2009
DOI: 10.1088/0957-4484/21/2/025501
|View full text |Cite
|
Sign up to set email alerts
|

L-cysteine functionalized gold nanoparticles for the colorimetric detection of Hg2+induced by ultraviolet light

Abstract: A simple, cost-effective yet rapid and sensitive colorimetric sensor for the detection of Hg(2+) using L-cysteine functionalized gold nanoparticles induced by ultraviolet radiation was developed. The sensitivity and selectivity of detection was also investigated. The L-cysteine modified gold nanoparticles can be induced to aggregate quickly in the presence of Hg(2+), especially with the assistance of ultraviolet radiation. The presence of Hg(2+) can be monitored by the colorimetric response of gold nanoparticl… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

2
79
0

Year Published

2011
2011
2016
2016

Publication Types

Select...
8
1
1

Relationship

0
10

Authors

Journals

citations
Cited by 162 publications
(81 citation statements)
references
References 31 publications
2
79
0
Order By: Relevance
“…This can be attributed to the formation of amalgam like structure due to the strong binding of mercury to the silver surface. It is well known that metal ions are expected to bind the amino acid molecules through cooperative metal-ligand interactions [38]. When Hg 2+ was added to the AgNPs solution, thiophillic Hg 2+ would result in partial exchange of L-cysteine ligand from silver to mercury leaving patches of exposed surface of silver (Fig.…”
Section: Accepted Manuscriptmentioning
confidence: 99%
“…This can be attributed to the formation of amalgam like structure due to the strong binding of mercury to the silver surface. It is well known that metal ions are expected to bind the amino acid molecules through cooperative metal-ligand interactions [38]. When Hg 2+ was added to the AgNPs solution, thiophillic Hg 2+ would result in partial exchange of L-cysteine ligand from silver to mercury leaving patches of exposed surface of silver (Fig.…”
Section: Accepted Manuscriptmentioning
confidence: 99%
“…Other small charged molecules that have been largely used to stabilize gold nanoparticles in water are organic thiols containing one or multiple charged groups, such as mercaptopropionic acid [54] , thioglycolic acid [55] , mercaptosuccinic acid [56] , cysteine [57,58] , penicillamine [59] , N-acetyl-DLpenicillamine [59] , etc. These molecules bind covalently with the gold surface, forming a strong gold-sulfur bond while the charged groups lead to formation of an electric double layer that provides colloidal stability.…”
Section: Small Charged Moleculesmentioning
confidence: 99%
“…Thus, the conditions of the trial analytical model described above are consistent with the concentration level suggested by EPA (US Environmental Protection Agency). The performance of the proposed method was also compared with others for the analysis of Hg 2+ (Chai et al, 2010;Paramanik et al, 2013;Zhou et al, 2012;Xu et al, 2011), and it was found that both the obtained high sensitivity and linearity compared well with the other methods (Table 1). Thus, a novel sensor for quantitative analysis of 6-MP and Hg 2+ has been successfully constructed.…”
Section: Performance Of the Novel Methods For The Analysis Of 6-mp Andmentioning
confidence: 95%