Jinwoo Hwang Stem Group

Jinwoo Hwang
Associate Professor
Department of Materials Science and Engineering
The Ohio State University
Center for Electron Microscopy and Analysis
1305 Kinnear Road, Columbus OH 43212
Email: hwang.458@osu.edu
Center for Electron Microscopy and Analysis (CEMAS)
Phone : 614-643-3459

Gabriel Calderon
Postdoctoral Researcher
calderon.52@buckeyemail.osu.edu

Research areas:
Functional organic materials, Magnetic interfaces, 4D-STEM and fluctuation microscopy

Hsien-Lien (Steve) Huang
PhD Candidate (joined in 2018)
huang.3527@buckeyemail.osu.edu

Research areas:
Gallium oxide materials and interfaces

Chris Chae
PhD student (joined in 2020)
chae.85@buckeyemail.osu.edu

Research areas:
Gallium oxide materials and interfaces

Minhazul Islam
PhD student (joined in 2021)
islam.164@buckeyemail.osu.edu

Research areas:
Metallic glasses, 4D-STEM and fluctuation microscopy

Sadikul Alam
PhD student (joined in 2022)

alam.135@buckeyemail.osu.edu

Research areas:
Magnetic interfaces

Group alumni

• Jared Johnson, PhD (Thermofisher Scientific)

• Soohyun Im, PhD (University of Wisconsin Madison)

• Menglin Zhu, PhD (MIT)
• Mehrdad Abbasi, PhD (Intel Corp.)

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Jinwoo's Google Scholar page

Magnetic Materials and Interfaces

1. Jackson D. Majher, Victor da Cruz Pinha Barbosa, Chris Chae, T. Amanda Strom, Jinwoo Hwang, Patrick M. Woodward, "Exploring the links between photoluminescence and microstructure in Cs2InBr5‧H2O samples doped with Pb2+", Chemistry of Materials 35, 482 (2023).

2. I. Kao, R. Muzzio, H. Zhang et al. "Deterministic switching of a perpendicularly polarized magnet using unconventional spin–orbit torques in WTe2", Nature Materials (2022).

3. W. Zhou et al, "Kinetically-controlled epitaxial growth of Fe3GeTe2 van der Waals ferromagnetic films", ACS Applied Electronic Materials 4, 3190 (2022).

4. S. Shrestha et al., "Emergent interlayer magnetic order via strain-induced orthorhombic distortion in the 5d Mott insulator Sr2IrO4", Physical Review B 105, L100404 (2022).

5. Tiancong Zhu et al., "Synthesis, magnetic properties, and electronic structure of magnetic topological insulator MnBi2Se4", Nano letters 21, 12, 5083 (2021).

6. Yang Cheng, Sisheng Yu, Menglin Zhu, Jinwoo Hwang, Fengyuan Yang, "Tunable topological Hall effects in noncollinear antiferromagnet Mn3Sn/Pt bilayers", APL Materials 9, 5, 051121 (2021).

7. S. Che et al., "Substrate-dependent band structures in trilayer graphene/h-BN heterostructures", Physical Review Letters 125, 246401 (2020).

8. T. Zhu et al, "Coherent growth and characterization of van der Waals  layers on GaAs(111)B using molecular beam epitaxy", Physical Review Materials 4, 084002 (2020).

9. Aidan J. Lee, Adam S. Ahmed, Brendan A. McCullian, et al. "Interfacial Rashba effect-induced anisotropy in nonmagnetic-material/ferrimagnetic-insulator bilayers", Physical Review Letters 124, 257202 (2020).

10. Yang Cheng, Sisheng Yu, Menglin Zhu, Jinwoo Hwang, and Fengyuan Yang, "Electrical switching of tristate antiferromagnetic Neel order in alpha-Fe2O3 epitaxial films", Physical Review Letters 124, 027202 (2020).

11. Yang Cheng, Sisheng Yu, Adam S. Ahmed, Menglin Zhu, You Rao, Maryam Ghazisaeidi, Jinwoo Hwang, and Fengyuan Yang, "Anisotropic magnetoresistance and nontrivial spin magnetoresistance in Pt/-FeO bilayers: Evidence for antiferromagnetic proximity effect", Physical Review B 100, 220408(R) (2019).

12. Yang Cheng, Sisheng Yu, Menglin Zhu, Jinwoo Hwang, and Fengyuan Yang, "Evidence of Topological Hall effect in Pt/antiferromagnetic insulator bilayers", Physical Review Letters 123, 237206 (2019).

Gallium Oxide Materials and Interfaces

1. Hsien-Lien Huang, Jared M. Johnson, Christopher Chae, Alexander Senckowski, Man Hoi Wong, and Jinwoo Hwang, "Atomic Scale Mechanism of β to γ phase Transformation in Gallium Oxide", Applied Physics Letters 122, 251602 (2023).

2. Hsien-Lien Huang, Christopher Chae, Jared M Johnson, Alexander Senckowski, Shivam Sharma, Uttam Singisetti, Man Hoi Wong, Jinwoo Hwang, "Atomic scale defect formation and phase transformation in Si implanted β-Ga2O3", APL Mater 11, 061113 (2023).

3. A F M Uddin Bhuiyan, Lingyu Meng, Hsien-Lien Huang, Jith Sarker, Chris Chae, Baishakhi Mazumder, Jinwoo Hwang, Hongping Zhao, "Metalorganic chemical vapor deposition of β-(AlxGa1− x) 2O3 thin films on (001) β-Ga2O3 substrates", APL Materials 11, 041112 (2023).

4. Yiwen Song, Arkka Bhattacharyya, Anwarul Karim, Daniel Shoemaker, Hsien-Lien Huang, Saurav Roy, Craig McGray, Jacob H Leach, Jinwoo Hwang, Sriram Krishnamoorthy, Sukwon Choi, "Ultra-Wide Band Gap Ga2O3-on-SiC MOSFETs", ACS Appl. Mater. Interfaces 15, 7137 (2023).

