Synthesis of a Colloidal Molecule from Soft Microgel Spheres.
Synthesis of a Colloidal Molecule from Soft Microgel Spheres.
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DOI：
10.1021/acsmacrolett.6b00187
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发表时间：
2016-04
影响因子：
5.8
通讯作者：
Q. Yuan;Jianjun Gu;Ya-nan Zhao;Lijuan Yao;Ying Guan;Yongjun Zhang
中科院分区：
文献类型：
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作者：
Q. Yuan;Jianjun Gu;Ya-nan Zhao;Lijuan Yao;Ying Guan;Yongjun Zhang
胶体团簇或胶体分子是比胶体球更强大的模型系统和构建模块;然而，它们的合成仍然是一个巨大的挑战。此外，迄今为止，仅合成了由硬球组成的胶体分子。在这里，我们报告的软聚（N-异丙基丙烯酰胺）（PNIPAM）微凝胶球的胶体簇的合成。微凝胶球首先组装成高度有序的胶体晶体。然后通过原位硫醇-烯反应，将表面带有乙烯基的球与周围带有硫醇基的球共价键合。得到的簇由13个微凝胶球组成，其中1个乙烯基改性的球在中心，12个硫醇改性的周围协调。它们的大小可以通过改变温度来调节。初步测试表明，它们可以作为微凝胶球聚集成树枝状结构的核。
Colloidal clusters, or colloidal molecules, are more powerful model systems and building blocks than colloidal spheres; however, their synthesis still remains a huge challenge. In addition, only colloidal molecules composed of hard spheres were synthesized up to now. Here we report the synthesis of a colloidal cluster from soft poly(N-isopropylacrylamide) (PNIPAM) microgel spheres. The microgel spheres were first assembled into highly ordered colloidal crystals. Spheres with surface vinyl groups were then covalently bonded with the surrounding spheres with surface thiol groups via in situ thiol-ene reaction. The resulting clusters consist of 13 microgel spheres with 1 vinyl-modified sphere in the center and 12 thiol-modified ones coordinated around. Their size can be tuned by changing temperature. A preliminary test suggests that they can act as nuclei for microgel spheres to aggregate into dendritic structures.