Detection of virus and bacteria by using electrical impedance and electrical impedance spectroscopy
Conducting polymer sensor have been used for long for measurement of changes in pH in an electrochemical system setup. However, we discovered that even without a change in pH, the change in the charge cloud near the surface of a very thin film of conducting polymer might affect the polymer backbone leading to changes in electrical conductivity and optical properties. In this case we are concentrating on the electrical changes induced in the polymer due to binding of analyte species. This electrical change is best seen by impedance spectroscopy, where the sensor is subjected to a range of frequencies and the behavior is analysed using some basic level programming which can be done on a microcontroller.
Biosciences and Bioengineering