5. Mengen Wang, Sai Mu, Joel B. Varley, Jinwoo Hwang and Chris G. Van de Walle, Chapter 5, Defects in β-Ga2O3: Theory and Microscopic Studies in "Ultrawide Bandgap β-Ga2O3 Semiconductor: Theory and Applications", edited by James S. Speck and Esmat Farzana (AIP Publishing, Melville, New York, 2023).

6. Ashok V Dheenan, Joe F McGlone, Nidhin Kurian Kalarickal, Hsien-Lien Huang, Mark Brenner, Jinwoo Hwang, Steven A Ringel, Siddharth Rajan, "β-Ga2O3 MESFETs with insulating Mg-doped buffer grown by plasma-assisted molecular beam epitaxy", Applied Physics Letters 121, 11, 113503 (2022).

7. Lingyu Meng, A F M Anhar Uddin Bhuiyan, Zixuan Feng, Hsien-Lien Huang, Jinwoo Hwang, and Hongping Zhao, "Metalorganic Chemical Vapor Deposition of (100) β-Ga2O3 on on-axis Ga2O3 substrates", Journal of Vacuum Science and Technology A 40, 062706 (2022).

8. A F M Anhar Uddin Bhuiyan, Zixuan Feng,  Hsien-Lien Huang, Lingyu Meng,  Jinwoo Hwang, and  Hongping Zhao, "MOCVD growth and band offsets of κ-phase Ga2O3 on c-plane sapphire, GaN- and AlN-on-sapphire, and (100) YSZ substrates", Journal of Vacuum Science & Technology A 40, 062704 (2022).

9. A F M Anhar Uddin Bhuiyan et al., "In-situ MOCVD Growth and Band Offsets of Al₂O₃ Dielectric on β-Ga₂O₃ and β-(Al_xGa_1-x)₂O₃ thin films", Journal of Applied Physics 132, 165301 (2022).

10. A. Dheenan et al., "β-Ga2O3 MESFETs with insulating Mg-doped buffer grown by plasma-assisted molecular beam epitaxy", Applied Physics Letters 121, 113503 (2022).

11. Daram N. Ramdin,  Micah S. Haseman, Hsien-Lien Huang, Kevin D. Leedy, Jinwoo Hwang,and Leonard J. Brillson, "Optical and electronic effects of rapid thermal annealing at Ir–Ga2O3 interfaces", J. Appl. Phys. 131, 205302 (2022).

12. Hsien-Lien Huang, Chris Chae, Jinwoo Hwang, "Perspective on atomic scale investigation of point and extended defects in gallium oxide", Journal of Applied Physics 131, 190910 (2022).

13. A F M Anhar Uddin Bhuiyan et al., "Si doping in MOCVD grown (010) β-(AlxGa1-x)2O3 thin films", Journal of Applied Physics 131, 145301 (2022).

14. A F M Anhar Uddin Bhuiyan, Zixuan Feng, Hsien-Lien Huang, Lingyu Meng, Jinwoo Hwang, and Hongping Zhao. "Metalorganic Chemical Vapor Deposition of α-Ga2O3 and α-(AlxGa1−x)2O3 thin films on m-plane sapphire substrates", APL Materials 9, 101109 (2021).

15. A F M Anhar Uddin Bhuiyan, Zixuan Feng, Hsien-Lien Huang, Lingyu Meng,  Jinwoo Hwang, and  Hongping Zhao, "Band offsets at metalorganic chemical vapor deposited β-(AlxGa1−x)2O3/β-Ga2O3 interfaces—Crystalline orientation dependence", Journal of Vacuum Science & Technology A 39, 063207 (2021).

16. Nidhin Kurian Kalarickal. et al., "Planar and three-dimensional damage free etching of -Ga2O3 using atomic gallium flux", Applied Physics Letters 119, 123503 (2021).

17. Y. Song et al., "Thermal Conductivity of β-phase Ga2O3 and (AlxGa1-x)2O3 Heteroepitaxial Thin Films", ACS Applied Materials & Interfaces 13, 32, 38477 (2021).

18. Y. Song et al., "Ga2O3-on-SiC Composite Wafer for Thermal Management of Ultra-Wide Bandgap Electronics",  ACS Applied Materials & Interfaces 13, 34, 40817 (2021).

19. Jingjing Shi, Chao Yuan, Hsien-Lien Huang, Jared Johnson, Chris Chae, Shangkun Wang, Riley Hanus, Samuel Kim, Zhe Cheng, Jinwoo Hwang, and Samuel Graham, "Thermal Transport across Metal/β-Ga2O3 Interfaces" ACS Appl. Mater. Interfaces 13, 24, 29083 (2021).

20. J. M. Johnson, H-L. Huang,  M. Wang,  S. Mu,  J. B. Varley,  A F M Anhar Uddin Bhuiyan, Z. Feng,  N. K. Kalarickal, S. Rajan,  H. Zhao,  C. G. Van de Walle, and J. Hwang, "Atomic scale investigation of aluminum incorporation, defects, and phase stability in β-(AlxGa1-x)2O3 films", APL Materials 9, 051103 (2021) - Featured Article.

21. N. Kalarickal et al., "β-(Al0.18Ga0.82)2O3/Ga2O3 double heterojunction transistor with average field of 5.5 MV/cm", IEEE Electron Device Letters 42, 6, 899 (2021).

22. R. Karim et al, "A two-step growth of β-Ga2O3 films on (100) diamond via low pressure chemical vapor deposition", Journal of Vacuum Science & Technology A 39, 023411 (2021).

