Highly Selective Colorimetric Assay of Cu2+ Ions by Silver Nanoparticles Conjugated with 1-(2-mercaptoethyl)-1,3,5-Triazinane-2,4,6-Trione

Title
Highly Selective Colorimetric Assay of Cu2+ Ions by Silver Nanoparticles Conjugated with 1-(2-mercaptoethyl)-1,3,5-Triazinane-2,4,6-Trione
Authors
이강봉이연희남윤식윤수진노권철
Keywords
Cu2+ Ion; Silver Nanoparticles; Colorimetric Nanoparticle Sensor; Sensitive, Selective Assay Method
Issue Date
2017-11
Publisher
Journal of nanoscience and nanotechnology
Citation
VOL 17-8493
Abstract
A simple and sensitive colorimetric assay method for the determination of Cu2+ ions in aqueous samples was developed using silver nanoparticles functionalized with 1-(2-mercaptoethyl)-1,3,5-triazinane-2,4,6-trione (MTT-AgNPs). The Cu2+ ion appears to play the role of the metal center of the coordination complex, which can form N– Cu2+– O coordination bonds with the MTT-AgNPs, shorten their interparticle distance, and induce aggregation of the MTT-AgNPs. The binding site and sensing mechanism of Cu2+ to MTT-AgNPs were characterized by XPS and FT-IR spectroscopy. This aggregation results in a dramatic color change from yellow to dark red. Therefore, the concentration of Cu2+ ions in environmental samples can be quantitatively detected by the naked eye or by UV-Vis spectrometry when using the MTT-AgNP sensor. The sensitivity of the detection is significantly improved by modulating the solution to pH 9, leading to a more rapid color change in the optimized AgNP system. The absorption ratios (A555/A395 of the modified AgNP solution exhibited a linear correlation with the Cu2+ ion concentrations, with a limit of detection of 15.2 nM. This cost-effective detection system allows for the rapid and facile determination of the concentration of Cu2+ ions in aqueous samples.
URI
http://pubs.kist.re.kr/handle/201004/66055
ISSN
1533-4880
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE