Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 141, Issue 1, Pages 244-248Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.04.063
Keywords
Chitosan; Ru(bPY)(3)(2+) doped silica nanoparticles; Selective immobilization; ECL
Funding
- National Nature Science Foundation of China [20675031]
- Shanghai Science and Technology Committee [051409007, 06PJ14032]
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An effective method for selective immobilization of tris(2,2'-bipyridyl)ruthenium(II) (Ru(bPY)(3)(2+)) onto one target electrode surface based on the electrodeposition of RuDS NPs (Ru(bpy)(3)(2+) doped silica nanoparticles)/chitosan composite Him is presented in this paper. Ru(bPY)(3)(2+) was selectively deposited onto four individual electrodes in an Au electrode array. The results demonstrate the possibility of selective immobilization of Ru(bPY)32+ onto array electrodes and selective immobilization of different ECL composite. Therefore have potential applications in bioanalysis, capillary electrophoresis and drug screening. RuDS NPs and the resulting composite film were characterized by UV-vis spectroscopy, transmission electron microscopy (TEM) and Field emission-scanning electron microscope (FE-SEM). The electro-chemiluminescence (ECL) sensor based on the composite film modified electrode exhibited excellent reproducibility, stability and sensitivity for the detection of tri-n-propylamine (TPA). The linear range was from 1 x 10(-10) to 1 x 10(-6) M (R-2 =0.9954) with the detection limit of 5 x 10(-11) M. (C) 2009 Elsevier B.V. All rights reserved.
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