物理化学学报 >> 2007, Vol. 23 >> Issue (06): 940 -944 .doi: 10.3866/PKU.WHXB20070629

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超快激光激发下银/氧化钛纳米颗粒膜的光氧化

付小锋; 邹化民; 韩俊波   

  1. 武汉大学物理科学与技术学院, 武汉 430072; 武汉大学电子显微镜中心, 武汉 430072; 武汉大学声光材料与器件教育部重点实验室, 武汉 430072

  • 收稿日期:2006-12-18 修回日期:2007-02-07 发布日期:2007-06-04
  • 通讯作者: 邹化民 E-mail:hmzou@whu.edu.cn

Photo Oxidation of Ag/Titanium Oxide Nanoparticle Film Induced by Ultrafast Laser

FU Xiao-Feng; ZOU Hua-Min; HAN Jun-Bo   

  1. Department of Physics, Wuhan University, Wuhan 430072, P. R. China; Center for Electron Microscopy, Wuhan University, Wuhan 430072, P. R. China; Key Laboratory of Acoustic and Photonic Materials and Devices, Ministry of Education, WuHan University, Wuhan 430072, P. R. China

  • Received:2006-12-18 Revised:2007-02-07 Published:2007-06-04
  • Contact: ZOU Hua-Min E-mail:hmzou@whu.edu.cn

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摘要：

通过射频磁控溅射方法制备了嵌入在无定型氧化钛基体中的Ag纳米颗粒膜, 研究了Ag纳米颗粒的大小、形状、吸收光谱及Ag的结合能在800 nm皮秒激光照射后的变化规律. 透射电子显微镜观察结果显示, 光照后Ag纳米颗粒尺寸减小, 形状变得更圆. 吸收光谱结果表明, 光照后样品在586-1200 nm 范围的吸收减小, 在350-586 nm范围的吸收增加. 光照后样品的光致发光强度大大增强, 这主要来自光氧化生成的Ag2O.

关键词: 光氧化, 光致发光, 纳米颗粒, 射频磁控溅射

Abstract:

The films with Ag nanoparticles embedded in amorphous titanium oxide were successfully prepared by radio frequency magnetron sputtering method. The changes in size, shape, absorption, and binding energy of Ag nanoparticles irradiated with picosecond laser of 800 nm were studied. TEM images showed that Ag nanoparticles became smaller in size and more roundish in shape after irradiation. The optical absorption spectra indicated that the absorption was reduced in the wavelength range from 586 nm to 1200 nm, and increased at the wavelength range from 350 nmto 586 nm. The photoluminescence intensity was greatly enhanced after the samples had been irradiated, which was attributed to the Ag2Oformed by photo oxidation.

Key words: Photo oxidation, Photoluminescence, Nanoparticle, Radio frequency magnetron sputtering

MSC2000: 

  • O644.15