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Hiroki Kondo,Masaru Hori,Mineo Hiramatsu 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
Morphology and crystallinity control of carbon nanowalls were investigated in this study. Precise measurements and controls of radicals and ions in the plasma make the controlled syntheses of carbon nanowalls (CNWs) possible. For example, with increasing the O₂ partial pressure adding to the growth ambient, the CNWs densities decrease, and their crystallinity increases. On the other hand, the density of Pt nanoparticles supported on the CNWs by scCO2 can be developed by control of CNW’s crystallinity. These results obtained in this study suggest that the CNWs are promising as new functional device materials in various applications.
Masafumi Ito,Takayuki Ohta,Masaru Hori 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.6
Recently, many kinds of non-equilibrium atmospheric-pressure plasma sources have been developed for medical and agricultural applications. Some sources have been applied to agricultural crops and foods for the inactivation of microorganisms and the acceleration of seed germination and crop growth. In this article, the applications of plasmas to disinfection of agricultural crops and foods are reviewed. Then, a high-density non-equilibrium atmospheric pressure plasma (NEAPP) applied for inactivating fungal spores of Penicillium digitatum, a difficult-to-inactivate food spoilage microorganism, is introduced as an environmentally safe and rapid inactivation method. The NEAPP employing Ar gas has a high electron density on the order of 1015 cm−3. The spores were successfully inactivated with a decimal reduction time in spores (D value) of 1.7 min. The contributions of ozone and UV radiation to the inactivation of the spores were evaluated and concluded not to be dominant. Therefore, the significance of neutral reactive species is suggested in the rapid inactivation using NEAPP.