Dept. of Chemistry

George Chumanov

Associate Professor
Analytical Chemistry

Phone: (864) 656-2339
Office: 116 Biosystems Research Complex
E-mail: gchumak@clemson.edu

Research Interests | Publications

Dr. Chumanov received his B.S at Moscow Engineering Physics Institute and his Ph.D. (1988) from Moscow State University with Prof. Edward Manykin working in the field of optics and spectroscopy of biomolecules. He was a Postdoctoral Associate at Iowa State University with Prof. T. M. Cotton were he conducted research in bioanalytical applications of Raman spectroscopy. In the last five years, Dr. Chumanov held Research Scientist I position at Ames Laboratory USDOE, where he studied photoinduced electron transfer processes at interfaces.

Research Interests

Dr. Chumanov's research consists of three parts: preparation and modification of different nanoparticles, including one-, two- and three-dimensional regular structures; investigation of their properties using different spectrochemical techniques together with optical, electron, atomic force and scanning tunneling microscopy; and development of new materials and devices for environmental and biomedical diagnostic applications. The focus is on the preparation, investigation and applications of materials reduced to nanosize (10-7­10-8 meters) dimensions.

Such nanomaterials exhibit remarkable chemical and physical properties, many of which have yet to be unveiled. The potential for discovering new principles, ideas and devices of significant practical value drives research in this field.

Dr. Chumanov's focus is on metal, metal/semiconductor and metal/dielectric hybrid nanoparticles, which exhibit unique optical properties due to the excitation of so-called plasmon resonances (plasmons). Plasmons can be effectively tuned by changing the size, shape, composition and local environment of nanoparticles. These characteristics make nanoparticles ideal building blocks for the next generation of optical materials, electronic and photonic devices.

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Publications

Chumanov, G., Picorel, R., Ortiz de Zarate, I., Seibert, M. and Cotton, T.M., "Resonance Raman and Surface-enhanced Resonance Raman Spectra of LHII Antenna Complex from Rhodobactor sphaeroides and Ectothiorhodospira sp. excited in the Qx and Qy Transitions,” Photochem. Photobiol., 71, 589-595 (2000).

Dutta, A., Smirnov, A. V., Wen, J., Chumanov, G., and Petrich, J. W., "Multidimensional reaction coordinate for the excited-state H-atom transfer in perylene quinones: importance of the 7-membered ring in hypocrellins A and B" Photochem. Photobiol., 71, 166-172, (2000).

Lin, S., Quaroni, L., White W. S., Cotton, S., and Chumanov, G., "Localization of Carotenoids in Plasma Low-Density Lipoproteins Studied by Surface-Enhanced Raman Spectroscopy", Biopolymers (Biospectroscopy), 57, 249-256 (2000).

Zheng, J. W., Ye, S. Y., Lu, T. H., Cotton, T. M., and Chumanov, G., "Circular Dichroism and Resonance Raman Comparative Studies of Wild Type Cytochrome c and F82H mutant", Biopolymers, 57, 77-84 (2000).

Walsh, R. J., Cotton, T. M., and Chumanov, G., "Silver Coated Porous Alumina as a New Substrate for Surface Enhanced Raman Spectroscopy", J. Raman Spect., 55, 1695-1700 (2001).

Malynych, S., Robuck, H., and Chumanov, G., "Fabrication of Two-Dimensional Assemblies of Ag Nanoparticles and Nanocavities in Poly(dimethylsiloxane) Resin", Nano Letters, 1, 647-649 (2001).

Zheng, J. W., Chumanov, G., and Cotton, T. M., "Photoinduced Electron Transfer at the Surface of Nanosized Silver Nanoparticles as Monitored by EPR spectroscopy", Chem. Phys. Lett., 349, 367-370 (2001).

Malynych, S., Luzinov, I., and Chumanov, G., "Poly(vinylpyridine) as a universal surface modifier for immobilization of nanoparticles", J. Phys. Chem., 106, 1280-1285 (2002).

Gering, J.P., Quaroni, L., and Chumanov, G., "Immobilization of Antibodies on Glass Surfaces Through Sugar Residues", J. Coll. Inter. Sci., 252, 50-56 (2002).

Junwei Zheng, Tianhong Lu, Therese M. Cotton and George Chumanov, “Photoelectrochemical reduction of CO2 mediated with methylviologen at roughened silver electrodes”, J. Electroanal. Chem. 518, 6-12 (2002).

Junwei Zheng, Qun Zhou, Yaoguo Zhou, Tianhong Lu, Therese M. Cotton and George “Chumanov Surface-enhanced resonance Raman spectroscopic study of yeast iso-1-cytochrome c and its mutant”, J. Electroanal. Chem. 530, 75-81 (2002).

Malynych S., Chumanov G. “Light-induced coherent interactions between silver nanoparticles in two-dimensional arrays”, JACS, 125, 2896-2898 (2003).

Malynych S., Chumanov G. “Vacuum Deposition of Silver Island Film on Chemically Modified Surfaces”, J. Vac. Sci. Technol. A, 21, 723-727 (2003).

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