Organic/inorganic heterostructures templated by interfacial instability-driven BCP colloids in deformable emulsion droplets†

IF 2.9 3区 化学 Q3 CHEMISTRY, PHYSICAL
Soft Matter Pub Date : 2024-10-01 DOI:10.1039/D4SM00921E
Yuqing Song, Nan Yan, Lingli Wan, Jingjing Li and Ye Gao
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Abstract

Hybrid heterostructure materials have received considerable attention due to the integration of each component and abundant functional applications in micromotors, catalysis, photothermal therapy, drug delivery, and bioimaging. However, the preparation of organic/inorganic heterostructure nanoparticles (HSNPs) with high quality still remains a remarkable challenge since thermodynamically metastable structures usually coexist, resulting in a lack of organic scaffolds with extreme uniformity both in shape and size distribution. Here, we prepared polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) block copolymer (BCP) core–shell spherical colloids driven by interfacial instability of soft and deformable emulsion droplets. Ultra-low interfacial tension was achieved through the co-adsorption of BCP segments and sodium dodecyl sulfate (SDS) surfactant, which had a strong affinity with the P4VP segment at the interface of the emulsified droplets. The excellent and homogeneous BCP colloids were further utilized as organic scaffolds to selectively grow a functional SiO2 layer on the surface of the BCP spherical colloids, producing BCP/SiO2 HSNPs with highly uniform shape and size distribution originating from the PS-b-P4VP scaffolds, thus providing an efficient and general strategy to construct and design organic/inorganic HSNPs with diverse applications.

Abstract Image

可变形乳液液滴中由界面不稳定性驱动的 BCP 胶体模板化的有机/无机异质结构。
杂化异质结构材料因各组分的整合以及在微电机、催化、光热治疗、药物输送和生物成像等领域的丰富功能应用而备受关注。然而,制备高质量的有机/无机异质结构纳米颗粒(HSNPs)仍然是一个巨大的挑战,因为热力学上的可陨落结构通常是共存的,这导致缺乏在形状和尺寸分布上都极其均匀的有机支架。在此,我们制备了聚苯乙烯-嵌段聚合物-聚(4-乙烯基吡啶)(PS-b-P4VP)嵌段共聚物(BCP)核壳球形胶体,其驱动力来自柔软且可变形的乳液液滴的界面不稳定性。通过 BCP 段和十二烷基硫酸钠(SDS)表面活性剂的共同吸附,实现了超低的界面张力,SDS 与乳化液滴界面上的 P4VP 段具有很强的亲和力。这种优异而均匀的 BCP 胶体被进一步用作有机支架,在 BCP 球形胶体表面选择性地生长出功能性 SiO2 层,从而制备出源自 PS-b-P4VP 支架的形状和尺寸分布高度均匀的 BCP/SiO2 HSNPs,从而为构建和设计具有多种应用的有机/无机 HSNPs 提供了一种高效而通用的策略。
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来源期刊
Soft Matter
Soft Matter 工程技术-材料科学:综合
CiteScore
6.00
自引率
5.90%
发文量
891
审稿时长
1.9 months
期刊介绍: Where physics meets chemistry meets biology for fundamental soft matter research.
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