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  • Ph.D. Materials Science & Engineering, University of Pennsylvania, Philadelphia
  • M.S. Materials Science & Engineering, University of Illinois, Urbana-Champaign
  • B. S. Materials Science & Engineering, Seoul National University, Seoul, Korea


  • Visiting Scientist Los Alamos/Sandia National Lab, Los Alamos
  • Postdoctoral Research Associate Electrical Engineering, Mechanical Engineering & Materials Science, Yale University, New Haven

Awards and Honors

  • Inducted into Marquis Who’s Who in The World, 2017
  • Postdoctoral Associate Travel Grant Award, Yale University, 2015
  • IEEE Transactions on Electron Devices, Golden Reviewers, 2011
  • S. J. Stein Prize for Best Ph.D. Dissertation, University of Pennsylvania, 2010
  • MRS Graduate Student Award, Fall MRS, 2008
  • NBIC Graduate Student Award for Excellence in Research, University of Pennsylvania, 2008
  • Passing Ph.D. qualifying exam with Distinction, University of Pennsylvania, 2004


My research program explores the extraordinary properties of various emerging nanoscale materials and their translation to transformative technologies through interdisciplinary approaches.  A primary focus is on integrating a new class of low-dimensional materials into functional structures and developing a fundamental understanding of their topography-property relationships.  Material systems of a current interest include two-dimensional (2D) electronic materials beyond graphene, where every aspect of 2D materials research is explored, including new synthetic methods development, near atomic-scale characterization, and device applications for electronics and energy technologies.

Selected Publications

  1. S. Sohn*, Y. Jung*, J. Schroers, C.O. Osuji and J. J. Cha, “Nanoscale size effects in crystallization of metallic glasses” accepted, Nature Communications (* co-first author)
  2. Y. Jung, J. Shen, Y. Liu, J. M. Woods, Y. Sun, and J. J. Cha “Metal seed layer thickness-induced transition from vertical-to-horizon growth of MoS2 and WS2”  Nano Letters 14, 6842–6849 (2014)
  3. Y. Jung, J. Shen, Y. Sun, and J. J. Cha “Chemically synthesized heterostructures of two-dimensional molybdenum/tungsten-based dichalcogenides with vertically aligned layers” ACS Nano 8, 95508, (2014)
  4. Y. Jung†, X. Li, N. K. Rajan, A. D. Taylor, and M. A. Reed “Record high efficiency SWNT/Si solar cells”, Nano Letters 13, 95 (2013) († corresponding author)
  5. Y. Jung†, A. Vacic, D. E. Perea, S. T. Picraux, and M. A. Reed “Minority carrier lifetimes and surface effects in VLS-grown axial pn junction silicon nanowires” Advanced Materials 23, 4306 (2011)   (†corresponding author)
  6. Y. Jung, S.-W. Nam, Ritesh Agarwal “High resolution transmission electron microscopy study of electrically-driven phase change phenomena in Ge2Sb2Te5 nanowires” Nano Letters 11(3), 1364, (2011)
  7. S.-W. Nam, H.-S. Chung, Y. C. Lo, L. Qi, J. Li, Y. Lu, and A. T. C. Johnson, Y. Jung, P. Nukala and R. Agarwal “Electrical wind force-driven and dislocation-templated amorphization in phase change nanowires”, Science 336, 1561 (2012)
  8. Y. Jung, S.-H. Lee, A. T. Jennings, and R. Agarwal “Core-shell heterostructured phase change nanowire multistate memory” Nano Letters. 8 (7), 2056, (2008)
  9. Y. Jung, D.-K. Ko, and R. Agarwal. “Synthesis and structural characterization of single-crystalline branched nanowire heterostructures” Nano Letters. 7(2), 264, (2007)
  10. S.-H. Lee*, Y. Jung*, and R. Agarwal “Highly-scalable nonvolatile and ultra-low power nanowire memory” Nature Nanotechnology 2, 626 – 630 (2007) (* co-first author)
  11. Y. Jung, S.-H. Lee, D.-K. Ko, and R. Agarwal “Synthesis and characterization of Ge2Sb2Te5 nanowires with memory switching effect ” J. Am. Chem. Soc. 128 (43), 14026, (2006)