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  • 02월 22일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Preparation of Magnetic Hybrid Copolymer-Cobalt Hierarchical Hollow Spheres by Localized Ostwald Ripening

등록일
2008년 2월 14일 15시 08분 23초
접수번호
1405
발표코드
29P95포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅴ>
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
Ru Qiao, Xiao Li Zhang, 강영수1, 김주창
부경대학교 화학과,
1서강대학교 화학과,
We report a one-step solvothermal method to prepare magnetic hybrid copolymer-Co hierarchical hollow spheres by localized Ostwald ripening. The initial stage is the aggregation of primary inorganic nanoparticles whose surfaces are partially adsorbed by copolymer PEG-PPG-PEG to form solid spheres, and followed by hollowing of the core and the progressive matter redistribution from the interior to the exterior. Meanwhile, amorphous inorganic particles grow to cubic crystallites. Finally, a hollow spherical architecture with an extensively roughened surface is obtained by this self-transformation. When decreasing the mass of NaOH from 7.5 mmol to 2.5 mmol, a morphology transformation from porous hollow spheres to double-wall spheres and then to single-wall spheres with platelet-like building units aligned disorderly on the outer surfaces is observed, and this morphology transformation is related to Ostwald ripening.

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