Morphology-controlled magnetite nanoclusters via polyethyleneimine-mediated solvothermal process

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• 作者：Saowaluk Chaleawlert-umpon ; Nuttaporn Pimpha ; ^{Nuttaporn@nanotec.or.th}
• 关键词：Magnetite nanoclusters ; Solvothermal ; Polyethyleneimine
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 期刊代码：58_02540584
• 类别：ms
• 出版时间：16 July, 2012
• 卷：135
• 期：1
• 页码：1-5
• 文件大小：628 K

摘要

A facile one-pot synthesis of polyethyleneimine (PEI)-functionalized magnetic nanoclusters (MNPs) through the solvothermal method was reported for various applications. The morphology of the MNPs can be systematically tuned from loose flower-like to porous nanoclusters by controlling the pH of the PEI stabilizer. At low pH, the intense electrostatic repulsion according to the large amount of protonated amine groups of PEI would play a key role on self-assembly process to generate the loose nanostructure. Due to the presence of amine functional groups on the surface, these nanoclusters provide high degree of dispersibility in water and abundant anchoring groups for further attachment of biomolecules. Magnetization study of the MNPs indicated that they had saturated magnetization upto 80聽emu聽g^鈭?.