SELF-ASSEMBLED MONOLAYERS OF FERROCENYLAZOBENZENES ON AU(111)/MICA FILMS - SURFACE-ENHANCED RAMAN-SCATTERING RESPONSE VS SURFACE-MORPHOLOGY
SELF-ASSEMBLED MONOLAYERS OF FERROCENYLAZOBENZENES ON AU(111)/MICA FILMS - SURFACE-ENHANCED RAMAN-SCATTERING RESPONSE VS SURFACE-MORPHOLOGY
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DOI：
10.1021/la00023a034
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发表时间：
1994-11-01
期刊：
影响因子：
3.9
通讯作者：
VANDUYNE, RP
中科院分区：
文献类型：
--
作者：
CALDWELL, WB;CHEN, KM;VANDUYNE, RP
报道了4-（4-巯基丁基）-4′-二茂铁偶苯化合物1在Au/云母和Pt/云母薄膜上自组装单层（SAMs）的表面增强拉曼散射（SERS）和表面增强共振拉曼散射（SERRS）结果。用原子力显微镜（AFM）对Au（粗）/云母和Au(111)/云母两种不同的Au/云母表面进行了表征，确定了它们各自的表面形态。Au（粗）/云母、Au(111)/云母上1的SAMs循环伏安法Pt/云母直接测量1。定量测定了吸附局域共振拉曼和基片衍生电磁增强效应对测量表面拉曼强度的贡献。令人惊讶的结论是，传统上用于制备和研究sam的类型的Au(111)/云母表面是“sers活性”的，而不需要额外的粗化或“sers活性”涂层处理。
Surface-enhanced Raman scattering (SERS) and surface-enhanced resonance Raman scattering(SERRS) results are reported for self-assembled monolayers (SAMs) of 4-(4-mercaptobutyl)-4'-ferrocenylazobenzene compound 1, on Au/mica and Pt/mica thin films. Two different Au/mica surfaces, designated Au(rough)/mica and Au(111)/mica, have been characterized by atomic force microscopy (AFM) to define their respective surface morphologies. Cyclic voltammetry of SAMs of 1 on Au(rough)/mica, Au(111)/mica; and Pt/mica was used to directly measure the surface coverage of 1. A quantitative determination of the contributions to the measured surface Raman intensity from adsorbate-localized resonance Raman and substrate-derived electromagnetic enhancement effects is made. The surprising conclusion is that Au(111)/mica surfaces of the type traditionally used for preparing and studying SAMs are ''SERS-active'' without the need for additional roughening or treatment with a ''SERS-active'' overlayer.