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Jiri JanataProfessor and Eminent Scholar in Sensors and Instrumentation Office: 1-24 Boggs Phone: 404-894-4828 Fax: 404-894-7452 NSF Workshop - The New Challenges of Chemical and Biological Sensing |
M.Sc., The Charles University, Prague, 1961; Ph.D., The Charles University, Prague, 1965
Alexander von Humboldt Senior Scientist Prize 1987; Heyrovsky Medal, Czechoslovak Academy of Sciences, 1990; Recipient of Outstanding Achievement Award, Electrochemical Society; appointed as Georgia Research Alliance Eminent Scholar - 1996, elected Honorary member of the Czech Learned Society - 2001; Search for Electroactive Materials: 2003 Award
Research Interests
Work Function of Organic Semiconductors. Work function is one of the most fundamental properties of materials. We have found that it can be modulated by interaction with electrically neutral molecules. This effect can be measured by Kelvin probe, by field-effect transistors and by uv-vis and infrared spectroscopy. The research involves electrochemical synthesis and spectroscopic characterization of organic semiconductors and tuning of the selectivity of the guest molecule/semiconductor interaction either chemically or electrochemically. Special skills required are electrochemistry and instrumentation analytical techniques.
Higher Order Chemical Sensing Arrays. This research area builds on the work function research described above. The aim is to fabricate in silicon arrays of chemical sensors in which more than one transduction principle is employed. For example, work function modulation (vide supra) and impedance and mass modulation. Such arrays can be seen as sensor analogs of "hyphenated analytical techniques." The research involves design, fabrication, and testing of integrated chemical sensors, selective layer deposition, encapsulation and packaging. The special skills required in this materials science and analytical chemistry.
Chemical Plume Tracking. Aquatic animals have developed strategies for locating source of chemicals (food, mates, etc.). The goal of this research is to use chemical sensing arrays to navigate in chemical plumes in order to find the source. This project has strong environmental component. The special skills required include electroanalytical chemistry and Fourier analysis of fluctuating signals.
Representative Publications
G. Y. Yu, W. D. Hunt, M. Josowicz, J. Janata, Development of a magnetic quartz crystal microbalance, Review of Scientific Instruments, 2007, 78(6), 065111/1-065111/6.
I. Sasaki, J. Janata, M. Josowicz, Stabilization of electronic properties of (1R)-(-)-10-camphorsulfonic acid doped polyaniline by UV irradiation, Polymer Degradation and Stability, 2007, 92(7), 1408-1416.
H. Chen, A. Rambhatla, J. Janata, K. Potje-Kamloth, Study of Electric Field Modulation in Organic Field-Effect Transistors, Journal of the Electrochemical Society, 2007, 154(5), H354-H360.
A. Saheb, J. Janata, M. Josowicz, Reference electrode for ionic liquids, Electroanalysis, 2007, 19(11), 1222.
G. Moakes, J. Janata, Slow Solvation Dynamics of a Water-Nitrobenzene System, Accounts of Chemical Research ACS ASAP, 2007.
G. Moakes, L. L. Daemen, L. T. Gelbaum, J. Leisen, V. Marecek, J. Janata, Self-Organization of Water in Lithium/Nitrobenzene System, Journal of Physical Chemistry B, 2007, 111(25), 7312-7317.
I. Sasaki, M. Josowicz, J. Janata, Study of selective layer for HCN sensing, Electroanalysis, 2007, 19(1), 37-42.
I. Sasaki, J. Janata, A. Glezer, Fast gas sensing using an integrated synthetic jet actuator, IEEE Sensors Journal, 2006, 6(6), 1728-1733.
G. Moakes, L. T. Gelbaum, J. Leisen, J. Janata, V. Marecek, Solvation dynamics of lithium salts in wet nitrobenzene, Journal of Electroanalytical Chemistry, 2006, 593(1-2), 111-118.
J. Janata, Preface, Journal of Electroanalytical Chemistry, 2006, 593(1-2), 1-2
T. Aiyejorun, J. Kowalik, J. Janata, M. Josowicz, Label-free detection of DNA hybridization by cyclic voltammetry: An advanced undergraduate analytical chemistry laboratory experiment, Journal of Chemical Education, 2006, 83(8), 1208-1211.
I. Sasaki, M. Josowicz, J. Janata, A. Glezer, Enhanced performance of a filter-sensor system, Analyst (Cambridge, United Kingdom), 2006, 131(6), 751-756.
