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Venkat Bhethanabotla

Venkat Bhethanabotla

Professor, Chemical Engineering, University of South Florida

Phone: (813) 974-2116

Fax: (813) 974-3651

College of Engineering
4202 East Fowler Avenue
Tampa, FL 33620



Ph.D., Pennsylvania State University, 1987

Research Interests:

The primary goal of our research group is to develop the fundamental science and application technology for the sensor system components that are common to the platforms which can meet significant sensing needs such as for medical diagnostics, national defense and energy security. Current focus is on acoustic wave devices for these applications. The sensing principle in these devices is the perturbation of elastic waves in solids by environmental variables, and its recognition by suitable electronics. A variety of these acoustic waves at radio frequencies are excited in various piezoelectric materials in our laboratory using suitably designed micro-fabricated electrodes. These transducers are functionalized with sensing layers that interact with analytes to form selective, sensitive, fast-responding and robust sensors. Our recent successes include palladium and palladium-alloy functionalized single walled carbon nanotube (Pd-SWNT) interfaces to a Rayleigh surface acoustic wave transducer for superior hydrogen sensing, a polymer functionalized, high frequency thickness shear mode (TSM) transducer for organic vapor detection and process monitoring, and a hexagonal transducer that propagates guided shear horizontal surface acoustic waves in one direction while propagating waves with substantial shear vertical components in others to achieve differential sensing of multiple biomarkers, for applications to ovarian cancer and trauma biomarker sensing.

Publications List:

  • Chaudhari, A., Ortiz, O., Bhansali, S., and Bhethanabotla, V.R., "Sensitive, Selective & Fast Responding Surface Acoustic Wave Sensor For Hydrogen," Florida Chapter of the American Vacuum Society and Florida Society for Microscopy - 2003 Annual Symposium, March 17-20, 2003, University of Central Florida, Orlando, Florida.
  • Srinivasagupta, D., Ortiz, O., Bhansali, S., Bhethanabotla, V.R., and Joseph, B., "Palladium Nanowire Synthesis on Graphite Electrode Step-Edges via Electrodeposition: Molecular Modeling and Experimentation", 204th Meeting of The Electrochemical Society, Orlando, Florida, October 12-17, 2003.
  • Chaudhari, A., Srinivasagupta, D., Chennapragada, P., Bhethanabotla, V.R., and Joseph, B., "Development of Surface Acoustic Wave Sensors Using Nanostructured Sensing Materials for Gas Detection", AICHE 2003 Annual Meeting, San Francisco.