Quadruple-Responsive Nanocomposite Based on Dextran-PMAA-PNIPAM, Iron Oxide Nanoparticles, and Gold Nanorods
Quadruple-Responsive Nanocomposite Based on Dextran-PMAA-PNIPAM, Iron Oxide Nanoparticles, and Gold Nanorods
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基于葡聚糖-PMAA-PNIPAM、氧化铁纳米颗粒和金纳米棒的四重响应纳米复合材料
DOI：
10.1002/marc.201100595
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发表时间：
2012-01-27
影响因子：
4.6
通讯作者：
Fan, Xiaobin
中科院分区：
文献类型：
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作者：
Feng, Wenqian;Lv, Weipeng;Fan, Xiaobin
通过将超顺磁性氧化铁纳米颗粒（SPION）和金纳米棒（AuNR）结合到基于葡聚糖的智能共聚物网络中，获得了对温度、pH、磁场和NIR响应的四重响应纳米复合材料。通过甲基丙烯酸和N-异丙基丙烯酰胺的连续RAFT聚合，由三硫代碳酸酯基团连接到葡聚糖上，在一锅中制备双敏感共聚物。这些功能化纳米复合材料具有上级稳定性，对上述四种刺激都有很好的响应。通过UVvis和TEM测量证明，温度引起的纵向等离子体激元带的不寻常的蓝移可能是由于AuNR的侧边到侧边组装。
A quadruple-responsive nanocomposite that responds to temperature, pH, magnetic field, and NIR is obtained by incorporating superparamagnetic iron oxide nanoparticles (SPIONs) and gold nanorods (AuNRs) into a dextran-based smart copolymer network. The dual-sensitive copolymer is prepared by sequential RAFT polymerization of methacrylic acid and N-isopropylacrylamide from trithiocarbonate groups linked to dextran in one pot. These functionalized nanocomposites with superior stability can respond to the four stimuli mentioned above well. As evidenced by UVvis and TEM measurements, the temperature-induced unusual blue-shift in the longitudinal plasmon band is possibly due to the side-to-side assembly of AuNRs.