Issue 22, 2015

Detection of thiocyanate through limiting growth of AuNPs with C-dots acting as reductant

Abstract

We have found that hydroxyl-rich carbon dots (C-dots) have the ability to reduce Au3+ to form gold nanoparticles (AuNPs). Thiocyanate (SCN) can be absorbed on the surface of the AuNPs due to its high affinity toward the AuNPs, which inhibits the growth of the AuNPs. Meanwhile, SCN has the ability to etch the as-synthesized big AuNPs to small AuNPs, which can also cause the absorption peak of the AuNPs to decrease. Therefore, an optical sensor is developed for the detection of SCN based on measuring the plasmon resonance absorption peak change of the AuNPs. Under optimal conditions, this method yields excellent sensitivity (the limit of detection is 0.16 μM) and selectivity toward SCN. This method can detect SCN in raw milk with satisfactory results. This work gives new insight into monitoring the quality of milk.

Graphical abstract: Detection of thiocyanate through limiting growth of AuNPs with C-dots acting as reductant

Supplementary files

Article information

Article type
Paper
Submitted
06 Aug 2015
Accepted
16 Sep 2015
First published
18 Sep 2015

Analyst, 2015,140, 7645-7649

Author version available

Detection of thiocyanate through limiting growth of AuNPs with C-dots acting as reductant

Q. Lu, Y. Liu, Y. Hou, H. Wang, Y. Zhang and S. Yao, Analyst, 2015, 140, 7645 DOI: 10.1039/C5AN01605C

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