Anisotropic responsive microgels with tuneable shape and interactions
Anisotropic responsive microgels with tuneable shape and interactions
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DOI：
10.1039/c5nr03827h
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发表时间：
2015-01-01
期刊：
影响因子：
6.7
通讯作者：
Schurtenberger, Peter
中科院分区：
文献类型：
--
作者：
Crassous, Jerome J.;Mihut, Adriana M.;Schurtenberger, Peter
合成了高度单分散的聚苯乙烯/聚(N-异丙基甲基丙烯酰胺)(PS-PNIPMAM)核壳复合微凝胶，并进一步将其制成椭圆形、多面体和碗状纳米粒子。除了形状上的各向异性，微凝胶设计还可以使用温度作为外部控制变量来精确控制颗粒的构象、大小和相互作用，从膨胀和亲水到坍塌和疏水。首先介绍了不同颗粒的后处理过程和表征。进一步证明了它们作为研究各向异性形状和相互作用对相行为影响的模型系统的潜力。最后讨论了碗状复合微凝胶粒子的自组装，其中温度和外加交流电场分别控制相互作用从排斥到吸引和从软排斥到偶极。
Highly monodisperse polystyrene/poly(N-isopropylmethacrylamide) (PS-PNIPMAM) core-shell composite microgels were synthesized and further nanoengineered in either ellipsoidal, faceted or bowl-shaped particles. Beside their anisotropy in shape, the microgel design enables an exquisite control of the particle conformation, size and interactions from swollen and hydrophilic to collapsed and hydrophobic using temperature as an external control variable. The post-processing procedures and the characterization of the different particles are first presented. Their potential as model systems for the investigation of the effects of anisotropic shape and interactions on the phase behavior is further demonstrated. Finally, the self-assembly of bowl-shaped composite microgel particles is discussed, where the temperature and an external AC electric field are employed to control the interactions from repulsive to attractive and from soft repulsive to dipolar, respectively.