Graduate Exam Abstract

Myeong Yeol Choi

Ph.D. Preliminary

November 10, 2011, 8:00 am.

Engineering B105

RF atmospheric plasma for biomedical application

Abstract: Various types of atmospheric plasma for biomedical applications such as tissue removal, tooth whitening, and epidermis removal are presented. The preliminary results and experimental concept for further understandings will be shown. Non-contact device for tissue removal was achieved using CSU plasma torch. The removal rate was increased by adding chemical. Plasma enhanced electrosurgery was designed and improved by different chemical additive. The results of removing tissue by those plasmas were compared with conventional electrosurgery. Tooth whitening at low temperature (< 40 degC) and non-toxic condition was achieved by gas-liquid plasma. The stain on the tooth was removed in 8 minutes. Epidermis removal by low temperature slot plasma is shown as well. In conclusion, plasma chemical reaction can be optimized for specific applications.

Adviser: Dr. George J. Collins
Co-Adviser: N/A
Non-ECE Member: Dr. Dean A. Hendrickson, Clinical Sciences
Member 3: Dr. Branislav M Notaros, ECE
Addional Members: Dr. Masahiro Watanabe

I. G. Koo, Myeong Yeol Choi, Jong Hoon Kim, Jin Hoon Cho, and W. M. Lee*, "Microdischarge in Porous Ceramics with Atmospheric Pressure High Temperature H2O/SO2 Gas Mixture and its Application for Hydrogen Production", Japanese Journal of Applied Physics, 47 (2008) 4705-4709

Jong Hoon Kim, Juhee Sohn, Jin Hoon Cho, Myeong Yeol Choi, Il Gyo Koo, Woong Moo Lee*, "Surface Modification of Nafion Membrane by Atmospheric Pressure Low Temperature Plasma for Electrochemical Applications", Plasma Processes and Polymers, 5 (2008) 377-385

J. H. Cho, I. G. Koo, M. Y. Choi, and W. M. Lee, "Ozone production by nanoporous dielectric barrier glow discharge in atmospheric pressure air", Applied Physics Letters, 92 (2008) 101504

I. G. Koo, J. H. Cho, M. Y. Choi, and W. M. Lee, "Room-temperature slot microplasma in atmospheric pressure air between cylindrical electrodes with a nanoporous alumina dielectric", Applied Physics Letters, 91 (2007) 041502

Program of Study: