Tobias received a B.S. from University of Tulsa, OK (2000), M.S. from University of Texas at Austin (2002) and PhD., University of Texas at Austin (2004).He served as Postdoctoral Research Fellow, MIT (2005) Postdoctoral Research Fellow, TU Eindhoven, and The Netherlands (2006-2007) before coming to Cornell.
There is a tremendous opportunity space for nanostructured materials to play a key role in next generation energy technologies. Our research efforts focus on the fundamental study of optoelectronic properties of semiconductor nanocrystals; this work is inspired by the potential application of these materials in solar energy conversion and energy storage devices. The semiconductor nanocrystals used in our work provide a diverse set of building blocks whose electronic and optical properties differ from their bulk counterparts due to the spatial wavefunction confinement. This quantum confinement effect allows us to engineer the materials properties through simple adjustments in nanocrystal size, shape, composition, and surface chemistry. In addition to their immense potential for technological applications, these materials also provide a material system to experimentally test fundamental quantum mechanical concepts.
Education and outreach are fully integrated with the research activities of our group. Our educational objectives are designed to: (1) integrate results from the research frontier and education of students and (2) capture the students enthusiasm and engagement in impending energy issues, encouraging their future contributions as the next generation of scientist and engineers. Serving as a faculty advisor to the new Cornell University Sustainable Design team and work with them to showcase prototype nanocrystal-based photovoltaics in the 'sustainable classroom', which will be built on campus to serve as a venue for educational activities for high-school science teachers and students. Asst Prof Hanrath is committed to integrating research and teaching is illustrated in efforts to modernize the undergraduate curriculum, for example by introducing a new nanotechnology senior 'product design' project. Undergraduate teaching responsibilities include ChemE 3130 (Equilibrium Thermodynamics) and project manager for ChemE4620 (Senior Process Design). Graduate teaching responsibilities include ChemE 7920 (Principles and Practices of Graduate Research), which includes a small workshop on research ethics to educate graduate students about the proper conduct of research, ranging from the writing of and review of manuscripts to day-to-day activities in the lab.
- 2012. "Interfaceinduced Nucleation, Orientational Alignment and Symmetry Transformations in Nanocube Superlattices." Nano Letters 12 (9): 4791-4798. .
- 2012. "Timing Matters: The Underappreciated Role of Temperature Ramp Rate for Shape Control and Reproducibility of Quantum Dot Synthesis." Nanoscale 4 (12): 3625-8. .
- 2012. "Comparing the Structural Stability of PbS Nanocrystals Assembled in fcc and bcc Superlattice Allotropes." Journal of the American Chemical Society 134 (26): 10787-10790. .
- 2012. "Bright Infrared Quantum-dot Light-emitting Diodes Through Inter-dot Spacing Control." Nature Nanotechnology 7 (6): 369-373. .
- 2012. "Colloidal nanocrystal quantum dot assemblies as artificial solids." Journal of Vacuum Science & Technology A-Vacuum Surfaces and Films 30 (3): 030802-030830. .
Selected Awards and Honors
- Faculty Early Career Development Award (National Science Foundation) 2011
- 3M non-tenured Faculty Award (3M) 2011
- Ben Streetman Prize for Outstanding Research in Electronic 2005
- George Kozmetsky Award for Outstanding Graduate 2004
- Robert A. Brown Outstanding Alumnus Fellowship in 2003
- BS (Chemical Engineering & Chemistry), University of Tulsa, 2000
- MS (Chemical Engineering), University of Texas at Austin, 2002
- Ph D (Chemical Engineering), University of Texas at Austin, 2004