高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (8): 1789.

• 研究论文 • 上一篇    下一篇

Cu2O/Ag纳米复合物的表面增强拉曼光谱

王蕴馨2, 宋薇1, 杨竞秀1, 徐蔚青1, 赵冰1   

  1. 1. 吉林大学超分子结构与材料国家重点实验室, 长春 130012;
    2. 吉林省疾病预防控制中心, 长春 130062
  • 收稿日期:2011-02-28 修回日期:2011-05-04 出版日期:2011-08-10 发布日期:2011-07-19
  • 通讯作者: 赵冰 E-mail:zhaobing@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20873050, 20921003, 20973074, 20903044, 21073072)资助.

Surface Enhanced Raman Scattering on Cu2O/Ag Composite

WANG Yun-Xin2, SONG Wei1, YANG Jing-Xiu1, XU Wei-Qing1, ZHAO Bing1*   

  1. 1. State Key Laboratory for Supramolecular Structure and Materials, Jilin University, Changchun 130012, China;
    2. Jilin Center for Disease Control and Prevention, Changchun 130062, China
  • Received:2011-02-28 Revised:2011-05-04 Online:2011-08-10 Published:2011-07-19
  • Contact: ZHAO Bing E-mail:zhaobing@jlu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20873050, 20921003, 20973074, 20903044, 21073072)资助.

摘要: 用一种简单的化学还原方法制备了银纳米粒子包覆的氧化亚铜(Cu2O)纳米复合物。扫描电子显微镜显示Cu2O 为八面体型的纳米粒子,表面光滑,结构对称。包覆的Ag部分占据Cu2O粒子表面。通过比较Ag/Cu2O纳米复合物、Ag溶胶及Cu纳米粒子表面吸附的4-巯基吡啶(4-Mpy)分子表面增强拉曼光谱(SERS)发现,利用此方法得到了Cu2O粒子表面吸附分子的拉曼光谱。银纳米粒子所产生的电磁场增强又增强了吸附在Cu2O上的4-Mpy拉曼信号。这种方法为初步研究Cu2O表面吸附分子性质提供了依据,扩宽了SERS的使用范围,使SERS应用在纳米半导体材料上成为可能。

关键词: 氧化亚铜, 银纳米粒子, 表面增强拉曼光谱

Abstract: Cu2O/Ag composite was prepared by using a very simple chemical reduction method. The SEM images indicated that Ag nanoparticles are deposited on the surface of octahedral Cu2O particles which were smooth and symmetrical. The surface of bare Cu2O particles is surrounded by large quantities of Ag nanoparticles, but is not form a compact shell. 4-Mpy molecules can be adsorbed not only on the surface of Ag nanoparticles, but also on the surface of Cu2O particles. The SERS enhancement on silver nanoparticles can be attributed to electromagnetic enhancement and chemical enhancement. On the other hand, Ag nanoparticles would also excite localized surface plasmon resaonace under the irradiation with suitable laser light, further enhancing the SERS signals of 4-MPy adsorbed on the near Cu2O particles. This method is exhibites some information on the catalatic properties of the surface of the octahedral Cu2O particles and provides a new kind of materials for SERS applications.

Key words: Cu2O, Ag nanoparticle, Surface-enhanced Raman scattering

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