89059-06-3Relevant articles and documents
The development of an ultra-sensitive electrochemical immunosensor using a PPyr-NHS functionalized disposable ITO sheet for the detection of interleukin 6 in real human serums
Aydin, Elif Burcu,Aydin, Muhammet,Sezgintürk, Mustafa Kemal
, p. 14228 - 14238 (2020)
A label-free impedimetric immunosensor based on a conjugated poly(pyrrole N-hydroxy succinimide) (PPyr-NHS) polymer covered disposable indium tin oxide electrode (ITO) was fabricated for the ultrasensitive determination of interleukin 6 (IL 6) antigen. In this sensing platform, the PPyr-NHS polymer, which carried a number of succinimide groups on its end side, was used as a matrix material for the first time. This synthesized polymer had excellent biocompatibility and good electrical conductivity. In addition, the utilization of this material as a matrix material provided direct immobilization of the IL 6 receptor (IL6R), which was employed as a biorecognition element. The preparation of the working electrode, the successful attachment of IL 6R and specific interaction between IL6R and IL 6 antigen were confirmed by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques. Moreover, the working electrode surface was characterized by Scanning electron microscopy (SEM), Atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy during its construction. An impedimetric method was employed for the quantification of IL 6 antigen. Under optimized experimental conditions, the designed sensing platform could detect IL 6 antigen with a wide detection range from 0.03 pg mL-1 to 22.5 pg mL-1 with a relatively low detection limit of 10.2 fg mL-1. In addition, the developed biosensor had outstanding sensitivity and specificity, good repeatability and reproducibility, high stability and reusability. Additionally, the designed sensing tool was successfully used in human serum samples. Consequently, the suggested immunosensor was clinically useful in the early detection of prostate cancer by direct determination of the serum IL 6 antigen level after simple dilution.
Electrochemical polymerization of pyrrole containing TEMPO side chain on pt electrode and its electrochemical activity
Lu, Jin-Jin,Ma, Jia-Qi,Yi, Jing-Miao,Shen, Zhen-Lu,Zhong, Yi-Jun,Ma, Chun-An,Li, Mei-Chao
, p. 412 - 417 (2014/04/17)
Poly(4-(3-(pyrrol-1-yl)propionyloxy)-2,2,6,6-tetramethylpiperidin-1-yloxy) (PPy-TEMPO) electrode is prepared by electrochemical polymerization on Pt electrode in NaClO4-CH3CN solution. The electrocatalytic activity of PPy-TEMPO for benzyl alcohol in NaClO4-CH3CN solution is investigated by cyclic voltammetry and in situ FTIR. Results show that PPy-TEMPO electrode exhibits high electrocatalytic activity for benzyl alcohol oxidation in the presence of 2,6-lutidine as the base, as compared with the bare Pt electrode under the similar conditions. On the basis of in situ FTIR data, it shows that TEMPO is oxidized to its cation at the potential about 0.4 V, and benzyl alcohol is oxidized to benzaldehyde instead of benzoic acid. Further studies of preparative electrolysis experiments by constant current electrolysis are carried out to confirm the high conversion to benzaldehyde, and the results are in good agreement with those from in situ FTIR investigations.
Electropolymerizable monomers and polymeric coatings on implantable devices prepared therefrom
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Page/Page column 17, (2008/06/13)
Conductive surfaces of e.g., implantable devices, coated with electropolymerized polymers having active substances attached thereto are disclosed. Electropolymerizable monomers designed and used for obtaining such conductive surfaces and processes, devices and methods for attaching the electropolymerized polymers to conductive surfaces are also disclosed. The polymers, processes and devices presented herein can be beneficially used in the preparation of implantable medical devices.
