Citation: Yu Zhang, Shang Wen Yan Gong, Lu Jin, Shuang Man Li, Zhong Ping Chen, Ming Ma, Ning Gu. Magnetic nanocomposites of Fe₃O₄/SiO₂-FITC with pH-dependent fluorescence emission[J]. Chinese Chemical Letters, ;2009, 20(8): 969-972. doi: 10.1016/j.cclet.2009.03.038 shu

Magnetic nanocomposites of Fe₃O₄/SiO₂-FITC with pH-dependent fluorescence emission

Yu Zhang ^a,b, ,
Shang Wen Yan Gong ^a,b ,
Lu Jin ^a,b ,
Shuang Man Li ^b ,
Zhong Ping Chen ^a,b ,
Ming Ma ^a,b ,
Ning Gu ^a,b

a State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China;
b Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, China

Received Date: 1 September 2008

Fund Project: This work is supported by the National Natural Science Foundation of China (Nos. 60571031, 60501009, 30870679) and the National Basic Research Program of China (Nos. 2006CB933206, 2006CB705606). Open Project Foundation of Laboratory of Solid State Microstructures of Nanjing University and the program for New Century Excellent Talents in University, the Chinese Ministry of Education, are greatly appreciated.

This paper describes the formation of magnetic and fluorescent nanocomposite particles which consist of superparamagneticFe₃O₄core, SiO₂ shell and organic dye (FITC) coating layer on their surface. The obtained nanocomposites possess typical superparamagnetism and exhibit clear green fluorescence image. And their fluorescence emission is pH-dependent, which would be applied to pH sensing.
- Nanocomposites,
- Core-shell structure,
- Magnetic nanoparticles,
- Fluorescence
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