Sepúlveda Adolfo, Picard-Lafond Audrey, Marette André, Boudreau Denis
Département de Biochimie, de Microbiologie et de bio-Informatique, Université Laval, Québec, QC G1V 0A6, Canada.
Centre D'optique, Photonique et Laser (COPL), Université Laval, Québec, QC G1V 0A6, Canada.
Polymers (Basel). 2021 Jan 26;13(3):373. doi: 10.3390/polym13030373.
The implementation of gold-hydrogel core-shell nanomaterials in novel light-driven technologies requires the development of well-controlled and scalable synthesis protocols with precisely tunable properties. Herein, new insights are presented concerning the importance of using the concentration of gold cores as a control parameter in the seeded precipitation polymerization process to modulate-regardless of core size-relevant fabrication parameters such as encapsulation yield, particle size and shrinkage capacity. Controlling the number of nucleation points results in the facile tuning of the encapsulation process, with yields reaching 99% of gold cores even when using different core sizes at a given particle concentration. This demonstration is extended to the encapsulation of bimodal gold core mixtures with equally precise control on the encapsulation yield, suggesting that this principle could be extended to encapsulating cores composed of other materials. These findings could have a significant impact on the development of stimuli-responsive smart materials.
在新型光驱动技术中实现金-水凝胶核壳纳米材料的应用，需要开发具有精确可调性质的可控且可扩展的合成方案。本文提出了新的见解，即关于在种子沉淀聚合过程中使用金核浓度作为控制参数的重要性，以调节（无论核尺寸如何）诸如包封率、粒径和收缩能力等相关制备参数。控制成核点的数量可实现对包封过程的轻松调节，即使在给定颗粒浓度下使用不同的核尺寸，包封率也能达到99%的金核。这一论证扩展到了对双峰金核混合物的包封，且对包封率有同样精确的控制，这表明该原理可扩展到对由其他材料组成的核的包封。这些发现可能会对刺激响应智能材料的开发产生重大影响。
