摘要
采用激光刻蚀法在水溶液中制备了氧化铜纳米粒子，刻蚀完成后将氧化铜胶体沉积在铝片上形成一层氧化铜岛膜。所得纳米粒子的紫外一可见吸收峰在280nM处，表明所得为氧化铜。原子力显微镜观察表明所制得的纳米粒子具有椭圆状结构，长轴约为30～50NM，厚度约为8nm。扫描电镜图片显示氧化铜粒子沉积在铝基底后形成了大小在0．5扯m左右的叶片状的聚集体。以10^-5M的4-巯基吡啶（4MPY）为探针分子对氧化铜岛膜的表面增强拉曼散射（surfaceenhanced Raman scattering，SERS）进行了研究。结果证明，氧化铜岛膜具有良好的表面增强特性。对4MPY的SERS光谱进行了分析，推测出4MPY在本实验体系中主要以质子化的形式存在，通过S原子倾斜地吸附在氧化铜粒子表面。
Copper oxide nanoparticles were prepared by laser ablation in aqueous solution. UV/Vis spectrum of the sample showed a characteristic absorption peak at 280 nm, which indicated the as-prepared nanoparticles were copper oxide. Atomic force microscopy （AFM） revealed that copper oxide nanoparticles have an elliptical shape of major axis size 30--50 nm and of thickness - 8 nm. Scanning electron microscope （SEM） showed that leaf-shaped aggregates appeared after deposition of copper oxide nanoparticles on an aluminum foil. A good surface enhancement effect of these aggregates was confirmed by Raman measurement. The SERS spectral evidences indicated that 4-mercaptopyridine adsorbed onto the copper oxide surface via the S atom with the protonated pyridine N atom. The molecular plane assumes a tilted orientation with respect to the copper oxide surface.
出处
《光散射学报》
北大核心
2011年第2期120-124,共5页
The Journal of Light Scattering
基金
国家自然科学基金(10274019
10674041)
作者简介
郭浩（1976-），男，河南大学物理与电子学院讲师，日本综合研究大学院大学在读博士．主要研究方向为光生物物理E-mail：henuhaog@gmail．com
