Magnetic Compression of Polyelectrolyte Microcapsules for Controlled Release

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• 作者：Yanan Hu ; Chuanyong Liu ; Dongzhi Li ; Yue Long ; Kai Song ; Chen-Ho Tung
• 刊名：Langmuir
• 出版年：2015
• 出版时间：October 20, 2015
• 年：2015
• 卷：31
• 期：41
• 页码：11195-11199
• 全文大小：286K
• ISSN：1520-5827

文摘

In this study, microcapsules with a magnetic particle as the core and polyelectrolyte multilayers as the shell were fabricated. The cavity of the microcapsules was created by etching the SiO₂ layer, which was first coated on the magnetic core particle, and the size of the cavity can be adjusted by the thickness of the SiO₂ layer. This magnetically responsive microcapsule deforms upon application of a constant magnetic field and results in the release of the core content, and the release velocity could be controlled by the strength of the magnetic field. This release mechanism is proactive and repeatable, combined with its localized and remote controllability; it can be a powerful tool for delivering medical agents on site.