A highly sensitive colorimetric sensor for adrenaline detection based on organic molecules-functionalized gold nanoparticles

2015 ◽  
Vol 207 ◽  
pp. 277-280 ◽  
Author(s):  
Zhengbo Chen ◽  
Yiming Hu ◽  
Qinrui Yang ◽  
Chongqing Wan ◽  
Yuan Tan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Organic Molecules ◽  
Colorimetric Sensor ◽  
Functionalized Gold Nanoparticles ◽  
Highly Sensitive

The highly sensitive and facile colorimetric detection of the glycidyl azide polymer based on propargylamine functionalized gold nanoparticles using click chemistry

2015 ◽  
Vol 51 (60) ◽  
pp. 12092-12094 ◽  
Author(s):  
Yi He ◽  
Yun Liang ◽  
Dunju Wang
Keyword(s):  
Gold Nanoparticles ◽  
Click Chemistry ◽  
Colorimetric Detection ◽  
Colorimetric Sensor ◽  
Glycidyl Azide Polymer ◽  
Functionalized Gold Nanoparticles ◽  
Highly Sensitive ◽  
Glycidyl Azide

A highly sensitive and facile colorimetric sensor for the glycidyl azide polymer explosive was developed based on propargylamine functionalized gold nanoparticles using click chemistry.

scholarly journals Mercaptosuccinic-Acid-Functionalized Gold Nanoparticles for Highly Sensitive Colorimetric Sensing of Fe(III) Ions

Chemosensors ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 290
Author(s):  
Nadezhda S. Komova ◽  
Kseniya V. Serebrennikova ◽  
Anna N. Berlina ◽  
Svetlana M. Pridvorova ◽  
Anatoly V. Zherdev ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Drinking Water ◽  
Detection Limit ◽  
Analytical Signal ◽  
Colorimetric Sensor ◽  
World Health ◽  
Colorimetric Sensing ◽  
Functionalized Gold Nanoparticles ◽  
Mercaptosuccinic Acid ◽  
Highly Sensitive

The development of reliable and highly sensitive methods for heavy metal detection is a critical task for protecting the environment and human health. In this study, a qualitative colorimetric sensor that used mercaptosuccinic-acid-functionalized gold nanoparticles (MSA-AuNPs) to detect trace amounts of Fe(III) ions was developed. MSA-AuNPs were prepared using a one-step reaction, where mercaptosuccinic acid (MSA) was used for both stabilization, which was provided by the presence of two carboxyl groups, and functionalization of the gold nanoparticle (AuNP) surface. The chelating properties of MSA in the presence of Fe(III) ions and the concentration-dependent aggregation of AuNPs showed the effectiveness of MSA-AuNPs as a sensing probe with the use of an absorbance ratio of A530/A650 as an analytical signal in the developed qualitative assay. Furthermore, the obvious Fe(III)-dependent change in the color of the MSA-AuNP solution from red to gray-blue made it possible to visually assess the metal content in a concentration above the detection limit with an assay time of less than 1 min. The detection limit that was achieved (23 ng/mL) using the proposed colorimetric sensor is more than 10 times lower than the maximum allowable concentration for drinking water defined by the World Health Organization (WHO). The MSA-AuNPs were successfully applied for Fe(III) determination in tap, spring, and drinking water, with a recovery range from 89.6 to 126%. Thus, the practicality of the MSA-AuNP-based sensor and its potential for detecting Fe(III) in real water samples were confirmed by the rapidity of testing and its high sensitivity and selectivity in the presence of competing metal ions.

Rapid and selective lead (II) colorimetric sensor based on azacrown ether-functionalized gold nanoparticles

2010 ◽  
Vol 21 (31) ◽  
pp. 315503 ◽  
Author(s):  
A Alizadeh ◽  
M M Khodaei ◽  
Ch Karami ◽  
M S Workentin ◽  
M Shamsipur ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Sensor ◽  
Azacrown Ether ◽  
Functionalized Gold Nanoparticles

Colorimetric sensor assay for discrimination of proteins based on exonuclease I-triggered aggregation of DNA-functionalized gold nanoparticles

The Analyst ◽  
2019 ◽  
Vol 144 (16) ◽  
pp. 4865-4870 ◽  
Author(s):  
Fangfang Jia ◽  
Qingyun Liu ◽  
Wei Wei ◽  
Zhengbo Chen
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Sensor ◽  
Exonuclease I ◽  
Functionalized Gold Nanoparticles

A colorimetric sensor assay for discrimination of proteins based on exonuclease I-triggered aggregation of DNA-functionalized gold nanoparticles.

scholarly journals Tannic Acid-Capped Gold Nanoparticles as a Novel Nanozyme for Colorimetric Determination of Pb2+ Ions

Chemosensors ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 332
Author(s):  
Kseniya V. Serebrennikova ◽  
Nadezhda S. Komova ◽  
Anna N. Berlina ◽  
Anatoly V. Zherdev ◽  
Boris B. Dzantiev
Keyword(s):  
Gold Nanoparticles ◽  
Tannic Acid ◽  
Oxidation Reaction ◽  
Limit Of Detection ◽  
Colorimetric Sensor ◽  
Spring Water ◽  
Colorimetric Determination ◽  
Highly Sensitive ◽  
Maximal Sensitivity

In this study, tannic acid-modified gold nanoparticles were found to have superior nanozyme activity and catalyze the oxidation reaction of 3,3′,5,5′-tetramethylbenzidine in the presence of hydrogen peroxide. Enhancing the catalytic activity of the nanozyme by Pb2+ ions caused by selectively binding metal ions by the tannic acid-capped surface of gold nanoparticles makes them an ideal colorimetric probe for Pb2+. The parameters of the reaction, including pH, incubation time, and concentration of components, were optimized to reach maximal sensitivity of Pb2+ detection. The absorption change is directly proportional to the Pb2+ concentration and allows the determination of Pb2+ ions within 10 min. The colorimetric sensor is characterized by a wide linear range from 25 to 500 ng×mL−1 with a low limit of detection of 11.3 ng×mL−1. The highly sensitive and selective Pb2+ detection in tap, drinking, and spring water revealed the feasibility and applicability of the developed colorimetric sensor.

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