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采用二维阵列椭球模型对镍金属的表面增强拉曼散射（SERS）机理进行分析,讨论了镍电极特别是具有有序纳米结构的镍电极在0.6～4.0eV的入射光子能量范围的SERS行为,并着重分析了纳米粒子的形状对其SERS 电磁增强因子的影响.计算表明,经过合适的表面粗糙后的镍电极能产生约102～104的增强因子.镍体系与典型的、具有强SERS活性的银金属相比,其SERS行为无明显的表面等离子体共振特性,避雷针效应在电磁场增强机理的贡献方面起着决定性作用.该理论分析与实验结果可较好地吻合,对制备和发展高SERS活性的过渡金属基底具有一定的指导意义.
The surface enhanced Raman scattering (SERS) mechanism of nickel metal was analyzed by two-dimensional array ellipsoidal model. The SERS behavior of nickel electrode, especially nickel electrode with ordered nanostructures, was discussed in the energy range of incident photons of 0.6-4.0eV , And the effect of nanoparticle shape on the electromagnetic enhancement factor of SERS is emphatically analyzed.The calculated results show that the nickel electrode with suitable surface roughening can produce an enhancement factor of about 102 to 104. The nickel system is similar to the typical SERS activity Compared with the silver metal, the SERS behavior has no significant surface plasmon resonance characteristics, and the lightning rod effect plays a decisive role in the contribution of the electromagnetic field enhancement mechanism. The theoretical analysis and the experimental results are in good agreement, and it is of great value for the preparation and development of high SERS Active transition metal substrate has a certain guiding significance.