Research Interest

To measure various biopotential signals in a non-invasive way, generally standard Ag- AgCl electrodes are being used using largest organ the skin. This electrode possesses properties such as low steady potential, a low charge transfer resistance value, imperceptible interface impedance, and a negligible amount of inherent noise when coming in contact with the gel. Also, these electrodes have several shortcomings that necessitate the use of conductive gel, poor long-term monitoring performance because of gel drying, discomfort for users, and a history of skin irritation after use. In recent years, there has been a growing interest in developing gel-free electrodes for continuous and long-time biopotential measurements to overcome these shortcomings. In this context, we are working on skin-conformable electrodes that do not necessitate the use of gel by minimizing the air gap between electrodes and skin, and establishing the potential of this electrode as an alternative to standard Ag/AgCl electrode.

In recent years, LSG has gained much interest in biosensing applications. Unlike conventional printing techniques like screen printing, inkjet printing which requires multistep chemical processing before patterning, the direct printing technique (LSG) can reproduce complicated patterns by engraving on various substrates using a software interface without the requirement of any ink or a binder. Our laboratory is currently engaged in the development of innovative methodologies for the fabrication of LSG-based electrochemical biosensors to detect analytes where samples of interest present in low volume like sweat, tears, etc.