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用氢气还原氧化银的方法合成了粒径约为100nm的银纳米粒子,然后在表面经PVP修饰的载玻片上以自组装的方式构筑了银纳米粒子单层和双层二维有序阵列,在铝基底上通过对氨基苯甲酸成功构筑了银纳米粒子的有序组装体,用扫描电镜进行了表征;对不同基底二维有序阵列的表面增强拉曼光谱进行了研究,结果表明,对氨基苯甲酸在银和铝基基底上都是垂直吸附,其表面拉曼增强效应是电磁场增强占主导地位,但同时也有化学增强的贡献。
Silver nanoparticles with a diameter of about 100nm were synthesized by reduction of silver oxide with hydrogen. Then, two-dimensional ordered array of silver nano-particles and self-assembled silver nanoparticles were constructed on the PVP-modified glass slides. The ordered assembly of silver nanoparticles was successfully constructed on aluminum substrate by using p-aminobenzoic acid and characterized by scanning electron microscopy. The surface enhanced Raman spectra of two-dimensional array with different substrates were studied. The results showed that Aminobenzoic acid is vertically adsorbed on both silver and aluminum substrates and its surface Raman enhancement effect is dominated by the enhancement of the electromagnetic field, but it also has a chemical enhancement contribution.