Cationic polymers and aptamers mediated aggregation of gold nanoparticles for the colorimetric detection of arsenic(iii) in aqueous solution

2012 ◽  
Vol 48 (37) ◽  
pp. 4459 ◽  
Author(s):  
Yuangen Wu ◽  
Shenshan Zhan ◽  
Faze Wang ◽  
Lan He ◽  
Wenting Zhi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Cationic Polymers

Colorimetric Detection of Trace Arsenic(III) in Aqueous Solution Using Arsenic Aptamer and Gold Nanoparticles

2014 ◽  
Vol 67 (5) ◽  
pp. 813 ◽  
Author(s):  
Minglei Yu
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Detection Limit ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Colour Change ◽  
Colorimetric Sensing ◽  
Detection Range ◽  
Colorimetric Indicator ◽  
Blue Solution

In this study, trace arsenic(iii) (AsIII) in aqueous solution was detected by applying a classical aptamer-based gold nanoparticles colorimetric sensing strategy. An arsenic aptamer was used as a sensing probe and gold nanoparticles as a colorimetric indicator. In the absence of AsIII, the gold nanoparticles were stabilised by the arsenic aptamer and remained dispersed at high NaCl concentrations, displaying a red solution. Contrarily, in the presence of AsIII, the gold nanoparticles were prone to aggregation, owing to the formation of aptamer–AsIII complex between the arsenic aptamer and AsIII, and thus exhibited a blue solution. By monitoring the colour change, a simple and fast colorimetric assay for AsIII was established with a detection range of 1.26–200 ppb and a detection limit of 1.26 ppb. Because this colorimetric assay only involves common reagents and can be assessed visually, it holds great potential for arsenic(iii) monitoring in environment-related and other applications.

Colorimetric sensing of chromium(vi) ions in aqueous solution based on the leaching of protein-stabled gold nanoparticles

2016 ◽  
Vol 8 (27) ◽  
pp. 5526-5532 ◽  
Author(s):  
Guo Jian-feng ◽  
Hou Chang-jun ◽  
Yang Mei ◽  
Huo Dan-qun ◽  
Li Jun-jie ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Colorimetric Sensing ◽  
Chromium Vi

Herein, we developed a simple, sensitive and non-aggregation-based method for the selective colorimetric detection of chromium(vi) ions (Cr(vi)) in an aqueous solution.

Colorimetric detection of ciprofloxacin in aqueous solution based on an unmodified aptamer and the aggregation of gold nanoparticles

2021 ◽  
Vol 13 (1) ◽  
pp. 90-98
Author(s):  
Weiwen Huang ◽  
Yichen Wang ◽  
Lumei Wang ◽  
Chaoqiang Pan ◽  
Guoqing Shen
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Colorimetric Detection

Sensitive and selective colorimetric detection of ciprofloxacin based on an unmodified aptamer and the aggregation of AuNPs induced by PDDA.

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.

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 Cr3+ ions in aqueous solution using poly(γ-glutamic acid)-stabilized gold nanoparticles

2020 ◽  
Vol 12 (24) ◽  
pp. 3145-3150 ◽  
Author(s):  
Xin Yuan ◽  
Benqing Zhou ◽  
Maoquan Li ◽  
Mingwu Shen ◽  
Xiangyang Shi
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Glutamic Acid ◽  
Colorimetric Detection ◽  
Colorimetric Sensing

Poly(γ-glutamic acid)-stabilized gold nanoparticles enable sensitive and selective colorimetric sensing of Cr3+ ions in aqueous solution.

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+.

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