Abstract
This study examined the photo-bleaching characteristics of oxygen-sensitive particles (OSPs) using a high-speed imaging technique. The OSPs were fabricated by a dispersion polymerization method and dipping method using porous micro spheres. Two representative oxygen indicator molecules, platinum octaethyl porphyrin (PtOEP) and platinum (II) meso-tetrakis (pentafluorophenyl) porphyrin (PtTFPP), were used to make four kinds of OSPs. A ultraviolet light emitting diode (UV-LED, M385L2, THORLABs) with a wavelength of 383 nm, a microscope with a 20X objective lens and a high-speed camera were adopted for the high-speed imaging of OSPs. The photo-bleaching characteristics of the OSPs were compared according to the time and power of UV-LED. The dispersion-polymerized OSPs had higher photostability than the porous OSPs, and the PtTFPP-embedded porous OSPs were more stable than the PtOEP-embedded porous OSPs due to the molecular structural characteristics. The dispersion-polymerized OSPs incorporated with PtOEP were more stable than the dispersion-polymerized OSPs incorporated with PtTFPP.
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Acknowledgments
This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning, Republic of Korea (No. NRF-2012R1A2A4A01008749, No. 2009-00495 and No. NRF-2013R1A1A2065648). This work was also supported by the Energy Efficiency and Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry and Energy, Republic of Korea (MCS) (No. 20132020000390).
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Kim, H.D., Yi, S.J. & Kim, K.C. Photo-bleaching characteristics of oxygen-sensitive particles. J Vis 18, 321–333 (2015). https://doi.org/10.1007/s12650-014-0244-z
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DOI: https://doi.org/10.1007/s12650-014-0244-z