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Jinwoo Hwang

  • Assistant Professor, Materials Science Engineering
  • CEMAS
    Room 482
    Columbus, OH 43210
  • 614-643-3459

About

Jinwoo Hwang received his Ph.D. from the University of Wisconsin, Madison in 2011. He has been a postdoctoral researcher at the University of California, Santa Barbara for 3 years. His research interests include advanced structural characterization of materials, S/TEM technique development, and computational materials modeling. In particular, he has developed novel S/TEM techniques and simulation methods based on electron nanodiffraction and quantitative imaging, for nanostructured materials, oxide heterostructures, and non-crystalline materials. For his contributions to the field, he has received several honors and awards, including The Albert Crewe award from the Microscopy Society of America in 2014.

Honors

  • August, 2014

    The Albert Crewe Award.

  • August, 2013

    Postdoctoral Best Paper Award.

  • June, 2012-
    June, 2013

    Materials Research Laboratory / DOW Travel Fellowhip.

  • August, 2011

    Best Poster Award.

  • June, 2011

    Wisconsin Alumni Association Academic Achievement Award.

  • September, 2010

    Vilas Conference Presentation Fellowship.

  • June, 2003-
    June, 2005

    Korean National Science and Engineering Foundation Graduate Study Abroad Scholarship.

Books

2012

  • Hwang, J.; Voyles, P.M.. 2012. "Characterization of materials, Chapter "Fluctuation electron microscopy"." Wiley.

Journal Articles

2017

  • Zhao, P.; Li, J.; Hwang, J.; Wang, Y., 2017, "Influence of nanoscale structural heterogeneity on shear banding in metallic glasses." Acta Materialia 134, 104-104 - 104-104.
  • Presley, K.; Hwang, J.; Cheong, S.; Tilley, R. et al., 2017, "Nanoscale upconversion for oxygen sensing.." Mater Sci Eng C Mater Biol Appl 70, 76-84 - 76-84.
  • Lee, C.H.; Krishnamoorthy, S.; O'Hara, D.J.; Brenner, M.R. et al., 2017, "Molecular beam epitaxy of 2D-layered gallium selenide on GaN substrates." Journal of Applied Physics 121, no. 9, 094302-094302 - 094302-094302.
  • Zhang, Y.; Krishnamoorthy, S.; Akyol, F.; Johnson, J.M. et al., 2017, "Reflective metal/semiconductor tunnel junctions for hole injection in AlGaN UV LEDs." Applied Physics Letters 111, no. 5, 051104-051104 - 051104-051104.
  • Johnson, J.M.; Im, S.; Windl, W.; Hwang, J., 2017, "Three-dimensional imaging of individual point defects using selective detection angles in annular dark field scanning transmission electron microscopy.." Ultramicroscopy 172, 17-29 - 17-29.
  • Krishnamoorthy, S.; Xia, Z.; Joishi, C.; Zhang, Y. et al., 2017, "Modulation-doped β−(Al0.2Ga0.8)2O3/Ga2O3 field-effect transistor." Applied Physics Letters 111, 023502-023502 - 023502-023502.
  • Maldonis, J.J.; Hwang, J.; Voyles, P.M., 2017, "FEMSIM+HRMC: Simulation of and structural refinement using fluctuation electron microscopy for amorphous materials." Computer Physics Communications 213, 217-217 - 217-217.
  • Gruenewald, J.H.; Kim, J.; Kim, H.S.; Johnson, J.M. et al., 2017, "Engineering 1D quantum stripes from superlattices of 2D layered materials.." Advanced Materials 29, 1603798-1603798 - 1603798-1603798.
  • Johnson, J.M.; Hwang, J., 2017, "Imaging of individual vacancies using electron channeling contrast in STEM." Microscopy and Microanalysis 23, no. S1, 446-446 - 446-446.
  • Calderon Ortiz, G.; Zhu, M.; Hwang, J., 2017, "Determining Nanoscale Molecular Ordering in Semiconducting Polymers." Microscopy and Microanalysis 23, no. S1, 1780-1781 - 1780-1781.
  • Kim, Y.; Cruz, S.S.; Lee, K.; Alawode, B.O. et al., 2017, "Remote epitaxy through graphene enables two-dimensional material-based layer transfer." Nature 544, no. 7650, 340-343 - 340-343.

