Ji Nan, Ruan Weidong, Wang Chunxu, Lu Zhicheng, Zhao Bing
State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, People's Republic of China.
Langmuir. 2009 Oct 6;25(19):11869-73. doi: 10.1021/la901521j.
In this paper, a simple method to fabricate a three-dimensional (3D) nanostructure decorated with Ag nanoparticles for surface-enhanced Raman scattering (SERS) is demonstrated. Highly ordered porous anodic aluminum oxide (AAO) templates were employed to construct these compound nanostructures. First, the AAO templates were fabricated using a two-step anodization approach. Second, an alternating current (AC) electrochemical deposition was used to fill AAO templates with Ag nanoparticles. Taking 4-mercaptopyridine (4-MPy) as the probing molecule, high-quality SERS spectra were observed. The UV-vis mirror reflection spectra were measured to investigate the surface plasma resonance (SPR) absorbance. An interesting phenomenon of SPR-affected thin film interference was observed. SERS mapping was performed to characterize the homogeneity of as-prepared substrates. Good homogeneity and stability make these substrates good candidates for SERS spectroscopy.
本文展示了一种制备用于表面增强拉曼散射（SERS）的、装饰有银纳米颗粒的三维（3D）纳米结构的简单方法。采用高度有序的多孔阳极氧化铝（AAO）模板来构建这些复合纳米结构。首先，使用两步阳极氧化法制备AAO模板。其次，采用交流电（AC）电化学沉积法用银纳米颗粒填充AAO模板。以4-巯基吡啶（4-MPy）作为探测分子，观察到了高质量的SERS光谱。测量紫外-可见镜面反射光谱以研究表面等离子体共振（SPR）吸光度。观察到了SPR影响薄膜干涉的有趣现象。进行SERS映射以表征所制备基底的均匀性。良好的均匀性和稳定性使这些基底成为SERS光谱的良好候选者。
