Improving surface-enhanced Raman scattering properties of TiO₂ nanoparticles by metal Co doping

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• 作者：Libin Yang ; Xiaoyu Qin ; Mengdi Gong ; Xin Jiang ; Ming Yang ; Xiuling Li ; Guangzhi Li
• 关键词：SERS ; TiO2 ; Metal doping ; Charge transfer
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：5 April, 2014
• 年：2014
• 卷：123
• 期：Complete
• 页码：224-229
• 全文大小：819 K

文摘

In this paper, pure and different amount Co ions doped TiO₂ nanoparticles were synthesized by a sol-hydrothermal method and were served as SERS-active substrate. The effect of metal Co doping on SERS properties of TiO₂ nanoparticles was mostly investigated. The results indicate that abundant metal doping energy levels can be formed in the energy gap of TiO₂ by an appropriate amount Co ions doping, which can promote the charge transfer from TiO₂ to molecule, and subsequently enhance SERS signal of adsorbed molecule on TiO₂ substrate, and improve remarkably SERS properties of TiO₂ nanoparticles.