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Omowunmi "Wunmi" Sadik
Professor of Bioanalytical, Materials  & Environmental Chemistry

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Chair, 1st Gordon Research Conferences on Environmental Nanotechnology



Department of Chemistry
State University of New York at Binghamton
Binghamton, NY 13902

Phone:  (607) 777-4132
Fax:     (607) 777-4478

Lab:     (607) 777-6392



  • Sabbatical, Harvard University (2003)
  • Senior Visiting Research Fellow, Cornell University, (2002)
  • Visiting Research Scientist, Naval Research Laboratories (2001)
  • NRC Postdoctoral Fellow, US-Environmental Protection Agency
  • Ph.D., University of Wollongong, Australia




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, nucleic acids, 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 conducting polymers and biodegradable membranes. 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 that use complementary physical, chemical, and biological phenomena to measure orthogonal characteristics of chemical or biological species of interest.






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  • Mohammadifar, M.; Yazgan, I.; Zhang, J.; Kariuki, V.; Sadik, O. A.; Choi, S. Green Biobatteries: Hybrid Paper-Polymer Microbial Fuel Cells. Adv. Sustain. Syst. 2018, 2 (10), 1800041.

  • Yazgan, I.; Zhang, J.; Kariuki, V.; Akgul, A. A.; Cronmiller, L. E.; Akgul, A. A.; Osonga, F.; McMahon, A.; Gao, Y.; Eshun, G.; et al. Selective Sensing and Imaging of Penicillium Italicum Spores and Hyphae Using Carbohydrate–Lectin Interactions. ACS Sensors 2018, 3 (3), 648–654.
  • Osonga, F. J.; Le, P.; Luther, D.; Sakhaee, L.; Sadik, O. A. Water-Based Synthesis of Gold and Silver Nanoparticles with Cuboidal and Spherical Shapes Using Luteolin Tetraphosphate at Room Temperature. Environ. Sci. Nano 2018, 5 (4), 917–932.
  • Osonga, F. J.; Onyango, J. O.; Mwilu, S. K.; Noah, N. M.; Schulte, J. J. J.; An, M.; Sadik, O. A. Synthesis and Characterization of Novel Flavonoid Derivatives via Sequential Phosphorylation of Quercetin. Tetrahedron Lett. 2017, 58 (15), 1474–1479.
  •  Kariuki, V. M.; Hoffmeier, J. C.; Yazgan, I.; Sadik, O. A. Seedless Synthesis and SERS Characterization of Multi-Branched Gold Nanoflowers Using Water Soluble Polymers. Nanoscale 2017, 9 (24), 8330–8340.
  •  Xiang, K.; Li, Y.; Ford, W.; Land, W.; Schaffer, J. D.; Congdon, R.; Zhang, J.; Sadik, O. Automated Analysis of Food-Borne Pathogens Using a Novel Microbial Cell Culture, Sensing and Classification System. Analyst 2016, 141 (4), 1472–1482.
  • Kariuki, V. M.; Panetier, J. A.; Schulte, J.; Sadik, O. A. Directional Templating Mechanisms of Anisotropic Nanoparticles Using Poly(Pyromellitic Dianhydride- p -Phenylenediamine). J. Phys. Chem. C 2016, 120 (37), 21027–21036.
  •  Kariuki V., Yazgan I., Akgul A., Kowal A., Parlinska M., Sadik O. Synthesis, Catalytic and Biological Evaluation of Gold and Silver Nanoparticles using Poly(amic) Acid, Environmental Science: Nano, 2015, 2, 518 – 527.
  • Idris Yazgan, Naumih M. Noah, Ousmane Toure, Siyi Zhang and Omowunmi A. Sadik, Biosensors & Bioelectronics, 61, 266-273, 2014.
  • Sadik O. A., Du N., Kariuki V., Okello V., &   Bushlyar V., ACS Sustainable Chemistry & Engineering, 2, 1707-1716, 2014 .
  • Veronica A. Okello, Ailing Zhou, Jane Chong, Michael T. Knipfing, David Doetschman & Omowunmi A. Sadik, Environmental Science & Technology, 46 (19),  10743–10751, 2012.  
  • Marcells Omole, Veronica Okello, Vincent Lee, Lisa Zhou and Omowunmi Sadik, ACS Catalysis, 1, 139-146, 2011.
  • Kikandi S. K., Wong Q., Okello V., Sadik O. A., Varner V. E., Burns S., Environmental Science & Technology, 45(2), 5294-5300, 2011.
  • Du N., Wong C., Feurstein, M., Sadik O., Umbach C., Sammakia B., Langmuir, 26, 14194-14202, 2010.
  • Samuel K. Mwilu, Austin O. Aluoch,  Seth Miller,  Paula Wong & Omowunmi A. Sadik, Alim Fatah, Richard Arcilesi, Analytical Chemistry, 81, 7561-7570, 2009.
  • Sadik O. A., Zhou Ailing, Aluoch A., Biosensors & Bioelectronics, 24, 2749-2765, 2009.
  • A. Zhou, S. Kikandi, O. A. Sadik, Electrochemistry Communications 9, 2247–2256, 2007.
  • Breimer M.,  Yevgheny E., Sadik O. A., Nano Letters, 1 (6), 305, 2001.

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The Sadik Group Acknowledges the following agencies for financial support.




© Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902-6000