CAJ | 학술논문

以一氧化碳为探针分子,研究了在金/硅基底上合理电沉积形成的铂纳米薄层的衰减全反射表面增强红外吸收效应. 与外反射红外吸收光谱测得的本体铂电极表面上一氧化碳最大吸收峰强相比,铂纳米薄层的红外吸收增强了约10倍;与文献上的有关薄膜的反常红外效应相比,其峰的强度相当,但方向上却无倒转或出现双极. 可应用于诸如甲醇电催化氧化的吸附中间体的灵敏检测. 铂纳米膜的红外吸收增强,可能与其本身表面等离子振荡的激发有关.
이일양화탄위탐침분자,연구료재금/규기저상합리전침적형성적박납미박층적쇠감전반사표면증강홍외흡수효응. 여외반사홍외흡수광보측득적본체박전겁표면상일양화탄최대흡수봉강상비,박납미박층적홍외흡수증강료약10배;여문헌상적유관박막적반상홍외효응상비,기봉적강도상당,단방향상각무도전혹출현쌍겁. 가응용우제여갑순전최화양화적흡부중간체적령민검측. 박납미막적홍외흡수증강,가능여기본신표면등리자진탕적격발유관.
Surface-enhanced infrared absorption spectra of CO have been obtained on Pt nano-layers properly electrodeposited onto a Au/Si substrate with the Kretschmann attenuate-total-reflection (ATR) configuration. The overall intensity in reflectance for the linearly adsorbed CO band is enhanced by a factor of around 10, compared to the corresponding theoretical maximum values for bulk metal surfaces with the external infrared reflection and absorption spectroscopy (IRAS). In comparison to the so-called abnormal infrared effects (AIREs) in the literature, the band intensity is comparable whereas the band direction is normal in the present study. Surface enhanced IR absorption effect of the above Pt nanolayer can be applied to characterize the intermediate species formed in methanol oxidation. The enhancement mechanism is briefly discussed based on surface plasmon oscillation excitable on the electrodeposited Pt surfaces.