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Sensors 2007, 7(5), 708-718;

Preparation of Silver Nanoparticle and Its Application to the Determination of ct-DNA

College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, P. R. China
Author to whom correspondence should be addressed.
Received: 16 March 2007 / Accepted: 29 May 2007 / Published: 31 May 2007
(This article belongs to the Special Issue Optical Biosensors)
View Full-Text   |   Download PDF [881 KB, uploaded 21 June 2014]


A new method to prepare silver nanoparticles was reported in this paper, whichbased on aqueous-gaseous phase reaction of silver nitrate solution and ammonia gas. Theproposed method is effective, rapid, and convenient. Transmission electron microscope(TEM) and X-ray diffraction (XRD) were used to characterize the structure of the particles,respectively. It was found that the average diameter of the particles was about 10 nm and theshape was spherical. And the strong fluorescence signal of the silver nanoparticles solutioncan be quenched after the adding of the calf thymus DNA (ct-DNA) solution. Thequenched fluorescence intensity was linear with the concentration of ct-DNA in the range of0.5 to 5.0 × 104 ng mL-1 with a detection limit of 0.3 ng mL-1. View Full-Text
Keywords: silver; nanoparticle; fluorescence; calf thymus DNA (ct-DNA) silver; nanoparticle; fluorescence; calf thymus DNA (ct-DNA)
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Liu, C.; Yang, X.; Yuan, H.; Zhou, Z.; Xiao, D. Preparation of Silver Nanoparticle and Its Application to the Determination of ct-DNA. Sensors 2007, 7, 708-718.

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