2016

  • Im, S.; Johnson, J.; Hwang, J., 2016, "Effect of probe channeling on differential phase contrast at the atomic scale." Microscopy and Microanalysis 22, no. S3, 934-935 - 934-935.
  • Johnson, J.M.; Lee, C.H.; Rajan, S.; McCulloch, W. et al., 2016, "Exploring thermal properties of MoS2 using in situ quantitative STEM." Microscopy and Microanalysis 22, no. S3, 912-913 - 912-913.
  • Akyol, F.; Krishnamoorthy, S.; Zhang, Y.; Johnson, J. et al., 2016, "Low-resistance GaN tunnel homojunctions with 150 kA/cm(2) current and repeatable negative differential resistance." Applied Physics Letters 109, no. 10, 256-256 - 256-256.
  • Wang, Y.; Seewald, L.; Sun, Y-Y.; Keblinski, P. et al., 2016, "Nonlinear electron-lattice interactions in a wurtzite semiconductor enabled via strongly correlated oxide.." Advanced Materials 28, no. 40, 8975-8982 - 8975-8982.
  • Krishnamoorthy, S.; Lee, E.W.; Lee, C.H.; Zhang, Y. et al., 2016, "High current density 2D/3D MoS2/GaN Esaki tunnel diodes." Applied Physics Letters 109, no. 18, 183505-183505 - 183505-183505.
  • Zhao, P.; Im, S.; Hwang, J.; Wang, Y., 2016, "New insights into deformation of metallic glasses by combining mesoscale simulation and fluctuation electron microscopy." Microscopy and Microanalysis 22, no. S3, 1436-1437 - 1436-1437.
  • Thompson, J.; Nichols, J.; Lee, S.; Ryee, S. et al., 2016, "Enhanced metallic properties of SrRuO3 thin films via kinetically controlled pulsed laser epitaxy." Applied Physics Letters 109, 161902-161902 - 161902-161902.
  • Seo, S.S.A.; Nichols, J.; Hwang, J.; Terzic, J. et al., 2016, "Selective growth of epitaxial Sr2IrO4 by controlling plume dimensions in pulsed laser deposition." Applied Physics Letters 109, 201901-201901 - 201901-201901.
  • Bhallamudi, V.P.; Xue, R.; Purser, C.M.; Presley, K.F. et al., 2016, "Nanofiber-based paramagnetic probes for rapid, real-time biomedical oximetry." Biomedical Microdevices 18, no. 2, 1-1 - 1-1.

2015

  • Hwang, J., 2015, "Three-dimensional imaging of point defects in functional materials using quantitative STEM." Microscopy and Microanalysis 21, no. S3, 1233-1234 - 1233-1234.
  • Hauser, A.J.; Mikheev, E.; Moreno, N.E.; Hwang, J. et al., 2015, "Correlation between stoichiometry, strain, and metal-insulator transitions of NdNiO3 films." Applied Physics Letters 106, no. 9, 092104-092104 - 092104-092104.
  • Zhang, J.Y.; Hwang, J.; Isaac, B.J.; Stemmer, S., 2015, "Variable-angle high-angle annular dark-field imaging: application to three-dimensional dopant atom profiling.." Scientific Reports 5, 12419-12419 - 12419-12419.
  • Mikheev, E.; Hwang, J.; Kajdos, A.P.; Hauser, A.J. et al., 2015, "Tailoring resistive switching in Pt/SrTiO3 junctions by stoichiometry control." Scientific Reports 5, 11079-11079 - 11079-11079.
  • Johnson, J.M.; Thompson, J.; Seo, S.S.A.; Hwang, J., 2015, "Identifying atomic reconstruction at complex oxide interfaces using quantitative STEM." Microscopy and Microanalysis 21, no. S3, 1237-1238 - 1237-1238.
  • Zhang, Y.; Krishnamoorthy, S.; Johnson, J.M.; Akyol, F. et al., 2015, "Interband tunneling for hole injection in III-nitride ultraviolet emitters." Applied Physics Letters 106, no. 14, 141103-141103 - 141103-141103.
  • Lee, C.H.; McCulloch, W.; Lee, E.W.; Ma, L. et al., 2015, "Transferred large area single crystal MoS2 field effect transistors." Applied Physics Letters 107, no. 19, 193503-193503 - 193503-193503.