23. A F M Anhar Uddin Bhuiyan, Zixuan Feng, Jared M. Johnson, Hsien-Lien Huang, Jinwoo Hwang, and Hongping Zhao, "Band offsets of (100) β-(AlxGa1−x)2O3/β-Ga2O3 heterointerfaces grown via MOCVD", Appl. Phys. Lett. 117, 252105 (2020).

24. A F M Anhar Uddin Bhuiyan, Zixuan Feng, Jared M. Johnson, Hsien-Lien Huang, Jinwoo Hwang, and Hongping Zhao, "MOCVD growth of β-phase (AlxGa1-x)2O3 on (2-01) β-Ga2O3 substrates", Appl. Phys. Lett. 117, 142107 (2020).

25. A F M Anhar Uddin Bhuiyan, Zixuan Feng, Jared M. Johnson, Hsien-Lien Huang, Jinwoo Hwang, and Hongping Zhao, "MOCVD epitaxy of ultra-wide bandgap β-(AlxGa1-x)2/O3 with high-Al composition on (100) β-Ga2O3 substrates", Crystal Growth and Design 20, 6722 (2020).

26. A F M Anhar Uddin Bhuiyan , Zixuan Feng , Jared M. Johnson , Hsien-Lien Huang , Jith Sarker , Menglin Zhu , Md Rezaul Karim , Baishakhi Mazumder , Jinwoo Hwang , and Hongping Zhao, “Phase transformation in MOCVD growth of (AlxGa1−x)2O3 thin films”, APL Materials 8, 031104 (2020).

27. Jared M. Johnson, Zhen Chen, Joel B. Varley, Christine M. Jackson, Esmat Farzana, Zeng Zhang, Aaron R. Arehart, Hsien-Lien Huang, Arda Genc, Steven A. Ringel, Chris G. Van de Walle, David A. Muller, and Jinwoo Hwang, "Unusual formation of point defect complexes in the ultra-wide band gap semiconductor β-Ga2O3", Physical Review X 9, 041027 (2019).

28. Baishakhi Mazumder, Jith Sarkar, Yuewei Zhang, Jared M. Johnson, Menglin Zhu, Siddharth Rajan, and Jinwoo Hwang, "Atomic scale investigation of chemical heterogeneity in β-(AlxGa1-x)2O3 films using atom probe tomography", Appl. Phys. Lett. 115, 132105 (2019).

29. A F M Anhar Uddin Bhuiyan, Zixuan Feng, Zhaoying Chen, Jared Johnson, Hsien-Lien Huang, Jinwoo Hwang, and Hongping Zhao, "MOCVD epitaxy of β-(AlxGa1−x)2O3 thin films on (010) Ga2O3 substrates and N-type doping", Appl. Phys. Lett. 115, 120602 (2019).

30. Yuewei Zhang, Adam Neal, Zhanbo Xia, Chandan Joishi, Jared M. Johnson, Yuanhua Zheng, Sanyam Bajaj, Mark Brenner, Donald Dorsey, Kelson Chabak, Gregg Jessen, Jinwoo Hwang, Shin Mou, Joseph P. Heremans, and Siddharth Rajan, “Demonstration of high mobility and quantum transport in modulation-doped β-(AlxGa1-x)2O3/Ga2O3 heterostructures”, Appl. Phys. Lett. 112, 173502 (2018).

31. Subrina Rafique, Md Rezaul Karim, Jared Johnson, Jinwoo Hwang and Hongping Zhao, “LPCVD homoepitaxy of Si doped β-Ga2O3 thin films on (010) and (001) substrates”, Appl. Phys. Lett. 112, 052104 (2018).

32. Sriram Krishnamoorthy, Zhanbo Xia, Yuewei Zhang, Chandan Joishi, Joe McGlone, Jared Johnson, Mark Brenner, Aaron R. Arehart, Jinwoo Hwang, and Siddharth Rajan, “Modulation-doped β-(AlxGa1-x)2O3/ Ga2O3 Field-Effect Transistor”, Appl. Phys. Lett. 111, 023502 (2017).

Glasses and Amorphous Materials

1. Yutao Dong, Mehrdad Abbasi, Jun Meng, Lazarus German, Corey Carlos, Jun Li, Ziyi Zhang, Dane Morgan, Jinwoo Hwang, Xudong Wang, "Substantial Lifetime Enhancement of Si-Based Photoanodes Enabled by Amorphous TiO2 Coating with Improved Stoichiometry", Nature Communications 14, 1865 (2023).

2. Mehrdad Abbasi, Yutao Dong, Jun Meng, Dane Morgan, Xudong Wang, and Jinwoo Hwang, "In Situ Observation of Medium Range Ordering and Crystallization of Amorphous TiO2 Ultra-Thin Films Grown by Atomic Layer Deposition" APL Materials 11, 011102 (2023).

3. Jun Meng et al., "Experimentally informed structure optimization of amorphous TiO2 films grown by atomic layer deposition", Nanoscale 15, 2, 718 (2023).

4. Soohyun Im, Yuchi Wang, Pengyang Zhao, Geun Hee Yoo, Zhen Chen, Gabriel Calderon, Mehrdad Abbasi Gharacheh, Olivia Licata, Baishakhi Mazumder, David A. Muller, Eun Soo Park, Yunzhi Wang, and Jinwoo Hwang, "Medium-range ordering, structural heterogeneity, and their influence on properties of Zr-Cu-Co-Al metallic glasses", Physical Review Materials 5, 115604 (2021).

5. J. Braun et al., "Hydrogen effects on the thermal conductivity of delocalized vibrational modes in amorphous silicon nitride (a-SiN x:H)", Physical Review Materials 5, 035604 (2021).

