【摘要】 本文用三种光子能量的激光光源,对吸附于经电化学预处理的粗糙银电极表面的吡啶分子进行了SERS光谱的实验研究.绘出了SERS光谱谱线强度与入射光子能量和电极外加电位的关系.发现电极外加电位影响吸附分子的能级,并对SERS光谱的电荷迁移激发理论作了改进,从而可定性解释实验结果.更多还原

【Abstract】 By using laser excitation of three different photon energies, we have experimen tally studied the SERS spectra of pyridine molecules adsorbed on the surface of an electroohemically roughened silver electrode. The experiment shows the relation between SEES spectra intensity and the photon energy as well as the applied voltage. We introduce the viewpoint that the applied voltage has influence on the energy levels of adsorbed pyridine molecules and make improvement of the exising charge-transfer excitation theory of SEES spectra. The experimental results are explained in this way.更多还原