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| Born Nancy, France, 1961. |
| Ingenieur de l'Ecole Polytechnique, Paliseau, France, 1983. |
| Diplome d'Etude Approfondie, Orsay, France, 1984. |
| University of California, Berkeley, Ph.D., 1987. |
| Research Scientist, Universitè Paris-Sud, Orsay, France, 1988-91. |
| The University of Chicago, Professor, 1991- |
| Joint Appointment in the Department of Physics. |
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| Accolades |
| 2002 Fellow, American Physical Society |
| 1992 David and Lucile Packard Fellow. |
| 1990 Prix National des Lasers, Sociètè Française de Physique. |
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| Philippe Guyot-Sionnest |
| Professor |
| Office: | 929 E. 57th St., GCIS E 111, Chicago, IL 60637 |
| Phone: | (773)702-7461 | Fax: | (773)702-5863 |
| Email: | pgs@uchicago.edu |
| Web: | none |
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| Research Interests: |
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| Quantum Confined Semiconductors |
Delocalized electronic wavefunctions are readily achievable in semiconductor quantum dots, such as semiconductor nanocrystal colloids. This leads to extraordinary optical properties, which may lead to applications ranging from full-color displays, to photo-electrochemical cells. We synthesize semiconductor nanocrystals, and control their sizes and their surfaces. Microscopy and nonlinear spectroscopy are used to study the basic aspects of electron dynamics and interaction in strongly confined structures. We currently focus on the doping of nanocrystals and the very unusual infrared response, e.g. electrochromic, as well as the potentially novel electrical transport properties in films made of these artificial atoms.
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| Molecular Electronics |
| Organic materials will be at the basis of increasingly many devices, however, electronic conduction in organic molecules, though fascinating, is poorly understood, and so is the mechanisms for molecular ordering of SAMs. This drives the second topic of research. Using low-impedance and low-temperature STM, imaging and transport studies of individual or monolayers of organic molecules are performed. The goal of this research is to gain an understanding of conduction in organic molecules which should uncover novel concepts. We are particularly interested in electronic nonlinearities relying on donor-acceptor or electron-vibration coupling. |
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| Selected References |
Intraband relaxation in CdSe nanocrystals and the strong influence of the surface ligands
J. Chem. Phys. 123, 074709 (2005) |
| Variable range hopping conduction in semiconductor nanocrystal solids, Phys. Rev. Lett. 92, 216802 (2004) |
| Synthesis and optical characterization of Au/Ag core/shell nanorods, J. Phys. Chem. B 108, 5882 (2004) |
| Light emission and amplification in charged CdSe quantum dots, J. Phys. Chem. B 108, 9027, (2004) |
| Interband and Intraband Optical Studies of PbSe Colloidal Quantum Dots, J. Phys. Chem. B106, 10634, 2002 |
| Conducting n-type CdSe Nanocrystal solids, Science 300, 1277 (2003) |
| Electrochromic nanocrystal quantum dots, Science, 201, 2390 (2001) |
| N-type colloidal semiconductor nanocrystals, Nature, 407, 981 (2000). |
| Intraband Transitions in Semiconductor Nanocrystals. Appl. Phys. Lett. 72, 686 (1998) |
| Self Assembled Molecular Rectifiers. J. Chem. Phys. 106, 5249 (1997). |
| Dielectric Dispersion of CdSe Nanocrystals Colloids: Observation of a Permanent Dipole Moment. Phys. Rev. Lett. 79, 865 (1997). |
| Synthesis and characterization of strongly luminescing ZnS-Capped CdSe nanocrystals, J. Phys. Chem. 100, 468 (1996). |
| Self-Assembly of Conjugated Molecular Rods: A High-Resolution STM Study. J. Am. Chem. Soc. 118, 3319 (1996). |
| Photoluminescence of Single Semiconductor Nanocrystallites by Two-Photon Excitation Microscopy. Chem. Phys. Lett. 229, 317 (1994). |
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Physical Chemistry 