Yolk–shell nanostructured Fe3O4@C magnetic nanoparticles with enhanced peroxidase-like activity for label-free colorimetric detection of H2O2and glucose

Nanoscale ◽  
2017 ◽  
Vol 9 (13) ◽  
pp. 4508-4515 ◽  
Author(s):  
Na Lu ◽  
Min Zhang ◽  
Lei Ding ◽  
Jing Zheng ◽  
Caixia Zeng ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Colorimetric Detection ◽  
Label Free

scholarly journals Disulfide-induced self-assembled targets: A novel strategy for the label free colorimetric detection of DNAs/RNAs via unmodified gold nanoparticles

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Ehsan Shokri ◽  
Morteza Hosseini ◽  
Mehdi D. Davari ◽  
Mohammad R. Ganjali ◽  
Maikel P. Peppelenbosch ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Label Free ◽  
Self Assembled ◽  
Novel Strategy

Colorimetric Detection of MPT64 Antibody Based on an Aptamer Adsorbed Magnetic Nanoparticles for Diagnosis of Tuberculosis

2019 ◽  
Vol 19 (2) ◽  
pp. 622-626 ◽  
Author(s):  
Hong Jae Cheon ◽  
Sang Min Lee ◽  
Seong-Rok Kim ◽  
Ho Yun Shin ◽  
Yiel Hea Seo ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Colorimetric Detection

scholarly journals Volumetric registration of magnetic nanoparticles for optimization of quantitative immunochromatographic assays for detection of small molecules

2018 ◽  
Vol 185 ◽  
pp. 10006 ◽  
Author(s):  
Natalia V. Guteneva ◽  
Sergey L. Znoyko ◽  
Alexey V. Orlov ◽  
Maxim P. Nikitin ◽  
Petr I. Nikitin
Keyword(s):  
Magnetic Nanoparticles ◽  
Small Molecules ◽  
Optical Methods ◽  
Magnetic Method ◽  
Label Free ◽  
Spectral Correlation ◽  
Entire Volume ◽  
Specificity And Sensitivity ◽  
Particle Quantification

Precise quantitative and highly sensitive detection of small molecules (haptens) is highly demanded in medicine, food quality control, in vitro diagnostics, criminalistics, environmental monitoring, etc. In the present work, the magnetic method of particle quantification and the optical methods of spectral correlation and spectral phase interferometry complement each other for optimization of a quantitative assay for measuring concentrations of small molecules. The assay employs magnetic nanoparticles as labels in rapid immunochromatographic format. The approach was demonstrated with fluorescein as a model molecule. The interferometric label-free biosensors were employed for selection of optimal reagents that produced high specificity and sensitivity. The method of magnetic particle quantification counted the magnetic labels over the entire volume of the immunochromatographic membrane to provide their distribution along the test strip. Such distribution was used for optimization of such parameters as concentrations of the used reagents and of antibody immobilized on the labels, amount of the labels and conjugates of haptens with protein carriers to realize the advanced quantitative immunochromatographic assay.

Label-free colorimetric detection of deoxyribonuclease I activity based on the DNA-enhanced peroxidase-like activity of MIL-53(Fe)

2019 ◽  
Vol 43 (32) ◽  
pp. 12776-12784 ◽  
Author(s):  
Chan Song ◽  
Wei Ding ◽  
Haibo Liu ◽  
Weiwen Zhao ◽  
Yuewei Yao ◽  
...  
Keyword(s):  
Colorimetric Detection ◽  
Label Free ◽  
Single Stranded Dna ◽  
Deoxyribonuclease I

In this study, the effect of single-stranded DNA (ssDNA) on the intrinsic peroxidase-like activity of MIL-53(Fe) was investigated.

A sensitive gold nanoparticle-based aptasensor for colorimetric detection of Aβ1–40 oligomers

2018 ◽  
Vol 10 (6) ◽  
pp. 641-645 ◽  
Author(s):  
Xu Zhu ◽  
Ningning Zhang ◽  
Yintang Zhang ◽  
Baoxia Liu ◽  
Zhu Chang ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Colorimetric Detection ◽  
Label Free ◽  
Homogeneous Phase

A gold nanoparticle-based label-free homogeneous phase colorimetric bioassay was developed for the detection of Aβ1–40 oligomers.

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