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Omowunmi A. Sadik

Dr. Omowunmi A. Sadik

Professor of Bioanalytical and Environmental Chemistry

Science 2 Bldg - Room 708
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Research Interests:

A core objective of my research program is to understand the mechanism of the transduction of chemical information at interfaces, and to use this knowledge in the pursuit of innovative biosensing technologies, functional materials and devices. A sensor is a device that responds to physical, chemical or biological quantity, and converts that quantity into a signal or an output. The driving force behind my biosensor research is the need to build sensor systems that quantitatively measure target species in a complex system. I have developed innovative biosensors for ultrasensitive detection of Staphylococci Enterotoxin B (SEB), biofilm, DNA mismatch, pain biomarkers, oral proteins, E. coli, Bacillus globigii, chromium VI, polychlorinated biphenyls, environmental pollutants and toxic metals.

Aside from biosensors, I have also established a world-class research in functional materials. Examples include polyphenols, polyamic acid nanomembranes, polyoxy-dianilines, and sequestered metal nanoparticles within electroconducting polypyrrole. I have been recognized for my research and development of nano-bioanalytical detection platforms for environmental and biological monitoring. Our current sensors incorporate transducers and sustainable membranes utilizing complementary physical, chemical, and biological phenomena to measure orthogonal characteristics of chemical or biological species of interest.

Selected Publications:

Zheng, L.Y.; Congdon, R.B.; Sadik, O.A.; Marques, C.N.H.; Davies, D.G.; Sammakia, B.G.; Lesperance, L.M.; Turner, J.N. Electrochemical Measurements of Biofilm Development using Polypyrrole-enhanced Flexible Sensors, Sensors & Actuators: B. Chemical, vol. 182 June, 725-732, 2013.

Veronica A. Okello, Ailing Zhou, Jane Chong, Michael T. Knipfing, David Doetschman & Omowunmi A. Sadik, Reduction of Hexavalent Chromium using Naturally-derived Flavonoids, Environmental Science & Technology, 46 (19), 10743–10751, 2012.

Marcells Omole, Veronica Okello, Vincent Lee, Lisa Zhou and Omowunmi Sadik, Catalytic Reduction of Hexavalent Chromium using Nanostructured Polyamic Acid, ACS Catalysis, 1, 139-146, 2011.

Kikandi S. K., Wong Q., Okello V., Sadik O. A., Varner V. E., Burns S., Size-exclusive Nanosensor for Quantitative Analysis of Fullerene Nanomaterials, Environmental Science & Technology, 45(2), 5294-5300, 2011.

Du N., Wong C., Feurstein, M., Sadik O., Umbach C., Sammakia B., Flexible Conducting Polymers: Effects of Chemical Composition on Structural, Electrochemical and Mechanical Properties, Langmuir, 26, 14194-14202, 2010.

Samuel K. Mwilu, Austin O. Aluoch, Seth Miller, Paula Wong & Omowunmi A. Sadik, Alim Fatah, Richard Arcilesi, Identification and Quantitation of Bacillus globigii using Metal-enhanced electrochemical detection and capillary biosensor, Analytical Chemistry, 81, 7561-7570, 2009.

Sadik O. A., Zhou Ailing, Aluoch A., Status of Biomolecular Recognition using Electrochemical Techniques,  Biosensors & Bioelectronics, 24, 2749-2765, 2009.

Zhou A. Sadik O. A., Comparative analysis of quercetin oxidation by electrochemical, Enzymatic, Air oxidation, enzymatic and free-radical oxidation: A mechanistic study, Journal of Agricultural & Food Chemistry, 56(24), 12081–12091, 2008.

Zhou, S. Kikandi, O. A. Sadik, “Electrochemical Degradation of Quercetin: Isolation and Structural Elucidation of the Degradation Products”, Electrochemistry Communications, 9, 2247–2256, 2007.

Jason Karasinski, Silvana Andreescu, Leslie White, Yachao Zhang and Omowunmi A. Sadik, Barry K. Lavine and Mehul Vora, Detection and Identification of Bacteria using Antibiotic Susceptibility and a Multiarray Electrochemical Sensor with Pattern Recognition, Biosensors & Bioelectronics, 22, 2646-2649, 2007.

Breimer M., Yevgheny E., Sadik O. A., “Incorporation of Metal Particles in Polymerized Organic Conducting Polymers - A Mechanistic Insight,” Nano Letters, 1 (6), 305, 2001.

Zhou, S. Kikandi, O. A. Sadik, “Electrochemical Degradation of Quercetin: Isolation and Structural Elucidation of the Degradation Products”, Electrochemistry Communications, 9, 2247–2256, 2007.

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Last Updated: 1/25/14