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Jeffrey M. Pietryga

Phone: 505-667-2484
Email: pietryga@lanl.gov

Education

• 2002: Ph.D. Inorganic Chemistry, University of Texas at Austin
• 1997: B.S. Chemistry, University of Michigan - Flint

Professional Career

• 2007 - present, Technical Staff Member, Los Alamos National Laboratory
• 2005-2007, Intelligence Community Postdoctoral Research Fellow, Los Alamos National Laboratory
• 2003 - 2005, Postdoctoral Fellow, Los Alamos National Laboratory

Current Research

I lead the Quantum Dot Team's efforts in colloidal nanomaterial synthesis. This includes the development and refinement of syntheses of semiconductor, metal and hybrid nanocrystals for applications ranging from photovoltaics and sensors, to light-emitting diodes and lasers. Our team is especially focused on the synthesis of complex nanostructures, including heterostructured, shape-controlled and impurity-doped nanocrystals, that display advanced physical phenomena and unique regimes of carrier control, particularly within optoelectronic devices. Areas of current interest include:

• Narrow band-gap semiconductor nanocrystals for use in "Third Generation" solar cells
• Heterostructured semiconductor nanocrystals that demonstrate unique carrier behavior regimes, such as ultra-long single-exciton lifetimes and suppressed Auger recombination
• Semiconductor nanocrystals and nanoheterostructures doped with metal impurities to create novel magnetic, optical and magneto-optical functionality
• Metal and semiconductor nanorods and platelets
• Hybrid metal/dielectric/semiconductor and metal/semiconductor nanosuperstructures for plasmonic enhancement of light-nanocrystal and nanocrystal-nanocrystal interactions

Selected Publications

• Bae, W.K.; Joo, J.; Padilha, L.A.; Won, J.; Lee, D.C.; Lin, Q.; Koh, W.-k.; Luo, H.; Klimov, V.I. and J.M. Pietryga, Highly Effective Surface Passivation of PbSe Quantum Dots through Reaction with Molecular Chlorine, J. Am. Chem. Soc., 2012, 134, ASAP.
• Pandey, A.; Brovelli, S.; Viswanatha, R.; Li, L.; Pietryga, J.M.; Klimov, V.I. and S.A. Crooker, Long-lived photoinduced magnetization in copper-doped ZnSe-CdSe core-shell nanocrystals, Nature Nanotech., 2012, 7, 792-797.
• Khanal, B.P.; Pandey, A.; Li, L.; Lin, Q.; Bae, W.K.; Luo, H.; Klimov, V.I. and J. M. Pietryga, Generalized Synthesis of Hybrid Metal-Semiconductor Nanostructures Tunable from the Visible to the Infrared, ACS Nano, 2012, 6, 3832-3840.
• Viswanatha, R.; Pietryga, J.M., Klimov, V.I. and S.A. Crooker, Spin-polarized Mn2+ emission from Mn-doped colloidal nanocrystals, Phys. Rev. Lett., 2011, 107, 067402.
• Padilha, L.A.; Robel, I.; Lee, D.C.; Nagpal, P.; Pietryga, J.M. and V.I. Klimov, Spectral Dependence of Nanocrystal Photoionization Probability: The Role of Hot-Carrier Transfer, ACS Nano, 2011, 5, 5045-55.
• Li, L.; Pandey, A.; Werder, D.J.; Khanal, B.K.; Pietryga, J.M. and V.I. Klimov, Efficient synthesis of highly luminescent copper indium sulfide based core/shell nanocrystals with surprisingly long-lived emission, J. Am. Chem. Soc., 2011, 133, 1176-9.
• Lee, D.C.; Robel, I.; Pietryga, J.M. and V.I. Klimov, Infrared-Active Heterostructured Nanocrystals with Ultralong Carrier Lifetimes. J. Am. Chem. Soc. 2010, 132, 9960-2.
• Lee, D.C.; Pietryga, J.M.; Robel, I.; Werder, D.J,; Schaller, R.D. and V.I. Klimov. Colloidal synthesis of infrared-emitting germanium nanocrystals. J. Am. Chem. Soc., 2009, 131, 3436-7.
• Pietryga, J.M.; Zhuravlev, K.K.; Whitehead, M.; Klimov, V.I. and R.D. Schaller, Evidence for Barrierless Auger Recombination in PbSe Nanocrystals: A Pressure-Dependent Transient Absorption Study. Phys. Rev. Lett. 2008, 101, 217401.
• Pietryga, J.M.; Werder, D.J. ; Williams, D.J.; Casson, J.L.; Schaller, R.D.; Klimov, V.I. and J.A. Hollingsworth, Utilizing the lability of lead selenide to produce heterostructured nanocrystals with bright, stable infrared emission. J. Am. Chem. Soc., 2008, 130, 4879-85.
• Pietryga, J.M.; Schaller, R.D.; Werder, D.J.; Stewart, M.H.; Klimov, V.I. and J.A. Hollingsworth, Pushing the band gap envelope: Mid-infrared emitting colloidal PbSe quantum dots. J. Am. Chem. Soc., 2004, 126(38), 11752-3.

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December 2012