Dr. Mitra Taheri

Hoeganaes Assistant Professor of Metallurgy

Contact Information

LeBow 441
(215) 895-6618

Education

  • Directorate Postdoctoral Fellowship, Lawrence Livermore National Laboratory, Chemistry, Materials and Life Sciences Division, 2006-2008, and Guest Scientist, Lawrence Berkeley National Laboratory, National Center for Electron Microscopy, 2006-2008 (Advisor: Nigel D. Browning)
  • National Research Council Postdoctoral Fellowship, Naval Research Laboratory, 2005-2006 (Advisor: Rhonda M. Stroud)
  • Ph.D., Materials Science and Engineering, Carnegie Mellon University, 2005 (Advisor: Anthony D. Rollett)
  • Visiting Scientist, National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, University of California, 2004-2005 (Advisor: Eric A. Stach, currently at Purdue University)
  • Visiting Scientist, Northwestern Center for Atom Probe Tomography, Northwestern University, 2005 (Advisor: David N. Seidman)
  • Visiting Scientist, RWTH-Aachen, Aachen, Germany, 2002 (Advisors: Dimitri A. Molodov & Günter Gottstein)

Selected Honors

  • National Research Council Postdoctoral Award, 2005
  • Elected to Sigma Xi Research Honor Society, 2005
  • Materials Research Society Graduate Student Medal, 2004
  • NSF-Sponsored Visiting Scientist, Institut für Metallkunde und Metallphysik RWTH-Aachen, Germany, July 2002,
  • US Steel Graduate Fellowship, 2001-2002
  • Small Undergraduate Research Grant (SURG), 2000-2001
  • "All Conference", 1999, NCAA UAA, Track and Field

Affiliations

  • The American Physical Society (APS)
  • Sigma Xi, Scientific Research Honor Society
  • American Society of Metals (ASM)
  • The Minerals, Metals, and Materials Society (TMS)
  • Materials Research Society (CMU Chapter President and Founder)
  • Computational Materials Science Network
  • The American Ceramic Society (Acers)

Research Interests

  • Development of the Ultrafast Dynamic Transmission Electron Microscope (DTEM) for the study the microstructural evolution in nanostructured materials, including Al Alloys, GaN nanowires and Silicon nanowires.
  • The use of various in-situ Transmission Electron Microscopy techniques:
    • In-situ TEM annealing and laser-induced transformations using the DTEM. The primary focus of research is the laser-assisted nucleation, growth and microstructural analysis of nanostructures, and structural transformations in metals, such as grain boundary faceting-defacting transitions.
    • In-situ TEM-based deformation and nanoindentation of nanostructured metallic and ceramic materials.
    • In-Situ TEM-based electrical biasing of conducting materials including nanowires and nanotubes.
    • In-Situ Environmental TEM for various heterogeneous catalysis studies.

Selected Publications

  1. M. Taheri, E.E. Carpenter, V. Cestone, M.M. Miller, M.F. Raphael, M.E. McHenry and V.G. Harris, “Magnetism and Structure of ZnxFe3–xO4 Films Processed via Spin-Spray Deposition,” J. Appl. Phys. 91, 7595-7597 (2002)
  2. S.Son, M. Taheri, E.E. Carpenter, V.G. Harris and M.E. McHenry, “Synthesis of Ferrite and Nickel Ferrite Nanoparticles Using Radio-Frequency Thermal Plasma Torch,” J. Appl. Phys. 91, 7589-7591 (2002)
  3. A.D. Rollett, M.L. Taheri, and B.S. El-Dasher, “Texture Dependent Measurement of Crystallization Kinetics Using Electron Backscatter Diffraction,” Proceedings of Plasticity ’02, eds. A.S. Khan and O. Lopez-Pamies, Neat Press, MD, 2002, pp.42-44
  4. M.L. Taheri, A.D. Rollett, and H. Weiland, “In-Situ Quantification of Solute Effects on Grain Boundary Mobility and Character in Aluminum Alloys During Recrystallization,” Materials Science Forum 467-470 (2004) 997-1002
  5. M.L. Taheri, A.D. Rollett and H. Weiland, “In-Situ Investigation of Grain Boundary Mobility and Character in Aluminum Alloys in the Presence of a Stored Energy Driving Force,” Mat. Res. Soc. Symp. Proc., 819 (2004) N6.5.
  6. M.L. Taheri, Eric Stach, V.R. Radmilovic, H. Weiland and A.D. Rollett, “In-Situ Electron Microscopy Studies of the Effect of Zr on Grain Boundary Anisotropy and Mobility in an Aluminum Alloy,” Mat. Res. Soc. Symp. Proc., (2004) P7.7.
  7. M.L. Taheri, J. Sebastian, D.N. Seidman, and A.D. Rollett, “Evidence for Solute Drag during Recrystallization of Aluminum Alloys”, Mat. Res. Soc. Symp. Proc., (2005) EE 6.5/BB6.5
  8. M.L.Taheri, D.Molodov, G.Gottstein and A.D.Rollett, “Grain Boundary Mobility under a Stored Energy Driving Force: A Comparison to Curvature-Driven Boundary Migration”, Zeitschrift für Metallkunde, 96 (2005) 10, 1166-1170.
  9. M. Taheri, A.D. Rollett and H. Weiland, “A Method of Measuring Stored Energy Macroscopically using Statistically Stored Dislocations in Commercial Purity Aluminum,” Metallurgical and Materials Transactions 37A (2006) 19-25.
  10. Zolensky, M. et al., “Mineralogy and petrology of Comet Wild-2 nucleus samples - Final results of the preliminary examination team,” Meteoritics & Planetary Science 41(8): A167-A167, 2006
  11. Brownlee, D. et al., “Comet 81P/Wild 2 Under a Microscope,” Science, 15 Dec, Vol. 314. no. 5806, pp. 1711 – 1716 (2006)
  12. Zolensky, M et al., “Mineralogy and Petrology of Comet 81P/Wild 2 Nucleus Samples,” Science, 15 Dec, Vol. 314. no. 5806, pp. 1735 – 1739 (2006)
  13. B. Simpkins, M. L. Taheri, R.M. Stroud and P. Pehrsson, “Diameter Control of GaN Nanowires,” J. Appl. Phys. 101, 094305 (2007).
  14. A. Brahme, ML Taheri, M. Alvi & AD Rollett, “Boundary Segment Method to Estimate Stored Energy from EBSD Maps,” Scripta Materialia, accepted (2007)
  15. M.L. Taheri, J. Sebastian, V. Radmilovic, N. Zaluzec, D. Seidman, E.A. Stach and A.D. Rollett, “Studies of the Effect of Solute Segregation on the Anisotropy, Mobility and Chemistry of Grain Boundaries: Direct In-Situ Observations from the Meso- to the Atomic Scale,” Acta Materialia, submitted (2007).
  16. M.L. Taheri, B. Simpkins, P. Pehrsson and R.M. Stroud, “In-Situ STM-TEM Studies of GaN Nanowires,” in preparation.
  17. M.L. Taheri, B.W. Reed, T.B. Lagrange & N.D. Browning, “In-Situ Synthesis of Nanowires in the Dynamic TEM,” in preparation.
  18. M.L. Taheri, J.T. Sebastian, B.W. Reed, D.N. Seidman and A.D. Rollett, “A Site-Specific Method for Atomic Scale Analysis of Solute Segregation to a Coincidence Site Lattice Grain Boundary,” in preparation.
  19. M.L. Taheri, W.S. Wong, M. Herrera & N.D. Browning, “In-Situ Analysis of the Vapor-Liquid-Solid Growth Mechanism in GaN Nanowires: A Staged Approach,” in preparation.
  20. M.L. Taheri, J.P. Lu, N. Teslich & N.D. Browning, “Ultrafast imaging of the Crystallization of a-Si for TFT Applications,” in preparation.