scholarly journals Colorimetric Technique for Antimony Detection Based on the Use of Gold Nanoparticles Conjugated with Poly-A Oligonucleotide

2019 ◽  
Vol 9 (22) ◽  
pp. 4782
Author(s):  
Berlina ◽  
Komova ◽  
Zherdev ◽  
Gaur ◽  
Dzantiev
Keyword(s):  
Gold Nanoparticles ◽  
Drinking Water ◽  
Detection Limit ◽  
Gold Nanoparticle ◽  
Variation Coefficient ◽  
Sensitive Detection ◽  
Naked Eye ◽  
Nanoparticle Surface ◽  
Colorimetric Measurements ◽  
Target Analyte

A simple and rapid positive–negative colorimetric approach to determine the presence of antimony ions based on the use of gold nanoparticles conjugated with oligonucleotide (poly-A sequence) is developed. Colorimetric measurements reveal that the aggregates of modified gold nanoparticles were afforded after adding antimony ions, thus changing the solution color from pink to blue. The results of aptamer’s interaction on the gold nanoparticle surface with the target analyte can be detected either by photometry or by the naked eye. The realized assay provides rapid (2 min), sensitive (detection limit 10 ng/mL), specific, and precise (variation coefficient less than 3.8%) detection of antimony (III) in drinking water.

scholarly journals Colorimetric Technique for Antimony Detection Based on the Use of Gold Nanoparticles Conjugated with Poly-A Oligonucleotide

2019 ◽  
Author(s):  
Anna N. Berlina ◽  
Nadezhda S. Komova ◽  
Anatoly V. Zherdev ◽  
Mulayam S. Gaur ◽  
Boris B. Dzantiev
Keyword(s):  
Gold Nanoparticles ◽  
Drinking Water ◽  
Detection Limit ◽  
Gold Nanoparticle ◽  
Variation Coefficient ◽  
Sensitive Detection ◽  
Naked Eye ◽  
Nanoparticle Surface ◽  
Colorimetric Measurements ◽  
Target Analyte

A simple and rapid positive–negative colorimetric approach to determine the presence of antimony ions based on the use of gold nanoparticles conjugated with oligonucleotide (poly-A sequence) is developed. Colorimetric measurements reveal that the aggregates of modified gold nanoparticles were afforded after adding antimony ions, thus changing the solution color from pink to blue. The results of aptamer’s interaction on the gold nanoparticle surface with target analyte can be detected either by photometry or by the naked eye. The realized assay provides rapid (2 min), sensitive (detection limit 10 ng/mL), specific, and precise (variation coefficient less than 3.8%) detection of antimony (III) in drinking water

Highly sensitive ‘naked-eye’ colorimetric detection of thiourea using gold nanoparticles

2015 ◽  
Vol 7 (12) ◽  
pp. 4927-4933 ◽  
Author(s):  
Yi-Liang Cao ◽  
Yan Li ◽  
Fei Zhang ◽  
Jian-Zhong Huo ◽  
Xiao-Jun Zhao
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Colorimetric Detection ◽  
Sensitive Detection ◽  
Naked Eye ◽  
Colorimetric System ◽  
Highly Sensitive ◽  
Aqueous Environments

A non aggregation colorimetric system was developed for the fast and sensitive detection of thiourea in aqueous environments using an unlabeled gold nanoparticle probe.

Naked-eye colorimetric detection of HCV RNA mediated by a 5′ UTR-targeted antisense oligonucleotide and plasmonic gold nanoparticles

The Analyst ◽  
2021 ◽  
Author(s):  
Almas Shamaila Mohammed ◽  
Aniket Balapure ◽  
Mahammad Nanne Khaja ◽  
Ramakrishnan Ganesan ◽  
Jayati Ray Dutta
Keyword(s):  
Gold Nanoparticles ◽  
Antisense Oligonucleotide ◽  
Early Stage ◽  
Colorimetric Detection ◽  
Sensitive Detection ◽  
Clinical Samples ◽  
Hcv Rna ◽  
Naked Eye

An Au NP based facile strategy for the rapid, early-stage, and sensitive detection of HCV RNA in clinical samples which avoids thiol tagging to the antisense oligonucleotide and expensive infrastructure is presented.

