Won Jung Yoon

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PURPOSE We present the regenerative label-free fiber optical biosensor that exploits surface plasmon resonance for quantitative detection of fibrinogen (Fbg) extracted from human blood plasma. MATERIALS AND METHODS The sensor head was made up of a multimode optical fiber with its polymer cladding replaced by metal composite of nanometer thickness made of(More)
Syndiotactic polystyrene (sPS) is a semicrystalline polymer having excellent heat and chemical resistances. In our previous work of liquid slurry polymerization of styrene with a silica-supported Cp*Ti(OMe)3/MAO catalyst [1, 2], fibrillar or worm-like structures were observed. Such morphology is quite different from the multi-grain morphology commonly(More)
We demonstrate a simple and efficient method for separating metallic from semiconducting single-walled carbon nanotubes (SWNTs) using density-gradient ultracentrifugation. Density differences between metallic and semiconducting SWNTs, which enable SWNT separation by electronic type, are created using a single surfactant, i.e., sodium dodecyl sulfate (SDS),(More)
We examine the modulation effects of thicknesses of both a photoactive layer (a bulk-heterojunction (BHJ) of poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM)) and an optical spacer of a transparent metal oxide, for power conversion efficiency optimization of organic photovoltaic devices. The redistribution of the optical(More)
Recently, quantum dot (QD) has been used widely in the field of bio assay including cell imaging, biomarker, and fluorescence resonance energy transfer (FRET) sensor. The DNA assay without labeling process has several advantages including low cost, short time, and simplicity. Microbeads of agarose, glass, and polystyrene have been used as a solid support in(More)
−Complex reaction kinetics and mechanisms, physical changes and transport effects, non-ideal mixing, and strong process nonlinearity characterize polymerization processes. Polymer reaction engineering is a discipline that deals with various problems concerning the fundamental nature of chemical and physical phenomena in polymerization processes.(More)
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