Dmitri Talapin Associate Professor
Born Minsk, Belarus, 1975.
Belarusian State University, Minsk, Diploma 1996.
University of Hamburg, Germany, Ph.D. 2002.
IBM T. J. Watson Research Center, Yorktown Heights, NY, Postdoctoral Fellow, 2003-2005.
The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, Staff Scientist 2005-2007.
University of Chicago, Assistant Professor 2007-2011; Associate Professor 2011-.
2011 Materials Research Society Outstanding Young Investigator Award.
2011 Ranked #21 among top 100 most cited chemists of the past decade by Thompson Reuters.
2010 Camille Dreyfus Teacher-Scholar Award.
2009 The David and Lucile Packard Fellowship.
2009 Sloan Fellowship.
2008 NSF CAREER Award.
2007 LMUexcellent Fellowship, Germany.
2004 IBM Invention Achievement Award.
1996 Diploma with Honors, Belarusian State University.
1995 National Academy of Science Student Award.
1994 ISF (International Soros Foundation) Fellowship.
1991 1st Prize of the USSR Chemistry Olympiad.
OFFICE: 929 E. 57th St., GCIS E 205, Chicago, IL 60637
Group Webpage: http://talapinlab.uchicago.edu
Our research focuses on chemistry, physics and material science of inorganic nanostructures. By combining expertise in colloidal synthesis, self-assembly and characterization of nanomaterial properties our group creates novel materials for electronic, photovoltaic, thermoelectric and catalytic applications.
Colloidal synthesis of inorganic nanostructures is developing into a new branch of synthetic chemistry. Starting with preparations of simple objects like spherical nanoparticles, the field is now moving toward more and more sophisticated structures where composition, size, shape and connectivity of multiple parts of a multicomponent structure can be tailored in an independent and predictable manner.
Examples of semiconductor and magnetic nanomaterials synthesized by colloidal chemistry techniques.
Inspired by the way most solids form in nature, with individual atoms or molecules assembling themselves into rigid, highly uniform arrays, we study assembly of monodisperse nanocrystals into ordered superstructures. Assembling nanoscale functional building blocks provides a powerful modular approach to the design of novel materials and ‘metamaterials’ with programmable physical and chemical properties.
Self-assembly of monodisperse nanocrystals into ordered superlattices and “crystals” constructed from functional nanocrystal building blocks.
Bringing together compounds of intrinsically different functionality constitutes a particularly powerful route to creating novel functional materials with synergetic properties found in neither of the constituents. Binary nanoparticle superlattices (BNSL) self-assembled from different combinations of semiconductor, magnetic, metallic and dielectric nanocrystals show amazing structural diversity. The range of materials which can be used as building blocks in BNSL structures seems to be limited only by our ability to make a particular material in form of monodisperse nanoparticles. Self-assembly of functional nanoparticles into single- and multicomponent superlattices offers nearly endless possibilities for creating novel materials for a range of applications from photovoltaic and thermoelectric devices to non-linear optics, multiferroics and multicomponent catalysts. However, we have very limited understanding of the processes which govern BNSL formation and determine stability of different structures. We investigate the fundamental aspects of self-assembly in the nanoworld.
Binary nanoparticle superlattices self-assembled from different combinations of semiconductor, magnetic, metallic and dielectric nanocrystals show amazing structural diversity. The insets show sketches of the superlattice unit cells.
Nanocrystal superlattices constitute a novel type of condensed matter whose properties originate both from the properties of individual nanocrystals and the collective phenomena caused by the crosstalk of the superlattice building blocks. We study electronic properties (carrier mobility, doping, charge transport mechanism, photoconductivity, thermopower) and heat transport in single- and multicomponent nanocrystal solids. The knowledge obtained from fundamental studies of nanocrystal assemblies will be used for development of practical solution-processed devices utilizing nanocrystals and nanocrystal assemblies. Performance of printable nanocrystal transistors compares favorably with devices based on organic molecules and conducting polymers. The nanocrystal field effect transistors allow reversible switching between n- and p-transport, providing options for printable complementary metal oxide semiconductor (CMOS) circuits and p-n junctions.
Self-assembled nanocrystal solids can be used for designing novel electronic, photovoltaic and thermoelectric devices. An example shows n-type Field Effect Transistors assembled from PbSe nanocrystals.
Selected Scholarly Publications
J.-S. Lee, M. V. Kovalenko, J. Huang, D.-S. Chung, D. V. Talapin. "Band-like Transport, High Electron Mobility and High Photoconductivity in All-inorganic Nanocrystal Arrays." Nature Nanotech, 6, 348 (2011).
N. J. Borys, M. J. Walter, J. Huang, D. V. Talapin, J. M. Lupton. "The Role of Particle Morphology in Interfacial Energy Transfer in CdSe/CdS Heterostructure Nanocrystals." Science, 330, 1371 (2010).
M. I. Bodnarchuk, M. V. Kovalenko, W. Heiss, D. V. Talapin. "Energetic and Entropic Contributions to Self-assembly of Binary Nanocrystal Superlattices: Temperature as the Structure-directing Factor." J. Am. Chem. Soc., 132, 11967 (2010).
J.-S. Lee, M. I. Bodnarchuk, E. V. Shevchenko, D. V. Talapin. "Magnet-in-the-Semiconductor FePt-PbS and FePt-PbSe Nanostructures: Magnetic Properties, Charge Transport and Magnetoresistance." J. Am. Chem. Soc., 132, 6382 (2010).
M. V. Kovalenko, M. Scheele, D. V. Talapin. "Colloidal Nanocrystals with Molecular Metal Chalcogenide Surface Ligands." Science, 324, 1417 (2009).
D. V. Talapin, E. V. Shevchenko, M. I. Bodnarchuk, X. Ye, J. Chen, C. B. Murray. "Quasicrystalline Order in Self-assembled Binary Nanoparticle Superlattices." Nature 461, 964 (2009).
J.-S. Lee, E. V. Shevchenko, D. V. Talapin. “Au-PbS Core-Shell Nanocrystals: Plasmonic Absorption Enhancement and Electrical Doping via Interparticle Charge Transfer.” J. Am. Chem. Soc., 130, 9673-9675 (2008).
M. V. Kovalenko, W. Heiss, E. V. Shevchenko, J.-S. Lee, H. Schwinghammer, A. P. Alivisatos, D. V. Talapin. “SnTe nanocrystals: A New Example of Narrow Gap Semiconductor Quantum Dots.” J. Am. Chem. Soc., 129, 11354-11355 (2007).
D. V. Talapin, J. H. Nelson, E. V. Shevchenko, S. Aloni, B. Sadtler, A. P. Alivisatos. "Seeded Growth of Highly Luminescent CdSe/CdS Nanoheterostructures with Rod and Tetrapod Morphologies. Nano Lett., 7, 2951 (2007).
E.V. Shevchenko, D.V. Talapin, N.A. Kotov, S. O’Brien, C.B. Murray. "Structural Diversity in Binary Nanoparticle Superlattices." Nature, 439, 55, (2006).
D. V. Talapin, C. B. Murray. "PbSe Nanocrystal Solids for n- and p-Channel Thin Film Field-Effect Transistors." Science, 310, 86, (2005).