6. Nirmal Baishnab, Rajan Khadka, Michelle Paquette, Paul Rulis, Nathan Oyler, Jinwoo Hwang, and Ridwan Sakidja, "Role of generated free radicals in synthesis of amorphous hydrogenated boron carbide from orthocarborane using argon bombardment: A ReaxFF molecular dynamics study", Materials Research Express 6, 12, 126461 (2020).

7. Soohyun Im, Zhen Chen, Jared M. Johnson, Pengyang Zhao, Geun Hee Yoo, Eun Soo Park, Yunzhi Wang, David A. Muller, and Jinwoo Hwang, "Direct Determination of Structural Heterogeneity in Metallic Glasses Using Four-Dimensional Scanning Transmission Electron Microscopy", Ultramicroscopy 195, 189 (2018).

8. Pengyang Zhao, Ju Li, Jinwoo Hwang, and Yunzhi Wang, "Influence of nanoscale structural heterogeneity on shear banding in metallic glasses", Acta Materialia 134, 104 (2017).

9. Jinwoo Hwang, Zenon. H. Melgarejo, Yunus E. Kalay, Ilkay Kalay, Matthew J. Kramer, Donald S. Stone, and Paul M. Voyles, “Nanoscale structure and structural relaxation in Zr50Cu45Al5 bulk metallic glass”, Physical Review Letters 108, 195505 (2012).

10. Yunus E. Kalay, Ilkay Kalay, Jinwoo Hwang, Paul M. Voyles, and Matthew J. Kramer, “Local chemical and topological order in Al-Tb and its role in controlling nanocrystal formation”, Acta Materialia 60, 994-1003 (2012).

11. Jinwoo Hwang, Anna M. Clausen, Hongbo Cao, and Paul M. Voyles, “Reverse Monte Carlo structural model for a zirconium-based metallic glass incorporating fluctuation microscopy medium range order data”, Journal of Materials Research 24, 10, 3121-3129 (2009).

Nitride and Oxide Wide Band Gap Semiconductors

1. Jith Sarker, Menglin Zhu, Abrar Rauf, Christopher Rouleau, Saquib Ahmed, Jinwoo Hwang, and Baishakhi Mazumder, "Understanding the structural-chemical evolution of epitaxial NbN/Al2O3/NbN tri-layers with varying NbN thickness" (submitted).

2. Yiwen Song et al., "Growth-microstructure-thermal property relations in AlN thin films", Journal of Applied Physics 132, 175108 (2022).

3. K. Zhang et al., "Pulsed-Mode MOCVD Growth of ZnSn(Ga)N2 and Determination of the Valence Band Offset with GaN", Crystal Growth and Design 22, 5004 (2022).

4. Md Rezaul Karim et al., "Band structure engineering based on InGaN/ZnGeN2 heterostructure quantum wells for visible light emitters", Crystal Growth and Design 22, 131 (2021).

5. Md Rezaul Karim et al., "Experimental determination of the valence band offsets of ZnGeN2 and (ZnGe)0.94Ga0.12N2 with GaN", Journal of Physics D: Applied Physics 54, 245102 (2021).

6. Md Rezaul Karim, Benthara Hewage Dinushi Jayatunga, Menglin Zhu, Rebecca A Lalk, Olivia Licata, Baishakhi Mazumder, Jinwoo Hwang, Kathleen Kash, and Hongping Zhao, "Effects of cation stoichiometry on surface morphology and crystallinity of ZnGeN2 films grown on GaN by metalorganic chemical vapor deposition", AIP Advances 10, 065302  (2020).

7. Bikramjit Chatterjee, Daniel Shoemaker, Yiwen Song, Tan Shi, Hsien-Lien Huang, Dongmin Keum, Anusha Krishnan, Brian M. Foley, Igor Jovanovic, Jinwoo Hwang, Hyungtak Kim, and Sukwon Choi, "Cumulative impacts of proton irradiation on the self-heating of AlGaN/GaN HEMTs", ACS Appl. Electron. Mater. 2. 980, (2020).

8. Micah S. Haseman, Md Rezaul Karim, Daram Ramdin, Brenton A. Noesges, Ella Feinberg, Benthara Hewage Dinushi Jayatunga, Walter R. L. Lambrecht, Menglin Zhu, Jinwoo Hwang, Kathleen Kash, Hongping Zhao, and Leonard J. Brillson, "Deep level defects and cation sublattice disorder in ZnGeN2", Journal of Applied Physics 127, 135703 (2020).

9. Hao Xue, Seongmo Hwang, Towhidur Razzak, Choong Hee Lee, Gabriel Calderon Ortiz, Zhanbo Xia, Shahadat Hasan Sohel, Jinwoo Hwang, Siddharth Rajan, Asif Khan, and Wu Lu, "All-MOCVD grown Al0.7Ga0.3N/Al0.5Ga0.5N high electron mobility transistor", Solid State Electronics, 164, 107696 (2020).

10. Md Rezaul Karim, Zixuan Feng, Jared M. Johnson, Menglin Zhu, Jinwoo Hwang, and Hongping Zhao, "Low pressure chemical vapor deposition of In2O3 films on off-axis c-sapphire substrates”, Crystal Growth & Design 19, 3, 1965 (2019).

11. Yuewei Zhang, Zane Jamal-Eddine, Fatih Akyol, Sanyam Bajaj, Jared M. Johnson, Gabriel Calderon, Andrew A. Allerman, Michael W. Moseley, Andrew M. Armstrong, Jinwoo Hwang, and Siddharth Rajan, “Tunnel-injected sub 290 nm ultra-violet light emitting diodes with 2.8 % external quantum efficiency”, Appl. Phys. Lett. 112, 071107 (2018).

12. Yuewei Zhang, Sriram Krishnamoorthy, Fatih Akyol, Jared M. Johnson, Andrew A. Allerman, Michael W. Moseley, Andrew M. Armstrong, Jinwoo Hwang, and Siddharth Rajan, “Reflective Metal/Semiconductor Tunnel Junctions for Hole Injection in AlGaN UV LEDs”, Appl. Phys. Lett. 111, 051104 (2017).