L. B. Roberson, B. Patel, J. Kowalik, L. M. Tolbert, Z. Zhou, J. Janata, From common to individual gate MOS OfETs. A platform for high-throughput, reusable organic/polymer semiconductor mobility screening, PMSE Preprints, 2006, 94 739-740.
A. Saheb, J. Janata, M. Josowicz, Reference electrode for ionic liquids, Electroanalysis, 2006, 18(4), 405-409.
J. Summerour, Y. Chen, M. Josowicz, T. M. Orlando, J. Janata, A. Paulenova, A beta microirradiator, Radiation Physics and Chemistry, 2006, 75(3), 369-374.
J. Hartung, J. Kowalik, C. Kranz, J. Janata, M. Josowicz, A. Sinha, K. McCoy, Electropolymerization of bilayer with phosphonic acid tethers for immobilization of biomolecules, Journal of the Electrochemical Society, 2005, 152(11), E345-E350.
J. A. Smith, M. Josowicz, M. Engelhard, D. R. Baer, J. Janata, Gold-polyaniline composites. Part II. Effects of nanometer sized particles, Physical Chemistry Chemical Physics, 2005, 7(20), 3619-3625.
J. A. Smith, M. Josowicz, J. Janata, Gold-polyaniline composite. Part I. Moving electrochemical interface, Physical Chemistry Chemical Physics, 2005, 7(20), 3614-3618.
G. Moakes, Leslie T. Gelbaum, Johannes Leisen and Jiri Janata, "NMR study of lithium ion in nitrobenzene/water system," Farad. Disc., 2005, 129, 81-97.
Greg Moakes, Lawrence A. Bottomley and Jiri Janata, "Doping of Glass with Lithium Ion," Anal. Chem., 2005, 77, 1106-1110.
F. L'Hereec, Hang Chen, Zhipin Zhou and J. Janata, "New Platform for Testing Organic Field-Effect Transistors," J. Phys. Chem. B, 2004, 108, 9042-9047.
Hang Chen, Mira Josowicz, Karin Potje-Kamloth and Jiri Janata, "Chemical Effects in Organic Electronics," Chem. Materials, 2004, 16, 4728-4735.
J. Janata, "Thirty Years of CHEMFETs," Electroanalysis, 2004, 16, 18311835.
L. A. Thompson, J. Kowalik, M. Josowicz and J. Janata, "Label-free DNA Hybridization Sensor Based on a Conducting Polymer," J. Am. Chem. Soc., 2003, 125, 324-325.
J. Janata, "Electrochemical Microsensors," Proc. IEEE, 2003, 91, 864-869 .
J. Janata and M. Josowicz, "Conducting polymers in electronic chemical sensors," Nature Materials, 2003, 2 (1), 19-24.
J. A.Smith, M. Josowicz and J. Janata, "Polyaniline-Gold Nanocomposite System," J. Electrochem. Soc. , 2003, 150, E384-388.
J. Janata, "Organic Semiconductors in Molecular Electronics,"
Phys. Chem. Chem. Phys., 2003, 5, 5155-5158 .
T. Kikas, H. Ishida, P. Janata and J. Janata, "Chemical Plume Tracking, Part III: Ascorbic Acid - a Viable Biological Marker," Anal. Chem. 2002, 74, 3605-3610.
J. Janata and M. Josowicz, "Conducting Polymers in Electronic Chemical Sensors," Nature Materials 2003, 2 (1), 19-24.
L. A. Thompson, J. Kowalik, M. Josowicz and J. Janata, "Label-free DNA Hybridization Sensor Based on a Conducting Polymer," J. Am. Chem. Soc. 2003, 125, 324-325.
Guofeng Li, Mira Josowicz and Jiri Janata, "Electrochemical Wiring with Conducting Polymer Films," Electrochem. Solid State Lett. 2002, 5, D5-D8.
B. Polk, K. Potje-Kamloth, M. Josowicz and J. Janata, "Role of Protonic and Charge Transfer Doping in Solid-State Polyaniline," J. Phys. Chem. 2002, 106, 11457-62.
Karin Potje-Kamloth, Brian J. Polk, Mira Josowicz and Jiri Janata, "Doping of Polyaniline in Solid-State with Photogenerated Triflic Acid," Chem.Materials 2002, 14, 2782-2787.
M. J. Weissburg, D. B. Dusenbery, H. Ishida, J. Janata, T. Keller, P. J. W. Roberts, and D. R. Webster, "A Multidisciplinary Study of Spatial and Temporal Scales Containing Information in Turbulent Chemical Plume Tracking," Environmental Fluid Mechanics 2 2002, 65-94 .