scholarly journals Selective and colorimetric detection of Ba2+ ions in aqueous solutions using 11-mercaptoundecylphosphonic acid functionalized gold nanoparticles

RSC Advances ◽  
2017 ◽  
Vol 7 (50) ◽  
pp. 31611-31618 ◽  
Author(s):  
Blanca A. García Grajeda ◽  
Samuel G. Soto Acosta ◽  
Sergio A. Aguila ◽  
Héctor Peinado Guevara ◽  
Marta E. Díaz-García ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Aqueous Solutions ◽  
Colorimetric Detection ◽  
Colorimetric Method ◽  
Selective Detection ◽  
Functionalized Gold Nanoparticles

In this paper we describe a simple colorimetric method for the sensitive and selective detection of Ba2+ ions, using 11-mercaptoundecylphosphonic acid functionalized gold nanoparticles (AuNPs–MPA) in aqueous solution.

Sensitive and selective detection of mercury ions based on papain and 2,6-pyridinedicarboxylic acid functionalized gold nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 3259-3266 ◽  
Author(s):  
Cui Lai ◽  
Lei Qin ◽  
Guangming Zeng ◽  
Yunguo Liu ◽  
Danlian Huang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Rational Design ◽  
Colorimetric Method ◽  
Mercury Ion ◽  
Selective Detection ◽  
Mercury Ions ◽  
Functionalized Gold Nanoparticles ◽  
Pyridinedicarboxylic Acid

Here we demonstrate the rational design of a sensitive and selective colorimetric method for mercury ion (Hg2+) detection by using papain and 2,6-pyridinedicarboxylic acid (PDCA) functionalized gold nanoparticles (AuNPs).

Selective detection of nanomolar Cr(vi) in aqueous solution based on 1,4-dithiothreitol functionalized gold nanoparticles

2011 ◽  
Vol 3 (2) ◽  
pp. 343-347 ◽  
Author(s):  
Feng Tan ◽  
Xue Liu ◽  
Xie Quan ◽  
Jingwen Chen ◽  
Xiaona Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Selective Detection ◽  
Functionalized Gold Nanoparticles

Fast Colorimetric Detection of Copper Ions Using L-Cysteine Functionalized Gold Nanoparticles

2007 ◽  
Vol 7 (2) ◽  
pp. 712-716 ◽  
Author(s):  
Wenrong Yang ◽  
J. Justin Gooding ◽  
Zhicong He ◽  
Qiong Li ◽  
Guonan Chen
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Visual Detection ◽  
Detection Method ◽  
Copper Ions ◽  
Colorimetric Detection ◽  
Sandwich Complex ◽  
Functionalized Gold Nanoparticles

This communication reports an efficient visual detection method of Cu2+ by L-cysteine functionalized gold nanoparticles in aqueous solution. Upon exposure to Cu2+, the gold nanoparticle solution changed from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. This colorimetric sensor allows a rapid quantitative assay of Cu2+ down to the concentration range of 10−5 M. Recognition of Cu2+ and formation of the aggregates are proposed to occur via a 2 : 1 sandwich complex between L-cysteine and Cu2+.

Colorimetric detection of cysteine based on dispersion–aggregation mechanism of chitosan stabilized gold nanoparticles

2019 ◽  
Vol 97 (3) ◽  
pp. 233-237 ◽  
Author(s):  
Esther Jeyasekaran ◽  
Sridevi Venkatachalam
Keyword(s):  
Gold Nanoparticles ◽  
High Selectivity ◽  
Limit Of Detection ◽  
Colorimetric Detection ◽  
Colorimetric Method ◽  
Colour Change ◽  
Selective Detection ◽  
Aggregation Mechanism ◽  
Plausible Mechanism ◽  
Sulfur Containing

A simple and selective colorimetric method for detection of cysteine using chitosan stabilized gold nanoparticles has been developed. L-cysteine is a sulfur containing amino acid. Cysteine binds with the gold nanoparticles through a sulfur group and induces aggregation of the nanoparticles, which leads to a visible colour change from pale red to blue. A good linearity was observed from 0.1 to 30 μmol/L (R = 0.9958) cysteine, and the limit of detection was found to be 0.1 μmol/L. The gold nanoparticles showed a high selectivity towards the detection of cysteine even in the presence of 10 000 fold higher concentration of common interferences such as glutathione, methionine, and homocysteine. A plausible mechanism for the selective detection of cysteine in presence of interferences based on a dispersion–aggregation mechanism has been proposed.

Fast Colorimetric Detection of Copper Ions Using L-Cysteine Functionalized Gold Nanoparticles

2007 ◽  
Vol 7 (2) ◽  
pp. 712-716 ◽  
Author(s):  
Wenrong Yang ◽  
J. Justin Gooding ◽  
Zhicong He ◽  
Qiong Li ◽  
Guonan Chen
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Visual Detection ◽  
Detection Method ◽  
Copper Ions ◽  
Colorimetric Detection ◽  
Sandwich Complex ◽  
Functionalized Gold Nanoparticles

This communication reports an efficient visual detection method of Cu2+ by L-cysteine functionalized gold nanoparticles in aqueous solution. Upon exposure to Cu2+, the gold nanoparticle solution changed from red to blue, in response to surface plasmon absorption of dispersed and aggregated nanoparticles. This colorimetric sensor allows a rapid quantitative assay of Cu2+ down to the concentration range of 10−5 M. Recognition of Cu2+ and formation of the aggregates are proposed to occur via a 2 : 1 sandwich complex between L-cysteine and Cu2+.

Colorimetric detection of influenza A virus using antibody-functionalized gold nanoparticles

The Analyst ◽  
2015 ◽  
Vol 140 (12) ◽  
pp. 3989-3995 ◽  
Author(s):  
Yuanjian Liu ◽  
Linqun Zhang ◽  
Wei Wei ◽  
Hongyu Zhao ◽  
Zhenxian Zhou ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Influenza A Virus ◽  
Clinical Diagnosis ◽  
Specific Antibody ◽  
Influenza A ◽  
Colorimetric Detection ◽  
Viral Pathogen ◽  
Virus Surface ◽  
Functionalized Gold Nanoparticles

A colorimetric immunosensor for IAV based on AuNPs modified with mAb is developed. This assay depends on an ordered AuNPs structure covering the virus surface and can be applied to any viral pathogen by incorporating the appropriate pathogen-specific antibody, giving the proposed method a broad prospect in clinical diagnosis applications.

Rapid colorimetric detection of arsenic (III) by glutathione functionalized gold nanoparticles based on RGB extracting system

2021 ◽  
Vol 133 ◽  
pp. 106522
Author(s):  
Biao Zheng ◽  
Jing Li ◽  
Zhongkai Zheng ◽  
Cheng Zhang ◽  
Chunlei Huang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Functionalized Gold Nanoparticles
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