Packed Colloidal Phases Mediate the Synthesis of Raspberry-Structured Microgel Heteroaggregates
Packed Colloidal Phases Mediate the Synthesis of Raspberry-Structured Microgel Heteroaggregates
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DOI：
10.1021/mz300640e
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发表时间：
2013-04-01
影响因子：
7.015
通讯作者：
Lyon, L. Andrew
中科院分区：
文献类型：
--
作者：
Gaulding, Jeffrey C.;Saxena, Shalini;Lyon, L. Andrew
具有复杂结构的混合纳米颗粒联合收割机结合了两种不同材料的特性，并将它们整合在一起，以协同方式为组装体提供新的特性。在这项工作中，我们展示了用响应性微凝胶装饰各种微米大小的“核心”颗粒表面的能力，形成树莓状颗粒。我们使用的模板技术，其中微凝胶涂层是从高体积分数的胶体相，导致高表面覆盖率和增强的胶体稳定性的所得颗粒。浓缩的胶体分散体能够通过特异性和非特异性相互作用驱动微凝胶/核心组合，并且相对于稀释的杂聚集体提供改进的覆盖。这种方法用途广泛，可以改变核心材料和微凝胶相，同时仍然保持有效。虽然回收的颗粒被高度稀释，但在乌藨子样颗粒分离后再循环未掺入的微凝胶并重整填充的胶体组装体允许多个循环的颗粒合成，这提高了总产率。
Hybrid nanoparticles with complex architectures combine the properties of two distinct materials and integrate them to synergistically provide new characteristics to the assembly. In this work we demonstrate the ability to decorate the surface of a variety of micrometer-sized "core" particles with responsive microgels, forming raspberry-like particles. We use a templating technique wherein the microgel coating is applied from a high-volume-fraction colloidal phase, leading to high surface coverage and enhanced colloidal stability of the resultant particles. Concentrated colloidal dispersions enable microgel/core combinations driven by both specific and nonspecific interactions and offer improved coverage relative to dilute heteroaggregation. This approach is versatile and allows both the core material and microgel phase to be altered while still remaining effective. Though the recovered particles are highly diluted, recycling the unincorporated microgels following raspberry-like particle isolation and reforming the packed colloidal assembly allow multiple cycles of particle synthesis, which improves overall yield.