13. F. Akyol, S. Krishnamoorthy, Y. Zhang, J. Johnson, Jinwoo Hwang, and S. Rajan, "Low-resistance GaN tunnel homojunctions with 150 kA/cm2 current and repeatable negative differential resistance", Appl. Phys. Lett. 103, 131103 (2016).

14. Yuewei Zhang, Sriram Krishnamoorthy, Jared M. Johnson, Fatih Akyol, Andrew Armstrong, Andrew Allerman, Jinwoo Hwang, and Siddharth Rajan, "Interband Tunneling for Hole Injection In III-Nitride Ultraviolet Emitters", Appl. Phys. Lett. 106, 141103 (2015).

Low Dimensional Functional Materials and Interfaces 

1. H. Kim et al., "High-throughput manufacturing of epitaxial membranes from a single wafer by 2D materials-based layer transfer", Nature Nanotechnology 18, 464 (2023).

2. H. Kim et al., "Graphene nanopattern as a universal epitaxy platform for single-crystal membrane production and defect reduction", Nature Nanotechnology (2022).

3. Choong Hee Lee, Yuewei Zhang, Jared M. Johnson, Rachel Koltun, Vincent Gambin, John S. Jamison, Roberto C. Myers, Jinwoo Hwang, and Siddharth Rajan, "Molecular Beam Epitaxy of GaN on 2H-MoS2", Appl. Phys. Lett. 117, 123102 (2020).

4. Paul D. Garman, Jared M. Johnson, Vishank Talesara, Hao Yang, Dan Zhang, Jose Castro, Wu Lu, Jinwoo Hwang, and L. James Lee, "Silicon oxycarbide accelerated chemical vapor deposition of graphitic networks on ceramic substrates for thermal management enhancement", ACS Appl. Nano. Mater, 2, 1, 452 (2019).

5. Paul D. Garman, Jared M. Johnson, Vishank Talesara, Hao Yang, Xinpeng Du, Junjie Pan, Dan Zhang, Jianfeng Yu, Eusebio Cabrera, Ying‐Chieh Yen, Jose Castro, Wu Lu, Ji‐Cheng Zhao, Jinwoo Hwang, and L. James Lee, "Dual silicon oxycarbide accelerated growth of well‐ordered graphitic networks for electronic and thermal applications", Advanced Materials Technologies 4, 1800324 (2019).

6. Novin Mehrabi, Arvid Masud, Moyosore Afolabi,  Jinwoo Hwang,  Gabriel A. Calderon Ortiz  and  Nirupam Aich,  "Magnetic Graphene Oxide-Nano Zero Valent Iron (GO-nZVI) Nanohybrids Synthesized using Biocompatible Cross-linkers for Contaminant Removal", RSC Advances 9, 963 (2019).

7. Y. Kim, S. S. Cruz, Y. Song, B. Alawode, J. M. Johnson, C. Heidelberger, W. Kong, S. Choi, Y. S. Lee, C. Choi, E. A. Fitzgerald, A. Kolpak, J. Kong, J. Hwang, and J. Kim, "Remote epitaxy through graphene for two-dimensional material based layer transfer", Nature 544, 340 (2017).

8. Choong Hee Lee, Sriram Krishnamoorthy, Dante O'Hara, Jared Johnson, John Jamison, Roberto Myers, Roland Kawakami, Jinwoo Hwang, Siddarth Rajan, "Molecular Beam Epitaxy of 2D-layered Gallium Selenide on GaN substrates", Journal of Applied Physics 121, 094302 (2017).

9. Sriram Krishnamoorthy, Edwin Lee, Choong Hee Lee, Yuewei Zhang, William McCulloch, Jared M. Johnson, Jinwoo Hwang, Yiying Wu, and Siddharth Rajan, “High current density 2D/3D MoS2/GaN Esaki tunnel diodes”, Appl. Phys. Lett. 109, 183505 (2016).

10. Yiping Wang, Lucas Seewald, Yi-Yang Sun, Pawel Keblinski, Shengbai Zhang, Jared M. Johnson, Jinwoo Hwang, Toh- Ming Lu, Jian Shi, “Nonlinear Electron-Lattice Interactions in a Wurtzite Semiconductor Enabled via Strongly Correlated Oxide”, Advanced Materials, 28, 8975 (2016).

11. Choong Hee Lee, William McCulloch, Edwin W. Lee II, Lu Ma, Sriram Krishnamoorthy, Jinwoo Hwang, Yiying Wu, and Siddharth Rajan, “Transferred large area single crystal MoS2 field effect transistors”, Appl. Phys. Lett. 107, 193503 (2015).

12. A. Parra-Palomino, O. Perales-Perez, R. Singhal, Jinwoo Hwang, Paul M. Voyles, and M. S. Tomar, “Structural, optical and magnetic characterization of monodisperse Fe-doped ZnO nanocrystals”, Journal of Applied Physics 103, 07D121 (2008).

Life Sciences and Biomaterials

1. Joonbum Lee, Cameron McCurdy, Christopher Chae, Jinwoo Hwang, Madeline C. Karolak, Dong-Hwan Kim, Cassandra L. Baird, Benjamin M. Bohrer and Kichoon Lee, "Myostatin mutation in Japanese quail increased egg size but reduced eggshell thickness and strength", Animals 12, 47 (2022).

2. Kayla Presley, Jinwoo Hwang, Soshan Chang, Richard Tilley, Josh Collins, Mariano Viapiano, and John Lannutti, "Nanoscale upconversion for oxygen sensing", Materials Science and Engineering C 70, 76-84 (2017).

