SURFACE CAPPING OF TiO2 COLLOIDAL NANOPARTICLES STUDIED BY FOURIER TRANSFORM RAMAN SPECTRA

Abstract

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

Received: 01 January 2001
Accepted manuscript online:

PACS:	7380
	6146
	7320

Fund: Project supported by the Senior Visiting Scholarship Foundation of Key Laboratory in Advanced University of Ministry of Education, China and partly by the National Natural Science Foundation of China under Grant Nos. 61525102 and 69371032).

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Wang Xin (邓慧华), Lu Zu-hong (汪昕), Deng Hui-hua (郁清), Yu Tsing (毛海舫), Mao Hai-fang (铃木敏重), Suzuki Toshishige (陆祖宏) SURFACE CAPPING OF TiO₂ COLLOIDAL NANOPARTICLES STUDIED BY FOURIER TRANSFORM RAMAN SPECTRA 2001 Chinese Physics 10 59

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SURFACE CAPPING OF TiO2 COLLOIDAL NANOPARTICLES STUDIED BY FOURIER TRANSFORM RAMAN SPECTRA

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SURFACE CAPPING OF TiO₂ COLLOIDAL NANOPARTICLES STUDIED BY FOURIER TRANSFORM RAMAN SPECTRA