Formation of Photosensitizing Crystalline C₆₀ Particles by Ink-Jet Method

Masahito Ban, Fusako Sasaki

Systems Engineering Major, Graduate School, Nippon Institute of Technology, Saitama, Japan.

DOI: 10.4236/wjnse.2012.22014                

Abstract

The crystalline fullerene C₆₀ particles were formed and immobilized on poly(dimethylsiloxane) (PDMS) substrates under the various discharge conditions by an ink-jet method, and investigated for the reactive oxygen species (ROS) generation property under visible light irradiation. The particles were synthesized by discharging a toluene solution dissolved C₆₀ and poly(methyl methacrylate) (PMMA) with the ink-jet spotting system. The ROS generation was evaluated by comparisons of the fluorescence intensities measured for the formed particles under green laser irradiation and in a dark room using fluorescent dyes, 2’,7’-dichlorofluorescein diacetate and dihydroethidium. The results of transmission electron microscope (TEM) observation showed that the formed particles consisted of crystalline C₆₀. The optimal ink-jet discharge conditions for synthesizing the particles to generate more ROS were found. In the case of the optimal conditions, the structure in which the needle-like particles were three-dimensionally formed was confirmed. The surface area of the crystalline C₆₀ particles was calculated using the SEM observation results, and it was suggested that when the needle-like finer particles were three-dimensionally formed under the optimal conditions, increasing the surface area lead to an increase in the ROS generation amount.

Keywords

Fullerene; Particle; Ink-Jet; Reactive Oxygen Species

Conflicts of Interest

The authors declare no conflicts of interest.

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