Kim, Keunsuk Kim, Tae Hwan Choi, Jin Hee Lee, Jae Yeol Hah, Sang Soo Yoo, Hyun-Oh Hwang, Seung Sang Ryu, Kyeong Nam Kim, Hyeong Joong Kim, Jungahn 2024-01-20T19:05:12Z 2024-01-20T19:05:12Z 2021-09-02 2010-05-17 1022-1352 https://pubs.kist.re.kr/handle/201004/131444 PEO-based amphiphilic block copolymers that exhibit a pH responsive phase transition behavior are synthesized. The amphiphilic block copolymers show sharp phase transitions in the physiological pH (7.2) range of aqueous media. The block copolymers were efficient stabilizers for the preparation of superparamagnetic iron oxide nanoparticles in aqueous media. The resulting iron oxide nanoparticles in the size range of 5-30 nm showed a relatively good 7.2 image on the basis of the results on their phantom test. All the materials were characterized by the combination of H-1 NMR spectroscopy, size exclusion chromatography, UV/visible spectroscopic analysis, magnetization, transmission electron microscopy, electron diffraction, and X-ray diffraction pattern analysis. English WILEY-V C H VERLAG GMBH MAGNETIC NANOPARTICLES POLY(N-VINYLIMIDAZOLE) HYDROGELS RESONANCE DELIVERY DESIGN POLYMERIZATION RELEASE SURFACE Synthesis of a pH-Sensitive PEO-Based Block Copolymer and its Application for the Stabilization of Iron Oxide Nanoparticles Article 10.1002/macp.200900528 1 MACROMOLECULAR CHEMISTRY AND PHYSICS, v.211, no.10, pp.1127 - 1136 MACROMOLECULAR CHEMISTRY AND PHYSICS 211 10 1127 1136 scie scopus 000278484800006 2-s2.0-77952636389 Polymer Science Polymer Science Article MAGNETIC NANOPARTICLES POLY(N-VINYLIMIDAZOLE) HYDROGELS RESONANCE DELIVERY DESIGN POLYMERIZATION RELEASE SURFACE ampiphiles block copolymers MR imaging contrast agent reversible addition-fragmentation chain transfer (RAFT) superparamagnetic iron oxide nanoparticles