个人简介

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; NSF Creativity Award, 2007

研究领域

Analytical Chemistry/Materials Chemistry/Nanoscience and Technology/Physical Chemistry/Surface and Interfacial Chemistry

Chemical Electronics. Organic and inorganic materials can be used as active components in solid state electronic devices. The most obvious application are solid state chemical sensors such as Chemically Sensitive Field-Effect Transistors (CHEMFET). They represent a versatile platform for creating well-defined chemical sensors and chemical sensing arrays for many gas phase monitoring applications. CHEMFETs are hybrid structures containing conventional silicon-based part, which is combined with electroactive material forming the chemically responsive gate. The principal mode of interaction of these materials with gases and vapors involves modulation of work function of the gate material. The main research thrust in this area is on design of novel sensing materials for the FET platform and on creation of integrated, chemical sensing arrays. A field-effect transistor configuration also allows investigation of equilibrium fluctuation of work function of organic semiconductors used as the gate materials. There is no other experimental technique that would allow such investigation. Magnetic Quartz Crystal Microbalance. When placed in a strong magnetic field (~ 1-3 Tesla) QCM coated with this layer of para or ferromagnetic materials exhibits major changes in its oscillatory behavior. They have been linked to changes of mechanical properties of the thin layer. This is a new experimental concept, which may lead to a new tool for investigation of thin magnetic films. Atomic Metals and Alloys. Polyaniline is the most widely used organic semiconductor. Among its unique properties belong its ability to strongly bind various halo-complexes. We have exploited that ability to use it as an isolation matrix for electrochemical synthesis of atomic metals and atomic alloys. Thus, unprotected, but isolated clusters of AuN (N=0-7) have been prepared and their properties predicted by quantum theory have been confirmed. Likewise, atomic alloys containing AuNPdM have been prepared and tested. Other binary and ternary atomic alloys are being investigated.

近期论文

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Graphene Bio-Field-Effect Transistor Myth. Janata, J. ECS Solid State Letters. 2012, 1, M29-M31. Odd-Even Pattern Observed in Polyaniline/(Au0 – Au8) Composites. Jonke, A., Josowicz, M., and Janata, J. Journal of the Electrochemical Society. 2012, 159, P40-P43. Polyaniline-Supported Atomic Gold Electrodes: Comparison with Macro Electrodes. Schwartz, I., Jonke, A., Josowicz, M., and Janata, J. Catalysis Letters. 2012, Polyaniline doped with atomic gold. Jonke, A., Josowicz, M., and Janata, J. Journal of the Electrochemical Society. 2011, 158(12), E147-E151. Magnetic Quartz Crystal Microbalance: Magnetoacoustic Parameters. Vavra, K., Yu, G., Josowicz, M., and Janata, J. Journal of Applied Physics. 2011, 110, 013905. Fluctuation Analysis of Work Function of Organic Semiconductors. West, R., Watts, C., Josowicz, M., and Janata, J. Collection of Czechoslovak Chemical Communications. 2011, 76, 843-858. Electrochemically Controlled Atom by Atom Deposition of Gold to Polyaniline. Jonke, A., Josowicz, M., and Janata, J. Journal of the Electrochemical Society. 2010, 157, P83-87. Label-free voltammetric detection method using individually addressable oligonucleotide microelectrode arrays. Josowicz, M., Kalantari, R., Cantor, R., Chen, H., Yu, G., and Janata, J. Analytical Chemistry. 2010, 82, 9028-9033. Principles of Chemical Sensors, 2nd Edition, Springer, New York. Janata, J. 2009, Potentiometry in gas phase. Janata, J. Collection of Czechoslovak Chemical Communications. 2009, 74, 1623-1634. Organic Semiconductors in Potentiometric Gas Sensors. Janata, J., and Josowicz, M. Journal of Solid State Electrochemistry. 2009, 13, 41-49. Nickel-63 Microirradiator. Steeb, J., Josowicz, M., and Janata, J. Analytical Chemistry. 2009, 81, 1976-1981. Sensing Array for Coherence Analysis of Modulated Chemical Plume. Cantor, R., Ishida, H., and Janata, J. Analytical Chemistry. 2008, 80, 1012-1018. Chemically Sensitive Field-Effect Transistor with Polyaniline-Ionic Liquid Composite Gate. Saheb, A., Josowicz, M., and Janata, J. Analytical Chemistry. 2008, 80, 4214-4219. Controlling Size Of Gold Clusters In Polyaniline From Top Down And From Bottom Up. Saheb, A., Smith, J., Josowicz, M., Baer, D., and Engelhard, M. Journal of Electroanalytical Chemistry. 2008, 621, 238-244. Magnetic Quartz Crystal Microbalance: A Multi-layer Gold/Nickel Stack. Yu, G., and Janata, J. Journal of Applied Physics. 2008, 104, 043908. Study Of Electric Field-Modulation In Organic Field-Effect Transistors. Chen, H., Rambathla, A., Potje-Kamloth, K., and Janata, J. Journal of the Electrochemical Society. 2007, 154, H453. Slow solvation dynamics of water/nitrobenzene system. Moakes, G., and Janata, J. Accounts of Chemical Research. 2007, 40, 720-728. Stabilization of electronic properties of (1R)-(-)-10-camphorsulfonic acid doped polyaniline by UV irradiation. Sasaki, I., Janata, J., and Josowicz, M. Polymer Degradation and Stability. 2007, 92, 1408. Magnetic Quartz Crystal Microbalance. Yu, G., Josowicz, M., Hunt, W., and Janata, J. Review of Scientific Instruments. 2007, 78, 065111-1.