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.

Zwitterionic peptide-capped gold nanoparticles for colorimetric detection of Ni2+

Nanoscale ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 5466-5473 ◽  
Author(s):  
Attasith Parnsubsakul ◽  
Sukunya Oaew ◽  
Werasak Surareungchai
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Sensitive Detection ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

Recyclable zwitterionic peptide-capped AuNPs for highly sensitive detection of Ni2+.

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

scholarly journals CRISPR/Cas12a-mediated gold nanoparticle aggregation for colorimetric detection of SARS-CoV-2

2021 ◽  
Author(s):  
Yiren Cao ◽  
Jinjun Wu ◽  
Bo Pang ◽  
Hongquan Zhang ◽  
X. Chris Le
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Colorimetric Detection ◽  
Isothermal Amplification ◽  
Nanoparticle Aggregation ◽  
Cleavage Activity ◽  
Gold Nanoparticle Aggregation

The trans-cleavage activity of the target-activated CRISPR-Cas12a liberated an RNA crosslinker from a molecular transducer, which facilitated assembly of gold nanoparticles. Integration of the molecular transducer with isothermal amplification and...

scholarly journals Highly sensitive colorimetric detection of 17β-estradiol using split DNA aptamers immobilized on unmodified gold nanoparticles

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Jinchuan Liu ◽  
Wenhui Bai ◽  
Shucao Niu ◽  
Chao Zhu ◽  
Shuming Yang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Dna Aptamers ◽  
Highly Sensitive ◽  
17Β Estradiol

scholarly journals Rapid and highly sensitive detection of pyocyanin biomarker in different Pseudomonas aeruginosa infections using gold nanoparticles modified sensor

PLoS ONE ◽  
2019 ◽  
Vol 14 (7) ◽  
pp. e0216438 ◽  
Author(s):  
Amal A. Elkhawaga ◽  
Marwa M. Khalifa ◽  
Omnia El-badawy ◽  
Mona A. Hassan ◽  
Waleed A. El-Said
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Gold Nanoparticles ◽  
Sensitive Detection ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Modified Sensor
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