Epoxidation of stilbene using supported gold nanoparticles: cumyl peroxyl radical activation at the gold nanoparticle surface

2014 ◽  
Vol 50 (18) ◽  
pp. 2289 ◽  
Author(s):  
Charles-Oneil L. Crites ◽  
Geniece L. Hallet-Tapley ◽  
María González-Béjar ◽  
J. C. Netto-Ferreira ◽  
Juan C. Scaiano
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Peroxyl Radical ◽  
Nanoparticle Surface ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

scholarly journals A Sensitive Resonance Rayleigh Scattering Method for Na+ Based on Graphene Oxide Nanoribbon Catalysis

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Haidong Wang ◽  
Chongning Li ◽  
Yanghe Luo ◽  
Zhiliang Jiang
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Detection Limit ◽  
Gold Nanoparticle ◽  
Rayleigh Scattering ◽  
Resonance Rayleigh Scattering ◽  
Scattering Method ◽  
Graphene Oxide Nanoribbons ◽  
Potassium Pyroantimonate ◽  
Coordination Reaction

The gold nanoparticle reaction of HAuCl4-H2O2 was very slow under 60°C, and the as-prepared graphene oxide nanoribbons (GONRs) exhibited strong catalysis of the reaction to form gold nanoparticles (AuNP) that appeared a resonance Rayleigh scattering (RRS) peak at 550 nm. Upon addition of potassium pyroantimonate (PA) ligand, it was adsorbed on the GONRs surface to inhibit the catalysis to cause the RRS peak decreasing. When the analyte of Na+ was added, the coordination reaction between PA and Na+ took place to form the stable complexes of [Na2(PA)] to release free GONRs catalyst that resulted in the RRS peak increasing linearly. Accordingly, a new and sensitive RRS method for Na+ was established, with a linear range of 0.69-25.8 nmol/L and a detection limit of 0.35 nmol/L Na+.

Nucleobase assisted pyrene functionalization of gold nanoparticles

2021 ◽  
Author(s):  
M S S Vinod Mouli ◽  
Arpna Tamrakar ◽  
Mrituanjay D Pandey ◽  
Ashutosh Kumar Mishra
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Nanoparticle Surface ◽  
Photoluminescence Behavior

Herein, we report the functionalization of the gold nanoparticles with pyrene fluorophore via a connecting nucleobase spacer displaying the inherent photoluminescence behavior, without getting quenched by the gold nanoparticle surface...

scholarly journals A new detection tube to detect hydrogen cyanide in the air

2014 ◽  
Vol 20 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Vladimír Pitschmann ◽  
Zbyněk Kobliha ◽  
Ivana Tusarová ◽  
Lucie Bártová ◽  
David Vetchý ◽  
...  
Keyword(s):  
Composite Material ◽  
Detection Limit ◽  
Microcrystalline Cellulose ◽  
Hydrogen Cyanide ◽  
Sensitive Detection ◽  
Visual Evaluation ◽  
Naked Eye ◽  
Colored Product

A new simple and sensitive detection tube to detect hydrogen cyanide in the air has been developed. The detection tube is based on the reaction of hydrogen cyanide with 4-nitrobenzil to form a violet colored product. The reaction takes place on the carrier made of a composite material which was prepared by pelletization of a mixture of microcrystalline cellulose and MgO. The detection tube can detect hydrogen cyanide in the air in the range of concentrations 0.1-100 mg.m-3 based on visual evaluation (by naked eye) of the change of indication layer coloring and comparison with etalon. The detection limit is 0.05 mg.m-3. The detection tube is highly selective and sufficiently stable during storage.

Oxidation-triggered aggregation of gold nanoparticles for naked-eye detection of hydrogen peroxide

2016 ◽  
Vol 52 (17) ◽  
pp. 3508-3511 ◽  
Author(s):  
Shaojue Wu ◽  
Si Yu Tan ◽  
Chung Yen Ang ◽  
Zhong Luo ◽  
Yanli Zhao
Keyword(s):  
Hydrogen Peroxide ◽  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Eye Detection ◽  
Surface Hydrophilicity ◽  
Naked Eye ◽  
Naked Eye Detection

A gold nanoparticle-based platform for naked-eye detection of H2O2 was realized by changing the surface hydrophilicity.

Gold nanoparticle-based fluorescent “turn-on” sensing system for the selective detection of mercury ions in aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95268-95272 ◽  
Author(s):  
Sohee Choi ◽  
Youngmi Kim
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Sensitive Detection ◽  
Selective Detection ◽  
Mercury Ions ◽  
Buffer Solution ◽  
Aqueous Buffer ◽  
Turn On ◽  
Sensing System

A simple and straightforward fluorometric assay using dye-adsorbed gold nanoparticles (AuNPs) was used in the highly selective and sensitive detection of mercury ions in aqueous buffer solution.

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