Ramji Kalidoss at the Breath Biopsy Conference 2021

The Breath Biopsy Conference 2022 is scheduled for 1^st-3^rd November. Click the button to express interest in the next Breath Biopsy Conference:

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Talk Abstract:

Chemi-resistive sensors used in breathalyzers have become a hotspot between the international breath research communities. These sensors exhibit a significant change in its resistance depending on the temperature it gets heated thus demanding high power leading to non-portable instrumentation. In this work, numerical simulation to identify the suitable combination of substrate and heater profile using COMSOL multiphysics was studied. Ni-Cr and Pt-100 joule resistive heater with various profiles were studied beneath the square and circular alumina substrates. The temperature distribution was uniform throughout the square substrate with the meander shaped pt100 heater with 48 mW power consumption for 200^oC. Moreover, this heater profile induced minimal stress on the substrate with 0.5 mm thick. A novel Graphene based ternary metal oxide nanocomposite (GO/SnO₂/TiO₂) was coated on the optimized substrate and heater to elucidate the response of diabetes biomarker (acetone). The sensor exhibited superior gas sensing performance towards acetone in the exhaled breath concentration range for diabetes (0.25 – 3 ppm). These results indicated the importance of substrate and heater properties along with sensing material for low power portable breathalyzers.

Speaker Biography:

Ramji Kalidoss is an Associate Professor at the Department of Biomedical Engineering, Bharath Institute of Higher Education and Research, India. He received his PhD in Biomedical Engineering in 2020 and received “Gandhian Young Technological Innovation Award 2020” from Ministry of Health and Family Welfare, India for his contribution to the development of breathalyzer to diagnose diabetes. His research interests include nanomaterial based chemi-resistive gas sensor towards the development of portable prototype. He has published 10 journal papers and authored 2 book chapters. He has guest edited 3 conference proceedings for Elsevier’s Materials Today: Proceedings, AIP Conference Proceedings and IOP Journal of Physics Conference series. His current research interest is on scaling up the clinical trial to validate the developed portable breathalyzer for diabetes diagnosis.

The Breath Biopsy Conference 2022 is scheduled for 1^st-3^rd November. Click the button to express interest in the next Breath Biopsy Conference:

Express Interest