高等学校化学学报

高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (3): 523.

• 研究论文 • 上一篇    下一篇

激光诱导沉积银膜制备新型光纤SERS传感器

贾少杰,徐抒平,郑先亮,赵冰,徐蔚青   

  1. 吉林大学超分子结构与材料教育部重点实验室,长春 130012
  • 收稿日期:2005-04-05 出版日期:2006-03-10 发布日期:2006-03-10
  • 通讯作者: 徐蔚青(1957年出生),男,博士,教授,博士生导师,主要从事纳米材料及分子组装体光谱学研究. E-mail: wqxu@mail.jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号：20375014,20273022和20473029)资助.

Preparation of SERS Optical Fiber Sensor via Laser-induced Deposition of Ag Film on the Surface of Fiber Tip

JIA Shao-Jie,XU Shu-Ping,ZHENG Xian-Liang,ZHAO Bing,XU Wei-Qing*   

  1. Key Labroratory for Superamoleular Structure and Materials of Ministry of Education,
    Jilin University,Changchun 130012,China
  • Received:2005-04-05 Online:2006-03-10 Published:2006-03-10

PDF (PC)

被引次数

50

摘要：

利用激光诱导沉积的方法直接在光纤端面沉积了银纳米膜,并用SERS光谱监测了这一沉积过程,在光纤端面上生成的银膜出现了“年轮”状宏观形貌,这种形貌与激光在光纤中的干涉与衍射条纹分布相一致,证明了这种现象是由激光诱导反应引发的. 结合实验结果进一步讨论了银纳米膜的形成机理. 在光纤上沉积的银纳米膜作为光纤SERS传感器的基底与其它制备基底的方法比较也具有实验操作简便,耗时短,重现性好,SERS增强效果强等诸多优点,是一种非常好的制备光纤SERS传感器基底的方法. 

关键词: 激光诱导; 银沉积; 表面增强拉曼散射; 光纤探针

Abstract:

A novel method of modifying the probe of SERS-optical sensor is described. By using laser-induced deposition and growth of Ag nanoparticles,we prepared a new type of Ag-deposited film with the appearance of annual rings on the fiber tip. A 6 cm-long silica fiber is immersed in the mixture of AgNO3 and citrate. A 514.5 nm laser with the power of 4.2 mW is used to reduce the Ag(Ⅰ) to Ag(0) and induced Ag(0) to deposit onto the fiber tip. SERS spectra of a probe molecule(BPENB) are used to monitor the deposition process. The optical and AFM images display the macro- and micro-appearance of Ag-deposited film. These results show that the laser-induced deposition is a simple and rapid method for modifying the probe of SERS-optical sensor. The Ag film with the proper thickness and roughness is prepared within only about 4.5 min. Moreover,the Ag deposition film prepared by this method shows not only easy reproduction but also remarkable SERS activity. The mechanism of the laser-induced Ag deposition onto the fiber tip was also discussed.

Key words: Laser induction; Ag deposition; SERS; Optic fiber probe

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