Silica‐Coated Magnetite Nanoparticles Carrying a High‐Density Polymer Brush Shell of Hydrophilic Polymer,Macromolecular Rapid Communications

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Silica‐Coated Magnetite Nanoparticles Carrying a High‐Density Polymer Brush Shell of Hydrophilic Polymer
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2018-06-07 , DOI: 10.1002/marc.201800226
Yingying Cai ₁ , Wentao Peng ₁ , Serhiy Demeshko ₂ , Jia Tian ₃ , Philipp Vana ₁

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Integrating the properties of magnetite nanoparticles (MNPs) and high‐density polymer brushes in one structure requires sophisticated synthetic designs and effective chemical approaches. A simple and versatile strategy for the fabrication of hydrophilic‐polymer‐capped magnetite‐core‐silica‐shell nanohybrids with well‐defined structure employing reverse microemulsion technique and reversible addition–fragmentation chain transfer (RAFT) polymerization is presented. The high‐density polymer brush allows precise patterning of the magnetic nanohybrids with a tunable interparticle distance ranging from 20 nm to 80 nm by controlling the polymer size. The high structural precision provides a near stand‐alone state of the MNPs in the nanohybrids with effectively inhibited magnetic interaction, as shown by superconducting quantum interference device (SQUID) measurements.

中文翻译：

带有亲水聚合物的高密度聚合物刷壳的二氧化硅涂层磁铁矿纳米颗粒

将磁铁矿纳米颗粒（MNP）和高密度聚合物刷的性能整合到一个结构中，需要复杂的合成设计和有效的化学方法。提出了一种简单而通用的策略，利用反向微乳液技术和可逆加成-断裂链转移（RAFT）聚合技术，制备结构明确的亲水性聚合物封端的磁铁矿-核-硅壳纳米杂化物。通过控制聚合物的尺寸，高密度的聚合物刷可以对磁性纳米混合体进行精确的构图，并且粒子间的可调距离范围为20 nm至80 nm。较高的结构精度可在纳米杂化物中提供接近独立状态的MNP，并有效抑制了磁相互作用，

更新日期：2018-06-07

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