Ratiometric Antifouling Electrochemical Biosensors Based on Multifunctional Peptides and MXene Loaded with Au Nanoparticles and Methylene Blue

2021 ◽  
Author(s):  
Yan Xu ◽  
Xinyan Wang ◽  
Caifeng Ding ◽  
Xiliang Luo
Keyword(s):  
Methylene Blue ◽  
Au Nanoparticles ◽  
Electrochemical Biosensors ◽  
Multifunctional Peptides

scholarly journals Graphdiyne bearing pillar[5]arene-reduced Au nanoparticles for enhanced catalytic performance towards the reduction of 4-nitrophenol and methylene blue

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38372-38380 ◽  
Author(s):  
Xiaoping Tan ◽  
Jianhua Xu ◽  
Ting Huang ◽  
Sheng Wang ◽  
Maojie Yuan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Au Nanoparticles ◽  
Catalytic Performance ◽  
Hybrid Nanomaterial ◽  
P Application

Application of a novel 2D heterogeneous hybrid nanomaterial based on graphdiyne and pillar[5]arene-reduced Au nanoparticles in catalyzing the reduction of 4-nitrophenol and methylene blue.

Detection of Cytochrome C Using a Selective and Sensitive Methylene Blue-Based Electrochemical Aptasensor

2020 ◽  
pp. 1-8
Author(s):  
Mohadeseh Safaei ◽  
Hadi Beitollahi ◽  
Masoud Reza Shishehbore
Keyword(s):  
Methylene Blue ◽  
Detection Limit ◽  
Cytochrome C ◽  
Au Nanoparticles ◽  
Sandwich Immunoassay ◽  
Electrochemical Aptasensor ◽  
Au Nps ◽  
Peak Current ◽  
Aptamer Probe

The present research aimed to detect the cytochrome C using methylene blue (MB)-anchored ultrasensitive electrochemical aptamer conjugated with Au nanoparticles (NPs), as a new electrochemical sandwich immunoassay. Aptamer-Au NPs could act as sandwich amplification element and MB accumulation reagent. According to the results, the interaction of MB and guanine occurred strongly on aptamer probe. After switching the aptamer structure by the cytochrome C, the MB- labeled aptamer probe was forced to detach from the sensing interface. Moreover, the cytochrome C concentrations (0.05-10.0 µM) with 5.0 nM detection limit reduced linearly the peak current of MB. In conclusion, an acceptable selectivity was observed for the constructed aptasensor in detecting the cytochrome C.

The significant impact of polydopamine on the catalytic performance of the carried Au nanoparticles

2015 ◽  
Vol 51 (8) ◽  
pp. 1469-1471 ◽  
Author(s):  
Aijing Ma ◽  
Yijun Xie ◽  
Jie Xu ◽  
Hongbo Zeng ◽  
Haolan Xu
Keyword(s):  
Methylene Blue ◽  
Au Nanoparticles ◽  
Catalytic Performance

The polydopamine carrier causes the enrichment of methylene blue toward its surface, leading to the improved catalytic performance of the carried Au nanoparticles.

Synthesis of Au/TiO2 Thin Films for Photocatalytic Degradation of Methylene Blue

2009 ◽  
Vol 1242 ◽  
Author(s):  
F. Palomar ◽  
I. Gómez ◽  
Patricia Zambrano
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Spray Pyrolysis ◽  
Au Nanoparticles ◽  
Anatase Phase ◽  
Sol Gel ◽  
Dip Coating ◽  
Spray Pyrolysis Method ◽  
Pyrolysis Method

ABSTRACTAu/TiO2 thin films have been prepared from Titanium Tetrabuthoxide-acetylacetone solution and buthanol as solvent by sol-gel and dip-coating technique. Au nanoparticles were prepared from HAuCl4 solution. The deposition of Au nanoparticles was by spray pyrolysis method. The films from the sol gel solution were heat treated at 450°C for 1 hour. The surface structures, morphology, composition and optical properties on the films were investigated by atomic force microscopy (AFM), optical microscopy (OM), X-ray Diffraction (XRD) and UV-Vis spectrometer. It was found the film consisted of anatase phase (TiO2), Au nanoparticles in the range of 50 to 100 nm, and few cracks on the surface remaining attached to the glass substrate. In this study, we measured the photocatalytic degradation of a methylene blue (MB) aqueous solution by a film prepared by the sol-gel and dip-coating methods TiO2 and Au/TiO2films prepared by spray pyrolysis method. We found that Au nanoparticles deposited on the TiO2films improved the photocatalytic activity and minor degradation time that TiO2 films.

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