My research in the Krauss group investigates the charge properties of two-dimensionally quantum confined semiconductor systems. We synthesize cadmium selenide quantum rods using an arrested precipitation organometallic process. We then characterize the particles using a variety of techniques including optical absorbance and fluorescence, transmission electron microscopy and atomic force microscopy. We study the photoionization and dipolar properties of the cadmium selenide using a modified atomic force microscopy technique called electrostatic force microscopy, which measures coulombic and capacative forces between nanomaterials and a specially prepared AFM tip. The eventual goal is the correlation of the optical properties to these charge effects.
Additional Particle Information
Krauss, T.D.; Wise, F.W. "Coherent Acoustic Phonons in a Semiconductor Quantum Dot," Phys. Rev. Lett. 1997, 79, 5102. Krauss, T.D.; Brus, L.E. "Charge, Polarizability, and Photoionization of Single Semiconductor Nanocrystals," Phys. Rev. Lett. 1999, 83, 4840. Du, H.; Chen, C.; Krishnan, R.; Krauss, T. D.; Harbold, J. M.; Wise, F. W.; Thomas, M. G.; Silcox, J. "Optical Properties of Colloidal PbSe Nanocrystals" Nano Lett. 2002, 2(11), 1321. Haremza, J. M.; Hahn, M. A.; Krauss, T. D.; Chen, S.;