3. Vidya P. Bhallamudi, Ruipeng Xue, Carola M. Purser, Kayla F. Presley, Yeshavanth K. Banasavadi-Siddegowda, Jinwoo Hwang, Balveen Kaur, P. Chris Hammel, Michael G. Poirier, John J. Lannutti, and Ramasamy P. Pandian, "Nanofiber-based paramagnetic probes for rapid, real-time biomedical oximetry", Biomedical Microdevices 18(2), 1-10 (2016).

Oxide Interfaces

1. Olivia G Licata, Menglin Zhu, Jinwoo Hwang, Baishakhi Mazumder, “Nanoscale chemistry and ion segregation in zirconia-based ceramic at grain boundaries by atom probe tomography”, Scripta Materialia 213, 114603 (2022).

2. Sujan Shrestha, Matthew Coile, Menglin Zhu, Maryam Souri, Jiwoong Kim, Rina Pandey, Joseph Brill, Jinwoo Hwang, Jong-Woo Kim, and Ambrose Seo, "Nanometer-Thick Sr2IrO4 Freestanding Films for Flexible Electronics", ACS Applied Nanomaterials 3, 7, 6310 (2020).

3. M. Souri, J. Terzic, J. M. Johnson, J. G. Connell, J. H. Gruenewald, J. Thompson, J. W. Brill, J. Hwang, G. Cao, and A. Seo, “Electronic and optical properties of La-doped Sr3Ir2O7 epitaxial thin-films”, Physical Review Materials 2, 024803 (2018).

4. J. H. Gruenewald, J. H. Kim, H. S. Kim, J. M. Johnson, Jinwoo Hwang, M. Souri, J. Terzic, S. H. Chang, A. Said, J. W. Brill, G. Cao, H. Y. Kee, and S. S. A. Seo, “Engineering 1D Quantum Stripes from Superlattices of 2D Layered Materials”, Advanced Materials 29, 1603798 (2017). 

5. S. S. A. Seo, J. Nichols, J. Hwang, J. H. Gruenewald, M. Souri, J. Thompson, J. G. Connell, J. Terzic, and G. Cao, "Selective growth of an epitaxial Sr2IrO4 phase by pulsed laser deposition", Applied Physics Letters 109, 201901 (2016).

6. J. Thompson, J. M. Johnson, S. Ryee, J. Gruenewald, J. G. Connell, J. Nichols, S. Lee, J. Hwang, M. J. Han, H. N. Lee, D.-W. Kim, and S. S. A. Seo, "Enhanced metallic properties of SrRuO3 thin-films via moderated pulsed laser epitaxy", Applied Physics Letters 109, 161902 (2016).

7. Evgeny Mikheev, Jinwoo Hwang, Adam P. Kajdos, Adam J. Hauser, and Susanne Stemmer, “Tailoring resistive switching in Pt/SrTiO3 junctions by stoichiometry control”, Scientific Reports 5, 11079 (2015).

8. Adam J. Hauser, Evgeny Mikheev, Nelson E. Moreno, Jinwoo Hwang, Jack Y. Zhang, and Susanne Stemmer, “Correlation between stoichiometry, strain, and metal-insulator transitions of NdNiO3 films”, Applied Physics Letters 106 092104 (2015).

9. Justin K. Thompson, Jinwoo Hwang, John G. Connell, John Nichols, Susanne Stemmer, and Sung S. Ambrose Seo, “Alleviating polarity-conflict at the heterointerfaces of KTaO3/GdScO3”, Applied Physics Letters 105, 102901 (2014).

10. Jack Y. Zhang, Clayton A. Jackson, Santosh Raghavan, Jinwoo Hwang, and Susanne Stemmer, “Magnetism and local structure in low-dimensional, Mott insulating GdTiO3”. Physical Review B 88, 121104(R) (2013).

11. Jinwoo Hwang, Junwoo Son, Jack Y. Zhang, Anderson Janotti, Chris G. Van de Walle, and Susanne Stemmer, “Structural origins of the properties of rare earth nickelate superlattices”, Physical Review B 87, 060101(R) (2013).

12. Jack Y. Zhang, Jinwoo Hwang, Santosh Raghavan, and Susanne Stemmer, “Symmetry lowering in extreme electron density perovskite quantum wells”, Physical Review Letters 110, 256401 (2013).

13. Adam J. Hauser, Evgeny Mikheev, Nelson E. Moreno, Tyler A. Cain, Jinwoo Hwang, Jack Zhang, and Susanne Stemmer, “Temperature dependence of Hall coefficient of NdNiO3 thin films”, Applied Physics Letters 103, 182105 (2013).

14. Jinwoo Hwang, Jack Y. Zhang, Junwoo Son, and Susanne Stemmer, “Nanoscale quantification of octahedral tilts in perovskite films”, Applied Physics Letters 100, 191909 (2012).

15. Pouya Moetakef, Clayton A. Jackson, Jinwoo Hwang, Leon Balents, S. James Allen, and Susanne Stemmer, “Toward an artificial Mott insulator: Correlations in confined, high-density electron liquids in SrTiO3", Physical Review B 86, 201102(R) (2012).

Transmission Electron Microscopy 

1. Menglin Zhu and Jinwoo Hwang, "Scattering angle dependence of temperature susceptivity of thermal diffuse scattering in scanning transmission electron microscopy" Ultramicroscopy 232, 113419 (2022).

2. Jared Johnson, Soohyun Im, Wolfgang Windl, and Jinwoo Hwang, "Three-dimensional imaging of individual point defects using selective detection angles in annular dark field scanning transmission electron microscopy", Ultramicroscopy 172, 17, (2017).

3. Jason J. Maldonis, Jinwoo Hwang, and Paul M. Voyles, "FEMSIM+HRMC:  Simulation of and Structural Refinement using Fluctuation Electron Microscopy for Amorphous Materials" Computer Physics Communications 213, 217 (2017).

4. Jack Y. Zhang, Jinwoo Hwang, Brandon J. Issac, and Susanne Stemmer, “Variable angle high-angle annular dark-field imaging: applications to three-dimensional dopant atom profiling”, Scientific Reports 5, 12419 (2015).

5. Dylan T. Schweiss, Jinwoo Hwang, and Paul M. Voyles, "Inelastic and elastic mean free paths from FIB samples of metallic glasses", Ultramicroscopy 124, 6-12 (2013).

6. Jinwoo Hwang, Jack Y. Zhang, Adrian J. D'Alfonso, Leslie J. Allen, and Susanne Stemmer, “Three-dimensional imaging of individual dopant atoms in SrTiO3”, Physical Review Letters 111, 266101 (2013).

7. Paul M. Voyles and Jinwoo Hwang, “Fluctuation Electron Microscopy” in Characterization of Materials, E. N. Kaufmann, ed., Wiley (2012).

8. Jinwoo Hwang and Paul M. Voyles, “Variable resolution fluctuation electron microscopy on Cu-Zr metallic glass using a wide range of coherent STEM probe size”, Microscopy and Microanalysis 17, 67-74 (2011).

Metals and Metallic Interfaces

1. Xiaolei Guo, Hsien-Lien Huang, Menglin Zhu, Karthikeyan Hariharan, Szu-Chia Chien, Ngan Huynh, Jinwoo Hwang, Wolfgang Windl, Christopher D Taylor, Eric J Schindelholz, Gerald S Frankel, "Interstitial elements created via metal 3D printing", Materials Today (in press).

2. Taeseon Lee, Menglin Zhu, Taylor Dittrich, Jinwoo Hwang, Anupam Vivek, and Glenn Daehn, "Microstructural Investigation of the Impact Weld Interface of Pseudo Single Grained Cu and Ag", Metallurgical and Materials Transactions A, 51, 558 (2020).

3. Zhiyuan Feng, Belinda Hurley, Menglin Zhu, Zi Yang, Jinwoo Hwang, and Rudolph Buchheit, "Corrosion Inhibition of Mg Alloy By Aqueous Selenite (SeO32-)", Journal of The Electrochemical Society 166, 14, C520-C529 (2019).

Conference Proceedings

1. Mehrdad Abbasi Gharacheh, Jun Meng, Yutao Dong, Dane Morgan, Xudong Wang, and Jinwoo Hwang, "In-Situ 4D-STEM Study of Amorphous Titanium Oxide for Water Splitting Application", Microscopy and Microanalysis 28, S1, 442 (2022).

2. Menglin Zhu and Jinwoo Hwang, "Temperature Mapping with STEM Atomic Scale Debye-Waller Thermometry", Microscopy and Microanalysis 28, S1, 118 (2022).

3. Hsien-Lien Huang, Jared Johnson, Chris Chae, AFM Anhar Uddin Bhuiyan, Zixuan Feng, Nidhin Kurian Kalarickal, Siddharth Rajan, Hongping Zhao, Jinwoo Hwang, "Point Defects and Alloy Incorporation in Ultrawide Bandgap β-(AlxGa1-x) 2O3 Films", Microscopy and Microanalysis 27, S1, 2140 (2021).

4. Mehrdad Abbasi Gharacheh, Jun Meng, Yutao Dong, Dane Morgan, Xudong Wang, Jinwoo Hwang, "4D-STEM Determination of Atomic Structure of Amorphous Materials for Renewable Energy Applications", Microscopy and Microanalysis 27, S1, 396 (2021).

5. Gabriel Calderon Ortiz, Menglin Zhu, Letian Dou, and Jinwoo Hwang, "Four-Dimensional Scanning Transmission Electron Microscopy Identification of Molecular Ordering in Organic Semiconducting Polymers", Microscopy and Microanalysis 27, S1, 1534 (2021).

6. Gabriel Calderon Ortiz et al., "4D-STEM quantification of nanoscale ordered domains in organic semiconducting polymers", Microscopy and Microanalysis 26, S2, 1740 (2020).

7. Hsien-Lien Huang, Jared Johnson, and Jinwoo Hwang, "Atomic distribution of Al and phase transformation in β-(AlxGa1-x)2O3", Microscopy and Microanalysis 26, S2 1228 (2020).

8. Menglin Zhu and Jinwoo Hwang, "Quantification of thermal interface resistance using atomic scale Debye-Waller thermometry", Microscopy and Microanalysis 26, S2, 960 (2020).

9. Jared Johnson, Hsien-Lien Huang, and Jinwoo Hwang, "Point defects and complexes in gallium oxide materials and devices", Microscopy and Microanalysis 26, S2, 838 (2020).

10. Soohyun Im et al. "Connecting structural heterogeneity to properties of disordered materials", Microscopy and Microanalysis 26, S2, 714 (2020).

11. Mehrdad Abbasi Gharacheh et al., "Direct determination of medium range ordering in amorphous hydrogenated boron carbide for low-k dielectric applications", Microscopy and Microanalysis 26, S2, 248 (2020).

12. Soohyun Im et al., "Determining medium range atomic ordering in metallic glasses using 4D-STEM", Microscopy and Microanalysis 26, S2, 230 (2020).

13. Jith Sarker, Yuewei Zhang, Menglin Zhu, Siddharth Rajan, Jinwoo Hwang, and Baishakhi Mazumder, "Understanding the growth mechanism of β-(AlxGa1−x)2O3 by atom probe tomography", Microscopy and Microanalysis 25, S2, 2508 (2019).

14. Menglin Zhu, Jared M. Johnson, and Jinwoo Hwang, "Atomic scale Debye-Waller themometry", Microscopy and Microanalysis 25, S2, 1642 (2019).

15. Gabriel Calderon, Letian Dou, and Jinwoo Hwang, "4D-STEM characterization of molecular ordering in organic semiconductors", Microscopy and Microanalysis 25, S2, 1752 (2019).

16. Soohyun Im, Zhen Chen, Jared M. Johnson, Pengyang Zhao, Geun Hee Yoo, Eun Soo Park, Yunzhi Wang, David A. Muller, and Jinwoo Hwang, "Probing nanoscale structural heterogeneity in metallic glasses using 4-D STEM" Microscopy and Microanalysis 24, S1, 202 (2018).

17. Jared M Johnson, Choong Hee Lee, Sriram Krishnamoorthy, Siddharth Rajan, and Jinwoo Hwang, “Atomic scale structure and defects in 2D GaSe films and van der waals interface”, Microscopy and Microanalysis 23, S1, 1728 (2017).

18. Gabriel Calderon Ortiz, Menglin Zhu, and Jinwoo Hwang, "Determining nanoscale molecular ordering in semiconducting polymers", Microscopy and Microanalysis 23, S1, 1780 (2017).

19. Jared Johnson and Jinwoo Hwang, "Imaging of individual vacancies using electron channeling contrast in STEM", Microscopy and Microanalysis 23, S1, 446 (2017).

20. Soohyun Im, Michelle M. Paquette, Mohammed Belhadj-Larbi, Paul Rulis, Ridwan Sakidja, and Jinwoo Hwang, "Nanoscale structure-property relationship in amorphous hydrogenated boron carbide for low-k dielectric applications", Microscopy and Microanalysis 23, S1, 1486 (2017).

21. Soohyun Im, Jared Johnson, and Jinwoo Hwang, "Effect of probe channeling on differential phase contrast at the atomic scale", Microscopy and Microanalysis 22, S3, 934 (2016).

22. Jared M. Johnson, Choong Hee Lee, Siddharth Rajan, and Jinwoo Hwang, "Exploring thermal properties of MoS2 using in situ quantitative STEM", Microscopy and Microanalysis 22, S3, 912 (2016).

23. Pengyang Zhao, Soohyun Im, Jinwoo Hwang, and Yunzhi Wang, “New insights into deformation of metallic glasses by combining mesoscale simulation and fluctuation electron microscopy”, Microscopy and Microanalysis 22, S3, 1436 (2016).

24. Jared M. Johnson, Justin Thompson, S. S. A. Seo, and Jinwoo Hwang, “Identifying atomic reconstruction at the complex oxide interfaces using quantitative STEM” Microscopy and Microanalysis 21, S3, 1237 (2015).

25. Jinwoo Hwang, “Three-dimensional imaging of point defects in functional materials using quantitative STEM” Microscopy and Microanalysis 21, S3, 1233 (2015).

26. 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”, Microscopy and Microanalysis 20, S3, 52 (2014).

27. Jinwoo Hwang, JackY. Zhang, and Susanne Stemmer, “Progress in applications of quantitative STEM”, Microscopy and Microanalysis 20, S3, 58 (2014).

28. 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", Microscopy and Microanalysis 19, S2, 686 (2013).

29. Zenon Humberto Melgarejo, Joseph E. Jakes, Jinwoo Hwang, Yunus E. Kalay, Matthew J. Kramer, Paul M. Voyles, and Donald S. Stone, "Variation of hardness and modulus across the thickness of Zr-Cu-Al metallic glass ribbons", Materials Research Society Symp. Proc. 1520 (2013).

30. 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", Microscopy and Microanalysis 19, S2, 794 (2013).

31. Jinwoo Hwang, Jack Y. Zhang, Junwoo Son, and Susanne Stemmer, “Quantifying octahedral rotations in ultrathin LaNiO3 films using position averaged convergent beam electron diffraction”, Microscopy and Microanalysis 18, S2, 1844 (2012).

32. Jinwoo Hwang, Yunus E. Kalay, Matthew J. Kramer, and Paul M. Voyles, “Angular correlations in coherent electron nanodiffraction of a metallic glass”, Microscopy and Microanalysis 17, S2, 1110 (2011).

33. F. Yi, Jinwoo Hwang, Seth Imhoff, John H. Perepezko, and Paul M. Voyles, “STEM fluctuation microscopy characterization of an amorphous – protocrystalline metal glass nanocomposite”, Microscopy and Microanalysis 16, S2, 1644 (2010).

34. Jinwoo Hwang and Paul M. Voyles, “Nanometer scale atomic order in a bulk metallic glass from Fluctuation Microscopy”, Microscopy and Microanalysis 15, S2, 770 (2009).

35. Jinwoo Hwang, Hongbo Cao, and Paul M. Voyles, “Nanometer-scale structural relaxation in Zr-based bulk metallic glass”, Materials Research Society Symp. Proc. 1048-Z05-04 (2008).

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SonicAtomic (2019)

SonicAtomic is an interactive digital interface running on an iPad that converts electron microscopy images to sound waves through a process called sonification. The interface allows people with visual impairment to perceive the data using their auditory sense and potentially increase their participation in S&E fields (3.2 million Americans have visual impairment in 2015). Sonic Atomic was primarily developed by Mr. Thomas Watts from Cornell University who joined Jinwoo's group as a REU student in Summer 2019 as a part of the education and outreach effort of his NSF CAREER project.  SonicAtomic has been demonstrated to detect point defects in crystalline materials, and the results were presented at the MRS Fall meeting in 2019. 

For more information, please see the MRS 2019 presentation by Thomas Watts.  The source code of SonicAtomic is also available upon request (Jinwoo's email: hwang.458@osu.edu).

More detailed documentation made by Abdullahi Said, an OSU undergraduate researcher, is also available through Github.