个人简介

Institute on the Environment Fellow 2011 - present McKnight Presidential Fellow, 2008-2011 George Taylor Career Development Award, 2008 Best Chemistry Professor of the Year Award Institute of Technology Student Organization, 2008 University of Minnesota Thank a Teacher Award, 2007 & 2002 National Science Foundation Career Award, 2004 - 2009

研究领域

Experimental Physical Chemistry/Nanoscience & Materials Chemistry/Environmental & Green Chemistry/

Our group’s research focus involves bridging the gap between the nanometer-length scale and the chemical and physical behavior of nanocrsytalline materials. We aim to link chemical reactivity with specific microstructural features of both natural and synthetic nanoparticles. Tools we use: Analytical chemistry methods, synthesis of nanocrystalline materials, materials characterization methods (e.g., high-resolution transmission electron microscopy, scanning electron microscopy, atomic force microscopy, x-ray diffraction).

近期论文

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Synthesis of Cu2ZnSnS4 thin films directly onto conductive substrates via selective thermolysis using microwave energy, T. Ryan Knutson, Parker J. Hanson, Eray S. Aydil, and R. Lee Penn (2014) Chem. Commun., 50(44):5902-4. doi: 10.1039/c3cc49207a. Crystalline Nanoparticle Aggregation in Non-Aqueous Solvents, Nathan D. Burrows, Ellina Kesselman, Kairat Sabyrov, Amanda Stemig, Yeshayahu Talmon, and R. Lee Penn (2014) Cryst. Eng. Comm., 16, 1472-1481. Two-Step Phase Transformation of Anatase to Rutile in Aqueous Suspension, Kairat Sabyrov, Vanessa Adamson, and R. Lee Penn (2014) Cryst. Eng. Comm., 16, 1488-1495. Characterizing Crystal Growth by Oriented Aggregation, R. Lee Penn and Jennifer A. Soltis (2014) Cryst. Eng. Comm., 16, 1409-1418. Crystal Growth by Oriented Attachment: Kinetic Models and Control Factors, Xiaogang Xue, R. Lee Penn, Edson Roberto Leite, Feng Huang, and Zhang Li, (2014) Cryst. Eng. Comm., 16, 1419-1429. The origin of magnetic remanence in stalagmites: Observations from electron microscopy and rock magnetism, Strauss, B.E., Strehlau, J.H., Feinberg, J.M., Penn, R.L. (2013) Geochemistry, Geophysics, Geosystems, 14, 5006–5025. Effect of pH on the Kinetics of Crystal Growth by Oriented Aggregation, Burrows, N. D.; Hale, C. R. H.; Penn, R. L., (2013) Crystal Growth & Design, 13, 3396-3403. A disordered nanoparticle model for 6-line ferrihydrite, Gilbert, B.; Erbs, J. J.; Penn, R. L.; Petkov, V.; Spagnoli, D.; Waychunas, G. A., (2013) American Mineralogist, 98, 1465-1476. Cryogenic Transmission Electron Microscopy: Aqueous Suspensions of Nanoscale Objects Microscopy and Microanalysis, Nathan D Burrows and R Lee Penn (2013), Microscopy and Microanalysis, DOI:10.1017/S1431927613013354. Introducing Colorimetric Analysis with Camera Phones and Digital Cameras: An Activity for High School or General Chemistry, Kehoe, E.; Penn, R. L., (2013) Journal of Chemical Education, 90, 1191–1195. Size-Dependent Anatase to Rutile Phase Transformation and Particle Growth, Kairat Sabyrov, Nathan D. Burrows, and R. Lee Penn (2013) Chemistry of Materials, 25, 1408-1415 DOI: 10.1021/cm302129a. Aggregation of ferrihydrite nanoparticles in aqueous systems, Virany M. Yuwono, Nathan D. Burrows, Jennifer A. Soltis, Tram Anh Do, and R. Lee Penn (2012) Faraday Discussions, in press. Effect of Ionic Strength on the Kinetics of Crystal Growth by Oriented Aggregation, Nathan D. Burrows, Christopher R. H. Hale, and R. Lee Penn (2012) Crystal Growth and Design, DOI: 10.1021/cg3004849 Article ASAP. X-ray magnetic circular dichroism provides strong evidence for tetrahedral iron in ferrihydrite, Guyodo, Yohan; Sainctavit, Philippe; Arrio, Marie-Anne; et al. (2012) Geochemistry Geophysics Geosystems, 13 Q06Z44 DOI: 10.1029/2012GC004182. On the nucleation and crystallization of silicalite-1 from a dilute clear sol, Kumar, S.; Penn, R. L.; Tsapatsis, M. (2011) Microporous and Mesoporous Materials, 144 (1-3), 74-81. Size-Dependent Bandgap of Nanogoethite, Zhang, H.; Bayne, M.; Fernando, S.; Legg, B.; Zhu, M.; Penn, R. L.; Banfield, J. F. (2011) Journal of Physical Chemistry C, 115 (36), 17704-17710. Controlling heterogenite particle morphology and microstructure by varying synthetic conditions, Jason C. Myers, R. Lee Penn (2011) Materials Research Bulletin, 46(5), 649-657. Sub-40 nm Zeolite Suspensions via Disassembly of Three-Dimensionally Ordered Mesoporous-Imprinted Silicalite-1, P.S. Lee, X.Y. Zhang, J.A. Stoeger, A. Malek, W. Fan, S. Kumar, W.C. Yoo, S. Al Hashimi, R.L. Penn, A. Stein, M.Tsapatsis (2011) Journal of the American Chemical Society, 133, 493-502. Separation, characterization and initial reaction studies of magnetite particles from Hanford sediments, D. R. Baer, A. E. Grosz, E. S. Ilton, K. M. Krupka, J. Liu, R. L. Penn, and A. Pepin (2010), Physics and Chemistry of the Earth, 35, 233-241. Tracking Surface Evolution Using Ligand-Assisted Dissolution of Cobalt Oxyhydroxide Jason C. Myers and R. Lee Penn (2010), Langmuir, Article ASAP.