Li Jun, Liu Bin, Li Jinghong
Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China.
Langmuir. 2006 Jan 17;22(2):528-31. doi: 10.1021/la052519k.
The self-assembly of hybrid CdTe/poly(N-isopropylacrylamide-acrylic acid) [poly(NIPAM-AAc)] microgels was tunable in response to pH stimuli. The pH-dependent swelling behavior of the polymer microgels played an important role in the self-assembly processes. At pH 3.73, the fractal and dendritic patterns of CdTe/poly(NIPAM-AAc) were fabricated on a large scale, in which the dipole moment of CdTe provided a significant driving force. At pH 11.28, the microgels aggregated and amalgamated to form a porous film and phase separation occurred between the CdTe nanocrystals and poly(NIPAM-AAc). The combination of the physical and chemical properties of inorganic CdTe nanocrystals with those of organic smart polymers provides a new opportunity for controllable self-assembly.
混合CdTe/聚（N-异丙基丙烯酰胺-丙烯酸）[聚（NIPAM-AAc）]微凝胶的自组装可响应pH刺激进行调节。聚合物微凝胶的pH依赖性溶胀行为在自组装过程中起着重要作用。在pH 3.73时，大规模制备了CdTe/聚（NIPAM-AAc）的分形和树枝状图案，其中CdTe的偶极矩提供了显著的驱动力。在pH 11.28时，微凝胶聚集并融合形成多孔膜，CdTe纳米晶体与聚（NIPAM-AAc）之间发生相分离。无机CdTe纳米晶体与有机智能聚合物的物理和化学性质的结合为可控自组装提供了新的机会。
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