AI Article Synopsis
- A new functionalized pyrrole monomer called 3-pyrrolylacrylic acid (PAA) was synthesized and used to create a copolymer with pyrrole, named poly(Py-co-PAA).
- The copolymer was studied using techniques like FT-IR, UV-vis spectroscopy, and cyclic voltammetry, leading to the development of a label-free DNA sensor.
- The DNA sensor showed a significant increase in charge-transfer resistance when interacting with complementary DNA, indicating that the sensor's response could be quantitatively assessed based on the concentration of DNA targets.
Article Abstract
A new functionalized pyrrole monomer, 3-pyrrolylacrylic acid (PAA) was synthesized. It was used to prepare a copolymer with pyrrole, poly(Py-co-PAA), which was investigated by reflective FT-IR, UV-vis spectroscopy and cyclic voltammetry. A label-free DNA sensor was prepared based on a poly(Py-co-PAA) film. Hybridization with complementary and non-complementary DNA targets was studied by electrochemical impedance spectroscopy. Results show a significant increase in the charge-transfer resistance upon addition of complementary target. The impedance spectra were analyzed by using a modified Randles and Ershler equivalent circuit model. The change in charge-transfer resistance that was used as an index of sensor response was found to be linear with logarithmic target concentration in the range of 2 x 10(-9) to 2 x 10(-7)M. The detection limit was 0.98 nM.
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| http://dx.doi.org/10.1016/j.bios.2006.07.010 | DOI Listing |
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