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氧化铜纳米粒子的制备及其SERS特性

Synthesis of Copper Oxide Nanoparticles and Their Surface-Enhanced Raman Scattering Properties

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【作者】 郭浩丁丽莫育俊

【Author】 GUO Hao1,3,DING Li2,MO Yu-jun1(1.School of Physics and Electronics,Henan University,Kaifeng 475004,China;2.Automation Engineering Department,Yellow River Conservancy Technical Institute,Kaifeng 475003,China;3.Institute for Molecular Science,The Graduate University for Advanced Studies(Sokendai),Okazaki 444-8585,Japan,China)

【机构】 河南大学物理与电子学院日本综合研究大学院大学分子科学研究所黄河水利职业技术学院自动化工程系

【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—可见吸收峰在280 nm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30~50 nm,厚度约为8 nm。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0.5μm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(surface-enhanced 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。

【Abstract】 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.

【基金】 国家自然科学基金(10274019,10674041)
  • 【文献出处】 光散射学报 ,The Journal of Light Scattering , 编辑部邮箱 ,2011年02期
  • 【分类号】O657.37
  • 【被引频次】5
  • 【下载频次】690
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