2014

  • Thompson, J.; Hwang, J.; Nichols, J.; Connell, J.G. et al., 2014, "Alleviating polarity-conflict at the heterointerfaces of KTaO3/GdScO3 polar complex-oxides." Applied Physics Letters 105, 102901-102901 - 102901-102901.
  • Hwang, J.; Zhang, J.Y.; D’ Alfonso, A.J.; Allen, L.J. et al., 2014, "Three-dimensional observation of dopant atoms in quantitative scanning transmission electron microscopy." Microscopy and Microanalysis 20, no. S3, 52-53 - 52-53.
  • Hwang, J.; Zhang, J.Y.; Stemmer, S., 2014, "Progress in applications of quantitative STEM." Microscopy and Microanalysis 20, no. S3, 58-59 - 58-59.

2013

  • Hauser, A.J.; Mikheev, E.; Moreno, N.; Cain, T.A. et al., 2013, "Temperature-dependence of the Hall coefficient of NdNiO3 thin films." Applied Physics Letters 103, no. 18, 182105-182105 - 182105-182105.
  • Zhang, J.Y.; Hwang, J.; Raghavan, S.; Stemmer, S., 2013, "Symmetry lowering in extreme-electron-density perovskite quantum wells." Physical Review Letters 110, no. 25, 256401-256401 - 256401-256401.
  • Schweiss, D.T.; Hwang, J.; Voyles, P.M., 2013, "Inelastic and elastic mean free paths from FIB samples of metallic glasses." Ultramicroscopy 124, 6-6 - 6-6.
  • Hwang, J.; Zhang, J.Y.; D'Alfonso, A.; Allen, L.J. et al., 2013, "Three-dimensional imaging of individual dopant atoms in SrTiO3." Physical Review Letters 111, no. 26, 266101-266101 - 266101-266101.
  • Hwang, J.; Son, J.; Zhang, J.Y.; Janotti, A. et al., 2013, "Structural origins of the properties of rare earth nickelate superlattices." Physical Review B 87, no. 6, 060101-060101 - 060101-060101.
  • Zhang, J.Y.; Jackson, C.A.; Raghavan, S.; Hwang, J. et al., 2013, "Magnetism and local structure in low-dimensional Mott insulating GdTiO3." Physical Review B 88, no. 12, 121104-121104 - 121104-121104.

2012

  • Moetakef, P.; Jackson, C.A.; Hwang, J.; Balents, L. et al., 2012, "Toward an artificial Mott insulator: Correlations in confined high-density electron liquids in SrTiO3." Physical Review B 86, no. 20, 201102-201102 - 201102-201102.
  • Kalay, Y.E.; Kalay, I.; Hwang, J.; Voyles, P.M. et al., 2012, "Local chemical and topological order in Al-Tb and its role in controlling nanocrystal formation." Acta Materialia 60, no. 3, 994-994 - 994-994.
  • Hwang, J.; Melgarejo, Z.H.; Kalay, Y.E.; Kalay, I. et al., 2012, "Nanoscale structure and structural relaxation in Zr50Cu45Al5 bulk metallic glass." Physical Review Letters 108, no. 19, 195505-195505 - 195505-195505.
  • Hwang, J.; Zhang, J.Y.; Son, J.; Stemmer, S., 2012, "Nanoscale quantification of octahedral tilts in perovskite films." Applied Physics Letters 100, no. 19, 191909-191909 - 191909-191909.

2011

  • Hwang, J.; Voyles, P.M., 2011, "Variable resolution fluctuation electron microscopy on Cu-Zr metallic glass using a wide range of coherent STEM probe size." MICROSCOPY AND MICROANALYSIS 17, no. 1, 67-67 - 67-67.

2010

  • Yi, F.; Hwang, J.; Imhoff, S.; Perepezko, J. et al., 2010, "STEM fluctuation microscopy characterization of an amorphous – protocrystalline metal glass nanocomposite." Microscopy and Microanalysis 16, no. S2, 1644-1645 - 1644-1645.

2009

  • Hwang, J.; Clausen, A.M.; Cao, H.; Voyles, P.M., 2009, "Reverse Monte Carlo structural model for a zirconium-based metallic glass incorporating fluctuation microscopy medium-range order data." Journal of Materials Research 24, no. 10, 3121-3121 - 3121-3121.

