کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
178806 | 459320 | 2015 | 5 صفحه PDF | دانلود رایگان |

• Label-free electrochemical biosensor for Cu(II) and ascorbic acid
• DNAzyme-based molecular switch as biosensing mechanism
• Gold patterned with mesoporous silica thin films for the DNAzyme-controlled diffusion of Fe(CN)63 −/4 −
A novel electroanalytical strategy for copper and ascorbic acid detection was developed by using a nanostructured electrode surface mechanized with a DNAzyme-based molecular gate. This sensing interface was constructed by first electrodeposition of a mesoporous silica thin film on Au electrodes and further assembly of a Cu(II)-specific DNAzyme. The biosensing assay was based on the Cu(II) and ascorbic acid responsible activation of the DNAzyme, which acted as a molecular switch able to control the diffusion of the Fe(CN)63 −/4 − electrochemical probe through the nanochannels of the mesoporous film.
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Journal: Electrochemistry Communications - Volume 58, September 2015, Pages 57–61