珊瑚状Pt岛膜在纳米银电极上的诱导表面增强
Induced surface enhancement in coral Pt island films attached to nanostructured Ag electrodes
摘要：
珊瑚状铂岛膜是通过电化学还原沉积在二氧化硅涂层的纳米结构银电极上。从这些设备的表面增强（共振）拉曼[SE（R）R]信号的分子专门连接到Pt的强度高达50%的确定为银。SE（R）R光谱研究进行了不同的探针分子，二氧化硅涂层厚度和激发线。此外，对Ag-SiO2-Pt载体几何形状进行了场增强计算，以阐明Pt岛膜纳米结构对所观察到的拉曼强度的影响。结果表明，Pt岛膜的非完美包覆促进了Pt SER活性的诱导效率。与Ag-SiO2-Au电极上的类似测量的比较进一步表明，沉积的金属岛膜的化学性质对SE（R）R强度起次要作用。
英文摘要：
Coral Pt islands films are deposited via electrochemical reduction on silica coated nanostructured Ag electrodes. From these devices surface enhanced (resonance) Raman [SE(R)R] signals of molecules exclusively attached to Pt are obtained with intensities up to 50% of the value determined for Ag. SE(R)R spectroscopic investigations are carried out with different probe molecules, silica coating thicknesses and excitation lines. Additionally, field enhancement calculations on Ag-SiO2-Pt support geometries are performed to elucidate the influence of the Pt island film nanostructure on the observed Raman intensities. It is concluded that the non perfect coating of the Pt island film promotes the efficiency of the induced Pt SER activity. Comparison with similar measurements on Ag-SiO2-Au electrodes further suggests that the chemical nature of the deposited metal island film plays a minor role for the SE(R)R intensity.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
