Publications

2025

63. Seung Hyeon Jeong, Woon Yong Sohn*: Deciphering the Limitations of γ-Fe₂O₃ as a Photoanode via Electrochemical and Near-Field Heterodyne Transient Grating Spectroscopic Analyses. (Under Review)

62. Geon Woo Kim, Woon Yong Sohn*: Efficient Charge Transfer in MAPb(IxBr1-x)3: Impact of Halide Composition. (Under Review)

61. Yeon Gyo Shim, Yuki Nakatsukasa, Kana Matsumoto, Ji Eun Kim, Su Jin Kim, Seung Heon Choi, Seung Hyeon Jeong, Seong Kyu Jang, Aram Hong, Kenji Katayama, Woon Yong Sohn*:  Comparative Assessment of FTO and ITO Substrates for BiVO4 Photoanodes: Superior Surface Quality and Water Oxidation in ITO. (Under Review) 

60. Seong Kyu Jang, Seung Hyeon Jeong, Aram Hong, Woon Yong Sohn*: Inducing the Cathodic Shift of the Onset Potential in Hematite (α-Fe2O3)-Based Photoanode with the TiO2 blocking layer by Inserting the Nickel Ferrite (NiFe2O4) Underlayer. (In Revision)

59. Seong Kyu Jang, Seung Hyeon Jeong, Aram Hong, Woon Yong Sohn*: Estimations of the Activation Energies for the Charge Transfers of the Long-Lived Holes at the Semiconductor/Electrolyte Interfaces of α-Fe2O3 and α-Fe2O3/Co-Pi Photoanodes. The Journal of Physical Chemistry Letters (Accepted)

58. Seung Hyeon Jeong, Hojun Lee, Aram Hong, Evan S. H. Kang, Woon Yong Sohn*: Investigation of Hole Transfer Efficiency in MAPbI3 Perovskite Solar Cells with Various Copper-based Hole Transport Materials Using Near-Field Heterodyne Transient Grating Spectroscopy. Chemical Physics Letters 2025; 876: 142228 

57. Yeon Gyo Shim+, Jong Yeong Ko+, Ji Hyun Kim, Seung Hyeon Jeong, Woon Yong Sohn*: Investigation of the Role of TiO2 Underlayer in the Anodic Potential Shift of the Onset Potential in Hematite (α-Fe2O3) Photoanode. Journal of Photochemistry and Photobiology A: Chemistry 2025; 464: 116303

(+ These authors contributed equally to this work.)

56. Hiroomi Shoda, Zhenhua Pan, Woon Yong Sohn, Kenji Katayama*: Insight into Charge Transport Mechanisms in Hematite Photoanodes via Potential-Dependent Impedance Spectroscopy and Machine Learning. ACS Applied Materials & Interfaces 2025; 17: 7830

55. Ji Hyun Kim, Seung Hyeon Jeong, Aram Hong, Zhenhua Pan, Kenji Katayama, Woon Yong Sohn*: Enhancement of the Photoelectrochemical Performance of Bismuth Vanadate (BiVO4) Photoanode by Building a W:BiVO4/Mo:BiVO4 Homojunction. Bulletin of the Korean Chemical Society 2025; 46: 301

2024

54. Seung Hyeon Jeong+, Seung Heon Choi+, Young Hyun Kim, Woon Yong Sohn*: Investigation of the Effect of the Passivation on the Charge Transfer from MAPbI3 to Electron Transport Layer Using a Heterodyne Transient Grating Spectroscopic Technique. ChemPhysChem 2024; 25: e202400333  

(+ These authors contributed equally to this work.)

53. Seong Kyu Jang+, Won Seok Choi+, Young Hyun Kim, Woon Yong Sohn*: Investigation of the Charge Injection from Organometal Halide Perovskite to a Hole Transport Layer Using a Heterodyne Transient Grating Spectroscopic Technique. Chemical Physics Letters 2024; 844: 141272

(+ These authors contributed equally to this work.)

52. Young Hyun Kim+, Yu Gyeong Bae+, Woon Yong Sohn*: Uncovering Energetic Positions of Surface Trap States in α-Fe2O3 Treated with Cobalt Phosphate (Co-Pi) Using Charge Carrier-Selective Heterodyne Transient Grating Technique. ChemPhysChem 2024; 25: e202300894 

(+ These authors contributed equally to this work.)

51. Na Kyung Lee, Woon Yong Sohn*: Utilization of Nickel Ferrite (NiFe2O4) in Hematite (α-Fe2O3) Photoanode for Photoelectrochemical Water Splitting as a Blocking Layer. ChemPhotoChem 2024; 8: e202300301 

50. Young Hyun Kim, Yu Gyeong Bae, Min Hyuk Lee, JunWoo Kim, Woon Yong Sohn*: Monitoring Charge Transfer Dynamics of Surface Trapped Holes in ZnO Surface Utilized for Ethanol Oxidation Using Heterodyne Transient Grating Spectroscopic Techniques. The Journal of Physical Chemistry C 2024; 128: 2990-2996 

49. Jung Yun Won, Zhenhua Pan, Yuriy Pihosh, Woon Yong Sohn*: Investigation of the Origin of the Enhanced Photoelectrochemical Performance of Gradient W-doped Bismuth Vanadate (BiVO4) photoanodes. International Journal of Hydrogen Energy 2024; 54: 1544-1551 

2023

48. Ji Hyun Kim, Jungmin Kim, Zhenhua Pan, Woon Yong Sohn*: Revealing the Roles of Surface treatments on Hematite (α-Fe2O3) Photoanode in the Shift of the Onset Potential.  Journal of Photochemistry and Photobiology A: Chemistry 2023; 445: 115037

47. Young Hyun Kim, Woon Yong Sohn*: A New Strategy for Monitoring the Charge Transfer from Perovskite Thin Films to Electron Transport Layers Using a Heterodyne Transient Grating Technique. Physical Chemistry Chemical Physics 2023; 25: 14742-14748 (Selected as one of the 2023 PCCP hot articles)

46. Young Hyun Kim, Yu Gyeong Bae, Woon Yong Sohn*: Development of Charge Carrier-Selective Heterodyne Transient Grating Spectroscopic Technique and Its Application in the Distinction of Surface Trap States in Hematite. Physical Chemistry Chemical Physics 2023; 25: 11981-11985 (Selected as one of the 2023 PCCP hot articles)

45. Ji Hyun Kim+, Na Kyung Lee+, Hee Won Kim, Zhenhua Pan, Woon Yong Sohn*: Sequential Modifications of the Surface of Hematite (α-Fe2O3) Photoanode with Amorphous Nickel Iron Oxide (NiFeOx) and Cobalt Phosphate (Co-Pi). Journal of Photochemistry and Photobiology A: Chemistry 2023; 437: 114478 (+ These authors contributed equally to this work.)

44. Asuka Minato, Zhenhua Pan, Kenji Katayama , Woon Yong Sohn*: Enhancement of Photoelectrochemical Performance of Bismuth Vanadate (BiVO4)-Based Photoanode by Building Phase-Junction Configurations. Journal of Photochemistry and Photobiology A: Chemistry 2023; 434: 114252

2022

43. Hee Won Kim, Jung Yun Won, Zhenhua Pan, Woon Yong Sohn*: Tailoring the morphology of hafnium zirconium oxide (Hf0.6Zr0.4O2) as a cocatalyst for photoelectrochemical water oxidation over a hematite (α-Fe2O3) photoanode. Bulletin of the Korean Chemical Society 2022; 43: 876 - 881

42. Yuhei Taga, Zhenhua Pan, Kenji Katayama, Woon Yong Sohn*: BiVO4-dotted WO3 Photoanode with an Inverse Opal Underlayer for Photoelectrochemical Water Splitting. ACS Applied Energy Materials 2022; 5: 5750 - 5755 

41. Asuka Minato, Kenji Katayama , Woon Yong Sohn*: Investigation of the Photo-Excited Charge Carrier Dynamics in Bismuth Vanadate (BiVO4) Photoanode by the Heterodyne Transient Grating Technique. Journal of Photochemistry and Photobiology A: Chemistry 2022; 424: 113659

2021

40. Kenji Katayama, Woon Yong Sohn: 8 Time-resolved dynamics of dye-doped liquid crystals and the origin of their optical nonlinearity. In book: Unconventional Liquid Crystals and Their Applications 2021; 10.1515/9783110584370-008

39. 김희원, 손운용*: 광전기화학적 물분해 메커니즘에 관한 연구 동향. 화학세계 2021; 6:11-16

38. Tsuyoshi Tokubuchi, Ramis Arbi, Pan Zhenhua, Kenji katayama, Ayse Turak*, Woon Yong Sohn*: Enhanced Photoelectrochemical Water Splitting Efficiency of Hematite (α-Fe2O3)-Based Photoelectrode by the Introduction of Maghemite (γ-Fe2O3) Nanoparticles.  Journal of Photochemistry and Photobiology A: Chemistry 2021; 410:113179

37. Yuhei Taga, Kenji Katayama, Woon Yong Sohn*: Time-resolved spectroscopic study of photo-excited charge carrier dynamics in hematite (α-Fe2O3): Effect of re-growth treatment. Journal of Photochemistry and Photobiology A: Chemistry 2021; 408:113107

2020

36. Minako Miyagawa, Woon Yong Sohn, Kenji katayama: Demonstration of rewritable hologram by using photo-induced optical nonlinearity in liquid crystals. Molecular Crystals and Liquid Crystals 2020; 712(1):97-103

35. Yota Sakai, Woon Yong Sohn, Kenji Katayama: Photo-controllable rotational motion of cholesteric liquid crystalline droplets in a dispersion system. RSC Advances 2020; 10(36):21191-21197

34. Mika Inaba, Kenji Katayama, Woon Yong Sohn*: Cooperative Effects of Surface and Interface Treatments in Hematite (α-Fe2O3) Photo-Anode on Its Photo-Electrochemical Performance. Sustainable Energy & Fuels 2020; 4:2174

2019

33. Yuya Nagai, Woon Yong Sohn, Kenji Katayama: Initial estimation method by cosine similarity for multivariate curve resolution: Application to NMR spectra of chemical mixture. The Analyst 2019; 144(20)

32. Haruka Sakanoue, Woon Yong Sohn, Kenji Katayama: Molecular Orientation Change Nearby Topological Defects Observed by Photo-Induced Polarization/Phase Microscopy. ACS Omega 2019; 4(9)

31. Yota Sakai, Woon Yong Sohn, Kenji Katayama: Optical motion control of liquid crystalline droplets by host-guest molecular interaction. Soft Matter 2019; 15(36) (Highlighted in back cover)

30. Makoto Ebihara, Woon Yong Sohn, Kenji Katayama: Lifetime mapping of photo-excited charge carriers by the transient grating imaging technique for nano-particulate semiconductor films. Review of Scientific Instruments 2019; 90(7):073905

29. Kenji Katayama, Daiki Kato, Kin-Ichiro Nagasaka, Minako Miyagawa, Woon Yong Sohn, Kuang-Wu Lee: Origin of optical nonlinearity of photo-responsive liquid crystals revealed by transient grating imaging. Scientific Reports 2019; 9(1):5754

28. Woon Yong Sohn*, Mika Inaba, Tsuyoshi Tokubuchi, James E. Thorne, Dunwei Wang*, Kenji Katayama*: Uncovering Photo-Excited Charge Carrier Dynamics in Hematite (α-Fe2O3) Hidden in Nanosecond Range by the Heterodyne Transient Grating Technique Combined with the Randomly Interleaved Pulse-Train Method. The Journal of Physical Chemistry C 2019; 123(11):6693-6700 (Highlighted as supplementary cover)

2018

27. Yoshiharu Dogishi, Yota Sakai, Woon Yong Sohn, Kenji Katayama: Optically induced motion of liquid crystalline droplets. Soft Matter 2018; 14(40) (Highlighted in back cover)

26. Daiki Kato, Woon Yong Sohn, Kenji Katayama: Aggregation-Induced Expansion of Poly-( N -isopropyl acrylamide) Solutions Observed Directly by the Transient Grating Imaging Technique. ACS Omega 2018; 3(8):8484-8490

25. Woon Yong Sohn, Jeong Jin Kim, MyeongWon Jeon, Takuma Aoki, Shun-ichi Ishiuchi, Masaaki Fujii, Hyuk KANG: Entropic Effect Makes a More Tightly Folded Conformer of a β-Amino Acid Less Stable: UV-UV Hole Burning and IR Dip Spectroscopy of L-β3-Homotryptophan by Laser Desorption Supersonic Jet Technique. Physical Chemistry Chemical Physics 2018; 20(30)

24. Mika Inaba, James E. Thorne, Dunwei Wang, Woon Yong Sohn*, Kenji Katayama*: Comparative Study of Photo-Excited Charge Carrier Dynamics of Atomic Layer Deposited and Solution-Derived Hematite Films: Dependence of Charge Carrier Kinetics on Surface Orientations. Journal of Photochemistry and Photobiology A: Chemistry 2018; 364:645-649

23. Naoya Yoshinaga, Naoto Nakajima, Woon Yong Sohn, Kenji Katayama: Facile and quick preparation of colloid crystals with micron-sized particles by intentionally induced convex flow. Chemistry Letters 2018; 47:1123-1126

22. Kin-Ichiro Nagasaka, Woon Yong Sohn, Kenji Katayama: Surface-dominant and bulk-dominant processes in the phase recovery of liquid crystals. Molecular Crystals and Liquid Crystals 2018; 663(1):82-89

21. Woon Yong Sohn, James E. Thorne, YaoHong Zhang, Shota Kuwahara, Qing Shen, Dunwei Wang, Kenji Katayama: Charge Carrier Kinetics in Hematite with an Amorphous NiFeOx Coating in Aqueous Solutions: Dependence on Bias Voltage. Journal of Photochemistry and Photobiology A Chemistry 02/2018; 353:344 - 348

20. Sana Habka, Woon Yong Sohn, Vanesa Vaquero, Marie Géléoc, Benjamin Tardivel, Valérie Brenner, Eric Gloaguen, Michel MONS: On the turn-inducing properties of asparagine: The structuring role of the amide side chain, from isolated model peptides to crystallized proteins. Physical Chemistry Chemical Physics 2018; 20(5):3411-3423

19. Daiki Shingai, Yusuke Ide, Woon Yong Sohn*, Kenji Katayama*: Photoexcited Charge Carrier Dynamics of Interconnected TiO2 Nanoparticles: Evidence of Enhancement of Charge Separation at Anatase-Rutile Particle Interfaces. Physical Chemistry Chemical Physics 2018; 20(5):3484-3489

2017

18. Yoshiharu Dogishi, Shun Endo, Woon Yong Sohn, Kenji Katayama: Formation of Photo-Responsive Liquid Crystalline Emulsion by Using Microfluidics Device. Entropy 2017; 19(12):669

17. Kenji Katayama, Daiki Kato, Kin-Ichiro Nagasaka, Minako Miyagawa, Woon Yong Sohn: Response of liquid crystals in the pre-transitional state. Molecular Crystals and Liquid Crystals 2017; 657(1):89-94

16. Miki Yamaguchi, Taisei Nishimura, Woon Yong Sohn, Qing Shen, Shota Kuwahara, Kenji Katayama: Optimization parameters and their effect for photo-generated carriers in solid-state dye-sensitized solar cells. Analytical Sciences 2017; 33(9):1041

15. Taisei Nishimura, Woon Yong Sohn, Qing Shen, Shota Kuwahara, Kenji Katayama: Anomalous enhancement by alkylamine of the dye-sensitized solar cells using TEMPO redox. Journal of Photochemistry and Photobiology A Chemistry 2017; 346:281-286

14. Woon Yong Sohn, Sana Habka, Eric Gloaguen, Michel MONS: Unifying the microscopic picture of His-containing turns: From gas phase model peptides to crystallized proteins. Physical Chemistry Chemical Physics 2017; 19(26):17128-17142

13. Woon Yong Sohn, Shota Kuwahara, James E. Thorne, Dunwei Wang, Kenji Katayama: Investigation of Photoexcited Carrier Dynamics in Hematite and the Effect of Surface Modifications by an Advanced Transient Grating Technique. ACS Omega 2017; 2(3):1031-1035

2016

12. Woon Yong Sohn, Valérie Brenner, Eric Gloaguen, Michel Mons: Local NH – π interactions involving aromatic residues of proteins: influence of backbone conformation and ππ* excitation on the π H bond strength, as revealed from studies of isolated model peptides. Physical Chemistry Chemical Physics 2016; 18(43):29969-29978

2014

11. Woon Yong Sohn, Shun-ichi Ishiuchi, Pierre Çarçabal, Hikari Oba, Masaaki Fujii: UV-UV hole burning and IR dip spectroscopy of homophenylalanine by laser desorption supersonic jet technique. Chemical Physics 2014; 445:21

10. Marcela Carolina Capello, Michel Broquier, Shun-Ichi Ishiuchi, Woon Y Sohn, Masaaki Fujii, Claude Dedonder-Lardeux, Christophe Jouvet, Gustavo A Pino: Fast Nonradiative Decay in o-Aminophenol. The Journal of Physical Chemistry A 02/2014; 118:2056

2013

9. Woon Yong Sohn, Jeong Seok Kang, So Young Lee, Hyuk Kang: Fluorescence excitation spectrum and solvent-assisted conformational isomerization (SACI) of jet-cooled acetaminophen. Chemical Physics Letters 2013; 581:36

8. Hae Jun Jung, Woon Yong Sohn, Cheol Ho Heo, Hwan Hyung Kim, Shun-ichi Ishiuchi, Masaaki Fujii, Hyuk Kang: Gas-Phase Spectroscopy of Laser-Desorbed Acedan and Proline-Acedan. Bulletin of the Korean Chemical Society 2013; 34(8):2241

7. Woon Yong Sohn, Shun-Ichi Ishiuchi, Mitsuhiko Miyazaki, Jeongseok Kang, Soyoung Lee, Ahreum Min, Myong Yong Choi, Hyuk Kang, Masaaki Fujii: Conformationally resolved spectra of acetaminophen by UV-UV hole burning and IR dip spectroscopy in the gas phase. Physical Chemistry Chemical Physics 01/2013; 15:957

2012

6. Woon Yong Sohn, Keun-Jin Cho, So Young Lee, Sung Sik Kang, Young Dong Park, Hyuk Kang: Solvent-Assisted Conformational Isomerization (SACI) of meta-Substituted Phenols: Tuning Relative Stability, Isomerization Barrier, and IVR Rate. Chemical Physics Letters 2012; 525-526:37

2011

5. Woon Yong Sohn, Minho Kim, Sang-Su Kim, Young Dong Park, Hyuk Kang: Solvent-assisted conformational isomerization and the conformationally-pure REMPI spectrum of 3-aminophenol. Physical Chemistry Chemical Physics 2011; 13(15):7037-42

4. Ivan Alata, Michel Broquier, Claude Dedonder-Lardeux, Christophe Jouvet, Minho Kim, Woon Yong Sohn, Sang-su Kim, Hyuk Kang, Markus Schütz, Alexander Patzer, Otto Dopfer: Microhydration effects on the electronic spectra of protonated polycyclic aromatic hydrocarbons: [naphthalene-(H2O)n = 1,2]H+. The Journal of Chemical Physics 2011; 134(7):074307

2010

3. Woon Yong Sohn, Minho Kim, Sang-Su Kim, Hyuk Kang: Computational Study of 3-Aminophenol·(CO 2 ) 1 Cluster: CO2 Capture Ability of 3-Aminophenol. Bulletin of the Korean Chemical Society 2010; 31:2806-2808

2. Woon Yong Sohn, Jae Shin Lee: Structure and Conformational Stability of Protonated Dialanine. The Journal of Physical Chemistry A 07/2010; 114(28):7537-43

1. Woon Yong Sohn, Tae Wu Kim, Jae Shin Lee: Structure and Energetics of C60O: A Theoretical Study. The Journal of Physical Chemistry A 2010; 114(4):1939-43