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SURFACE CAPPING OF TiO2 COLLOIDAL NANOPARTICLES STUDIED BY FOURIER TRANSFORM RAMAN SPECTRA |
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| Authors: | Deng Hui-hu Wang Xin Yu Tsing Mao Hai-fang Suzuki Toshishige and Lu Zu-hong |
| Institution: | Chien-Shiung WU Laboratory, Southeast University, Nanjing 210096, China; Chien-Shiung WU Laboratory, Southeast University, Nanjing 210096, China; Tohoku National Industrial Institute, Agency of Industrial Science and Technology, MITI, Sendai 983-8551, Japan; Institute of Chemistry & Chemical-Engineering Intermediate Chemistry Laboratory, Nanjing University, Nanjing 210093, China; Shanghai Institute of Organic Chemistry, The Chinese Academy of Sciences, Shanghai 200032, China; (5)Toh |
| Abstract: | Surface capping of TiO2 colloid nanoparticles with tetrasulfonated gallium phthalocyanine chloride (GaTsPc) was studied by Fourier Transform (FT) Raman spectra. A striking FT-Raman signal enhancement of GaTsPc is observed, indicating that a surface complex is formed during surface capping of GaTsPc dye molecules on TiO2 colloid via sulfonate groups. This effect is attributed to a strong Raman resonance with the charge transfer transition in the surface complex. Surface complexation also have considerable influences on the FT-Raman signals for TiO2 nanoparticles. |
| Keywords: | surface modification enhancement effect colloidal nanoparticle fourier transform raman spectra |
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