Issue 20, 2024

A label-free photoelectrochemical biosensor for silver ions based on Zn–Co doped C and CdS QD nanomaterials

Abstract

A sensitive photoelectrochemical (PEC) biosensor for silver ions (Ag+) was developed based on Zn–Co doped C and CdS quantum dot (CdS QD) nanomaterials. Hydrophobic modified sodium alginate (HMA), which could stabilize and improve the PEC performance of CdS QDs, was also used for the construction of PEC sensors. Especially, Zn–Co doped C, CdS QDs and HMA were sequentially modified onto an electrode surface via the drop-coating method, and a C base rich DNA strand was then immobilized onto the modified electrode. As the C base in DNA specifically recognized Ag+, it formed a C–Ag+–C complex in the presence of Ag+, which created a spatial steric hindrance, resulting in a reduced PEC response. The sensing platform is sensitive to Ag+ in the range of 10.0 fM to 0.10 μM, with a limit of detection of 3.99 fM. This work offers an ideal platform to determine trace heavy metal ions in environmental monitoring and bioanalysis.

Graphical abstract: A label-free photoelectrochemical biosensor for silver ions based on Zn–Co doped C and CdS QD nanomaterials

Supplementary files

Article information

Article type
Paper
Submitted
27 မတ် 2024
Accepted
24 ဧပြီ 2024
First published
25 ဧပြီ 2024

Anal. Methods, 2024,16, 3202-3208

A label-free photoelectrochemical biosensor for silver ions based on Zn–Co doped C and CdS QD nanomaterials

L. Zhang, K. Wang, F. Zhou, Y. Bu, X. Yang and G. Nie, Anal. Methods, 2024, 16, 3202 DOI: 10.1039/D4AY00547C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements