Education:
Feb. 2005 : Ph. D. in Chemical Engineering, Hanyang University, Seoul, Korea
Feb. 1997 : M. S. in Industrial Chemistry, Hanyang University, Seoul, Korea
Feb. 1995 : B. S. in Industrial Chemistry, Hanyang University, Seoul, Korea

Current Research:
Synthesis and modification of silica nanoparticles containing photosensitizers for chemical imaging.

Publications (Since 2003):
C. Y. Jung, H. J. Hah, S. H. Han, and S. M. Koo, “Preparation of Tin Oxide-Based Metal Oxide Particles”, J. Sol-Gel Sci. Tech., 2005, 33, 81. 

D. I. Han, H. J. Hah, and S. M. Koo, “Composite Silica Particles Using a Mixture of Organosilane Monomers: Effect of Molar Ratio of Monomers”, J. Sol-Gel Sci. Tech., 2004, 32, 47. 

H. J. Hah and S. M. Koo, “Surface Modification of PTMS Particles with Organosilanes: TEOS-, VTMS-, and MTMS-Modified PTMS Particles”, J. Sol-Gel Sci. Tech., 2004, 31, 117.

H. J. Hah, J. I. Um, S. H. Han, and S. M. Koo, “New Synthetic Route for Preparing Rattle-Type Silica Particles with Metal Cores”, Chem. Commun., 2004, 1012-1013.

H. M. Sung-Suh, J. R. Choi, H. J. Hah, S. M. Koo, and Y. C. Bae, “Comparison of Ag deposition effects on the photocatalytic activity of nanoparticulate TiO₂ under visible and UV light irradiation”, J. Photochem. Photobio. A Chem., 2004, 163(1-2), 37-44. 

H. J. Hah, J. S. Kim, B. J. Jeon, S. M. Koo, and Y. E. Lee, “Simple preparation of monodisperse hollow silica particles without using templates”, Chem. Commun., 2003, 1712-1713.

 H. J. Hah, S. M. Koo, and S. H. Lee, “Preparation of Silver Nanoparticles through Alcohol Reduction with Organoalkoxysilanes”, J. Sol-Gel Sci. Tech., 2003, 26, 467-471.