Presentations

  • "Nanometer-scale structural relaxation in Zr-based bulk metallic glass." 2007, Presented at Materials Research Society Fall Meeting,
  • "Short to medium range order in Zr-based bulk metallic glass by Reverse Monte Carlo simulation." 2008, Presented at Materials Research Society Fall Meeting,
  • "Nanometer scale atomic order in a bulk metallic glass from fluctuation microscopy." 2009, Presented at Microscopy and Microanalysis,
  • "Angular correlations in coherent electron nanodiffraction of a metallic glass." 2011, Presented at Microscopy and Microanalysis,
  • "Nano-scale characterization of materials using quantitative electron diffraction in scanning transmission electron microscopy." 2013, Presented at Southern California Society for Microscopy and Microanalysis Spring Meeting,
  • "Three-dimensional imaging of individual dopant atoms in SrTiO3 using quantitative scanning transmission electron microscopy." 2014, Presented at Microscopy and Microanalysis,
  • "Coherent electron nanodiffraction fluctuation microscopy measurements of nanometer-scale structure in amorphous materials." 2011, Presented at Materials Research Society Spring Meeting,
  • "Quantification of epitaxial strain and crystal structure in nanoscale oxide films using position averaged convergent beam electron diffraction." 2013, Presented at Microscopy and Microanalysis,
  • "Computational structure refinement by hybrid reverse Monte Carlo simulation incorporating fluctuation electron microscopy." 2013, Presented at Microscopy and Microanalysis,
  • "Quantifying octahedral tilts in perovskite films at the nanoscale." 2014, Presented at Pacific Rim Conference on Ceramic and Glass Technology,
  • "Reverse Monte Carlo simulation of medium-range atomic order in bulk metallic glass incorporating fluctuation electron microscopy." 2010, Presented at TMS,
  • "Nanoscale characterization of octahedral tilts in LaNiO3 heterostructures using position averaged convergent beam electron diffraction." 2012, Presented at Materials Research Society Fall Meeting,
  • "Nanometer scale atomic structure of Zr-based bulk metallic glass." 2010, Presented at Argonne National Laboratory Postdoctoral Research Symposium,
  • "Nanometer scale structural fluctuation in Zr-based bulk metallic glass." 2010, Presented at Materials Research Society Fall Meeting,
  • "Quantifying octahedral rotations in ultrathin LaNiO3 films using position averaged convergent beam electron diffraction." 2012, Presented at Microscopy and Microanalysis,
  • "Using aqueous and non-aqueous solvents as a delivery system for the encapsulation of molecules within Single-wall carbon nanotubes." 2005, Presented at Southern California Society for Microscopy and Microanalysis Spring Meeting,

Papers in Proceedings

2013

  • Melgarejo, Z.H.; Jakes, J.E.; Hwang, J.; Kalay, Y.E. et al. "Variation of Hardness and Modulus across the Thickness of Zr-Cu-Al Metallic Glass Ribbons." (1 2013).
  • Jinwoo Hwang, Jack Y. Zhang, Junwoo Son, Evgeny Mikheev, Adam J. Hauser, and Susanne Stemmer "Quantification of epitaxial strain and crystal structure in nanoscale oxide films using position averaged convergent beam electron diffraction." in Microscopy and Microanalysis. (8 2013).
  • Melgarejo, Z.H.; Jakes, J.E.; Hwang, J.; Kalay, Y.E. et al. "Variation of hardness and modulus across the thickness of Zr-Cu-Al metallic glass ribbons." in Materials Research Society Fall Meeting. (3 2013).
  • Zenon Humberto Melgarejo, Joseph E. Jakes, Jinwoo Hwang, Yunus E. Kalay, Matthew J. Kramer, Paul M. Voyles "Variation of hardness and modulus across the thickness of Zr-Cu-Al metallic glass ribbons." in Materials Research Society Fall Meeting. (3 2013).
  • Hwang, J.; Melgarejo, Z.H.; Kalay, Y.E.; Kramer, M.J. et al. "Computational Structure Refinement by Hybrid Reverse Monte Carlo Simulation Incorporating Fluctuation Electron Microscopy." (8 2013).
  • Hwang, J.; Zhang, J.Y.; Son, J.; Mikheev, E. et al. "Quantification of Epitaxial Strain and Crystal Structure in Nanoscale Oxide Films Using Position Averaged Convergent Beam Electron Diffraction." (8 2013).
  • Hwang, J.; Melgarejo, Z.H.; Kalay, Y.E.; Kramer, M.J. et al. "Computational structure refinement by hybrid reverse Monte Carlo simulation incorporating fluctuation electron microscopy." in Microscopy and Microanalysis. (8 2013).
  • Hwang, J.; Zhang, J.Y.; Son, J.; Mikheev, E. et al. "Quantification of epitaxial strain and crystal structure in nanoscale oxide films using position averaged convergent beam electron diffraction." in Microscopy and Microanalysis. (8 2013).
  • Jinwoo Hwang, Z. H. Melgarejo, Y. E. Kalay, M. J. Kramer, D. S. Stone, and P. M. Voyles "Computational structure refinement by hybrid reverse Monte Carlo simulation incorporating fluctuation electron microscopy." in Microscopy and Microanalysis. (8 2013).

