scholarly journals Cu@Au(Ag)/Pt nanocomposite as peroxidase mimic and application of Cu@Au/Pt in colorimetric detection of glucose and l-cysteine

RSC Advances ◽  
2019 ◽  
Vol 9 (71) ◽  
pp. 41561-41568 ◽  
Author(s):  
Cuifeng Jiang ◽  
Xiaoxiu Wei ◽  
Shuai Bao ◽  
Huajian Tu ◽  
Wei Wang
Keyword(s):  
Colorimetric Detection ◽  
Peroxidase Mimic

Cu@Au(Ag)/Pt nanocomposite possess good peroxidase-like activity and can be used for detection of glucose and l-cysteine.

Identifying the active site of ultrathin NiCo LDH as an efficient peroxidase mimic with superior substrate affinity for sensitive detection of hydrogen peroxide

2019 ◽  
Vol 7 (40) ◽  
pp. 6232-6237 ◽  
Author(s):  
Yue Sun ◽  
Hai Xu ◽  
Xi Zhao ◽  
Zengyu Hui ◽  
Chenyang Yu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Active Site ◽  
Colorimetric Detection ◽  
Sensitive Detection ◽  
Substrate Affinity ◽  
Peroxidase Mimic

Ultra-thin NiCo LDH was synthesized as a nanozyme for sensitive colorimetric detection of H2O2 and its active site was identified.

Double enzymatic cascade reactions within FeSe–Pt@SiO2 nanospheres: synthesis and application toward colorimetric biosensing of H2O2 and glucose

The Analyst ◽  
2015 ◽  
Vol 140 (19) ◽  
pp. 6684-6691 ◽  
Author(s):  
Fengmin Qiao ◽  
Zhenzhen Wang ◽  
Ke Xu ◽  
Shiyun Ai
Keyword(s):  
Colorimetric Detection ◽  
Cascade Reactions ◽  
Cascade Reaction ◽  
Peroxidase Mimic ◽  
Colorimetric Biosensing

The FeSe–Pt@SiO2 nanospheres possessed both intrinsic GOx- and peroxidase-mimic activities, which realized colorimetric detection of glucose through a cascade reaction.

Colorimetric Detection of Hg(II) Sensor Based on Mos2 Nanosheets Acting as Peroxidase Mimics

2021 ◽  
Vol 37 (3) ◽  
pp. 679-682
Author(s):  
S. Kavitha ◽  
S. Mary Jelastin Kala ◽  
A. Anand Babu Christus
Keyword(s):  
Colorimetric Detection ◽  
High Sensitivity ◽  
Colorimetric Determination ◽  
X Ray Diffraction ◽  
Mos2 Nanosheets ◽  
Peroxidase Mimic ◽  
Sem Image ◽  
Peroxidase Mimics ◽  
Ft Ir

This paper presents colorimetric determination of Hg(II) based on MoS2 nanosheets with peroxidase mimics activity. The structure of the this sensor by the peroxidase mimic activity material of MoS2 nanosheets with TMB (Tetramethylbenzidine) solution, the colorimetric detection target of Hg(II) is determined by on-off mechanism using biomolecule of cysteine. The MoS2 nanosheets evaluated by X-ray diffraction, FT-IR and SEM image, confirms formation of a flower like structure. Our results shows that a simple colorimetric detection using peroxidase mimic mechanism can be used to MoS2 nanosheets and determine the Hg(II) in aqueous solution with high sensitivity (10 nM) comparable to those of other nanomaterials. The result suggests that MoS2 nanosheets is a promising new and simple colorimetric sensor for applications in environmental and biological applications.

Stable gold nanoparticles as a novel peroxidase mimic for colorimetric detection of cysteine

2016 ◽  
Vol 8 (11) ◽  
pp. 2494-2501 ◽  
Author(s):  
Rong Sheng Li ◽  
Hai Liu ◽  
Bin Bin Chen ◽  
Hong Zhi Zhang ◽  
Cheng Zhi Huang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Colorimetric Detection ◽  
High Sensitivity ◽  
Peroxidase Mimic ◽  
Sensitivity And Selectivity ◽  
Blue Solution

In this work, stable gold nanoparticles (AuNPs) were prepared with good compatibility and favorable catalytic activity. They were developed as a peroxidase mimic for colorimetric detection of cysteine with a weakened blue solution, which supplied high sensitivity and selectivity.

Construction and Stabilization of a Peptide-based Peroxidase Mimic for the Colorimetric Detection of Uric Acid and Sarcosine

2021 ◽  
pp. 129149
Author(s):  
Zhiqiang Ma ◽  
Lijun Yang ◽  
Yutong Wang ◽  
Mengfan Wang ◽  
Wei Qi ◽  
...  
Keyword(s):  
Uric Acid ◽  
Colorimetric Detection ◽  
Peroxidase Mimic

Chiral FexCuySe nanoparticles as peroxidase mimics for colorimetric detection of 3, 4-dihydroxy-phenylalanine enantiomers

2021 ◽  
Author(s):  
Shuyang Hu ◽  
Qiuyan Shuai ◽  
Yulong Lin ◽  
Yan Fu ◽  
Meng Li
Keyword(s):  
Quality Control ◽  
Colorimetric Detection ◽  
Cost Effective ◽  
Drug Analysis ◽  
High Catalytic Activity ◽  
Chiral Ligand ◽  
Peroxidase Mimic ◽  
Disease Treatment ◽  
Peroxidase Mimics

Abstract L-3,4-dihydroxy-phenylalanine (L-dopa) is the most widely used drug in Parkinson's disease treatment. However, development of cost-effective and high-throughput sensors to accurate enantioselective discrimination of L-dopa and D-dopa remains challenging to date. Herein, on the basis of the peroxidase-mimic activity of chiral FexCuySe nanoparticles, we demonstrated a novel colorimetric sensor for determination of chiral dopa. The surface chiral ligand, L/D-histidine (L/D-His), endowed the nanozymes with enantioselectivity in catalyzing the oxidation of dopa enantiomers. According to the values of kcat/Km, the efficiency of L-His modified nanoparticle (L-FexCuySe NPs) towards L-dopa was 1.56 times higher than that of D-dopa. While, D-His can facilely reverse the preference of the nanozyme to D-dopa. On the basis of high catalytic activity and enantioselectivity of L-FexCuySe NPs in oxidation of L-dopa, the L-FexCuySe NPs based system can be utilized for detection of L-dopa. The linear ranges for L-dopa determination were 5 µM to 0.125 mM and 0.125 mM to 1 mM with a detection limit of 1.02 µM. Critically, the developed sensor has been successfully applied in the quality control of clinical used L-dopa tablets. Our work sheds light on developing simple and sensitive chiral nanomaterials-based sensors for drug analysis.

Pd nanoparticles supported on nitrogen, sulfur-doped three-dimensional hierarchical nanostructures as peroxidase-like catalysts for colorimetric detection of xanthine

RSC Advances ◽  
2015 ◽  
Vol 5 (41) ◽  
pp. 32183-32190 ◽  
Author(s):  
Weijie Shi ◽  
Hai Fan ◽  
Shiyun Ai ◽  
Lusheng Zhu
Keyword(s):  
Colorimetric Detection ◽  
Three Dimensional ◽  
Pd Nanoparticles ◽  
Sensitive Detection ◽  
Peroxidase Mimic ◽  
Hierarchical Nanostructures ◽  
Hierarchical Nanostructure

Pd nanoparticles supported on N, S-doped three-dimensional hierarchical nanostructure acts as novel peroxidase mimic for sensitive detection of xanthine.

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