کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
867603 | 1470992 | 2011 | 7 صفحه PDF | دانلود رایگان |
In this article, gold nanostructure modified electrodes were achieved by a simple one-step electrodeposition method. The morphologies of modified electrodes could be easily controlled by changing the pH of HAuCl4 solution. The novel nanoflower-like particles with the nanoplates as the building blocks could be interestingly obtained at pH 5.0. The gold nanoflower modified electrodes were then used for the fabrication of electrochemical DNA biosensor. The DNA biosensor fabrication process was characterized by cyclic voltammetry and electrochemical impedance spectroscopy with the use of ferricyanide as an electrochemical redox indicator. The DNA immobilization and hybridization on gold nanoflower modified electrode was studied with the use of [Ru(NH3)6]3+ as a hybridization indicator. The electrochemical DNA biosensor shows a good selectivity and sensitivity toward the detection of target DNA. A detection limit of 1 pM toward target DNA could be obtained.
Journal: Biosensors and Bioelectronics - Volume 30, Issue 1, 15 December 2011, Pages 151–157