场之间的相互作用。血浆内构建的官能团可进一步用于嫁接生物医学行业的生物功能分子。

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