2012

  • Jinwoo Hwang, Jack Y. Zhang, Junwoo Son, and Susanne Stemmer "Quantifying octahedral rotations in ultrathin LaNiO3 films using position averaged convergent beam electron diffraction." in Microscopy and Microanalysis. (8 2012).
  • Hwang, J.; Zhang, J.Y.; Son, J.; Stemmer, S. "Quantifying octahedral rotations in ultrathin LaNiO3 films using position averaged convergent beam electron diffraction." in Microscopy and Microanalysis. (8 2012).
  • Hwang, J.; Zhang, J.Y.; Son, J.; Stemmer, S. "Quantifying Octahedral Rotations in Ultrathin LaNiO3 Films Using Position Averaged Convergent Beam Electron Diffraction." (7 2012).

2011

  • Hwang, J.; Kalay, Y.; Kramer, M.; Voyles, P. "Angular Correlations in Coherent Electron Nanodiffraction of a Metallic Glass." (7 2011).
  • Jinwoo Hwang, Yunus E. Kalay, Matthew J. Kramer, and Paul M. Voyles "Angular correlations in coherent electron nanodiffraction of a metallic glass." in Microscopy and Microanalysis. (8 2011).
  • Hwang, J.; Kalay, Y.E.; Kramer, M.J.; Voyles, P.M. "Angular correlations in coherent electron nanodiffraction of a metallic glass." in Microscopy and Microanalysis. (8 2011).

2010

  • F. Yi, Jinwoo Hwang, Seth Imhoff, John H. Perepezko, and Paul M. Voyles "Microscopy and Microanalysis." (8 2010).
  • Yi, F.; Hwang, J.; Imhoff, S.; Perepezko, J. et al. "STEM fluctuation microscopy characterization of an amorphous-protocrystalline metal glass nanocomposite." (8 2010).

2009

  • Hwang, J.; Voyles, P.M. "Nanometer scale atomic order in a bulk metallic glass from fluctuation microscopy." (7 2009).
  • Hwang,Jinwoo; Voyles,P,M "Nanometer Scale Atomic Order in a Bulk Metallic Glass from Fluctuation Microscopy." (7 2009).
  • Hwang, J.; Voyles, P. "Nanometer Scale Atomic Order in a Bulk Metallic Glass from Fluctuation Microscopy." (7 2009).

2008

  • Parra-Palomino, A.; Perales-Perez, O.; Singhal, R.; Tomar, M. et al. "Structural, optical, and magnetic characterization of monodisperse Fe-doped ZnO nanocrystals." (4 2008).
  • Parra-Palomino,A; Perales-Perez,O; Singhal,R; Tomar,M; Hwang,Jinwoo; Voyles,P,M "Structural, optical, and magnetic characterization of monodisperse Fe-doped ZnO nanocrystals." in 52nd Annual Conference on Magnetism and Magnetic Materials. (4 2008).
  • Parra-Palomino, A.; Perales–Perez, O.; Singhal, R.; Tomar, M. et al. "Structural, optical, and magnetic characterization of monodisperse Fe-doped ZnO nanocrystals." (4 2008).
  • Hwang, J.; Cao, H.; Voyles, P.M. "Nanometer-scale structural relaxation in Zr-based bulk metallic glass." (3 2008).
  • Jinwoo Hwang, Hongbo Cao, and Paul M. Voyles "Nanometer-scale structural relaxation in Zr-based bulk metallic glass." (3 2008).

2007

  • Hwang, J.; Cao, H.; Voyles, P.M. "Nanometer-scale Structural Relaxation in Zr-based Bulk Metallic Glass." (1 2007).

Unknown

  • Jinwoo Hwang, Jack Y. Zhang, Adrian J. D'Alfonso, Leslie J. Allen, and Susanne Stemmer "Three-dimensional imaging of individual dopant atoms in SrTiO3 using quantitative scanning transmission electron microscopy." in Microscopy and Microanalysis.
  • Hwang, J.; Zhang, J.Y.; D'Alfonso, J.Y.; Allen, L.J. et al. "Three-dimensional imaging of individual dopant atoms in SrTiO3 using quantitative scanning transmission electron microscopy." in Microscopy and Microanalysis.