scholarly journals Poly(methylene blue)-Based Electrochemical Platform for Label-Free Sensing of Acrylamide

ACS Omega ◽  
2021 ◽  
Author(s):  
Anthonysamy Esokkiya ◽  
Sudalaimuthu Sudalaimani ◽  
Kannan Sanjeev Kumar ◽  
Prakasam Sampathkumar ◽  
Chinnathambi Suresh ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Label Free

Construction of electrochemical immunosensor based on redox hydrogel for ultrasensitive detection of carcinoembryonic antigen

2021 ◽  
Author(s):  
Xiangrong Huang ◽  
Na Wu ◽  
Wenxiu Liu ◽  
Yazhuo Shang ◽  
Honglai Liu ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Carcinoembryonic Antigen ◽  
Electrochemical Detection ◽  
Electrochemical Immunosensor ◽  
Ultrasensitive Detection ◽  
Label Free

In this work, a novel redox hydrogel was proposed for ultrasensitive label-free electrochemical detection of carcinoembryonic antigen (CEA). The redox hydrogel composed by cellulose nanocrystalline (CNC), methylene blue (MB), multi-walled...

A label-free photoelectrochemical aptasensor for facile and ultrasensitive mercury ion assay based on a solution-phase photoactive probe and exonuclease III-assisted amplification

The Analyst ◽  
2019 ◽  
Vol 144 (12) ◽  
pp. 3800-3806 ◽  
Author(s):  
Ningning Xu ◽  
Ting Hou ◽  
Feng Li
Keyword(s):  
Methylene Blue ◽  
Homogeneous Solution ◽  
Mercury Ion ◽  
Solution Phase ◽  
Label Free ◽  
Exonuclease Iii ◽  
Working Electrode ◽  
Ito Glass

An immobilization-free and label-free PEC aptasensing strategy has been developed, with methylene blue in homogeneous solution as a photoactive probe and bare ITO glass as a working electrode and ultrasensitive and highly specific Hg2+ analysis is successfully achieved.

scholarly journals Magnetic Imprinted Polymer-Based Quartz Crystal Microbalance Sensor for Sensitive Label-Free Detection of Methylene Blue in Groundwater

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5506
Author(s):  
Yufeng Hu ◽  
Hanwen Xing ◽  
Gang Li ◽  
Minghuo Wu
Keyword(s):  
Methylene Blue ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzene Sulfonate ◽  
Intrinsic Property ◽  
Label Free ◽  
Target Species ◽  
Label Free Detection ◽  
Seawater Samples

Tiny changes in the mass of the sensor in a quartz crystal microbalance with dissipation monitoring (QCM-D) can be observed. However, the lack of specificity for target species has hindered the use of QCM-D. Here, molecularly imprinted polymers (MIPs) were used to modify a QCM-D sensor to provide specificity. The MIPs were formed in the presence of sodium dodecyl benzene sulfonate. Imprinted layers on Fe3O4 nanoparticles were formed using pyrrole as the functional monomer and cross-linker and methylene blue (MB) as a template. The MIPs produced were then attached to the surface of a QCM-D sensor. The MIPs-coated QCM-D sensor could recognize MB and gave a linear response in the concentration range 25 to 1.5 × 102 µg/L and a detection limit of 1.4 µg/L. The QCM-D sensor was selective for MB over structural analogs. The MIPs-coated QCM-D sensor was successfully used to detect MB in river water and seawater samples, and the recoveries were good. This is the first time MB has been detected using a QCM-D sensor. Mass is an intrinsic property of matter, so this method could easily be extended to other target species by using different MIPs.

Methylene Blue as a G-Quadruplex Binding Probe for Label-Free Homogeneous Electrochemical Biosensing

2014 ◽  
Vol 86 (19) ◽  
pp. 9489-9495 ◽  
Author(s):  
Fang-Ting Zhang ◽  
Ji Nie ◽  
De-Wen Zhang ◽  
Ji-Tao Chen ◽  
Ying-Lin Zhou ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Label Free ◽  
Electrochemical Biosensing ◽  
G Quadruplex

Responsive methylene blue release from lanthanide coordination polymer for label-free, immobilization-free and sensitive electrochemical alkaline phosphatase activity assay

The Analyst ◽  
2019 ◽  
Vol 144 (20) ◽  
pp. 5971-5979 ◽  
Author(s):  
Zhiqiang Chen ◽  
Shuang Liu ◽  
Xiaoxiao Yu ◽  
Lijie Hao ◽  
Li Wang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Alkaline Phosphatase ◽  
Coordination Polymer ◽  
Phosphatase Activity ◽  
Alkaline Phosphatase Activity ◽  
Label Free ◽  
Activity Assay ◽  
Lanthanide Coordination Polymer ◽  
Stimulus Responsive

A stimulus responsive methylene blue releasing and enriching strategy for sensitive electrochemical alkaline phosphatase activity assay.

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