Electrochemical DNA Sensor Based on Poly(Azure A) Obtained from the Buffer Saturated with Chloroform.

Anna Porfireva, Kseniya Plastinina, Vladimir Evtugyn, Yurii Kuzin, Gennady Evtugyn

Sensors (Basel, Switzerland) 2021 Apr 22

filter terms:

Electropolymerized redox polymers offer broad opportunities in detection of biospecific interactions of DNA. In this work, Azure A was electrochemically polymerized by multiple cycling of the potential in phosphate buffer saturated with chloroform and applied for discrimination of the DNA damage. The influence of organic solvent on electrochemical properties of the coating was quantified and conditions for implementation of DNA in the growing polymer film were assessed using cyclic voltammetry, quartz crystal microbalance, and electrochemical impedance spectroscopy. As shown, both chloroform and DNA affected the morphology of the polymer surface and electropolymerization efficiency. The electrochemical DNA sensor developed made it possible to distinguish native and thermally and chemically damaged DNA by changes in the charge transfer resistance and capacitance.

Citation

Anna Porfireva, Kseniya Plastinina, Vladimir Evtugyn, Yurii Kuzin, Gennady Evtugyn. Electrochemical DNA Sensor Based on Poly(Azure A) Obtained from the Buffer Saturated with Chloroform. Sensors (Basel, Switzerland). 2021 Apr 22;21(9)