Istituto per lo Studio delle Macromolecole, CNR-ISMAC, Via Bassini 15, 20133 Milano, Italy.
ACS Appl Mater Interfaces. 2012 Nov;4(11):6071-9. doi: 10.1021/am301709b. Epub 2012 Oct 24.
Structural colors are the object of a wide scientific interest, not only for the potential technical applications of their intriguing optical properties but also for the need of coloring agents to replace toxic and carcinogenic dyes. We present a simple methodology to obtain polymer opal surfaces of self-assembled core-shell nanoparticles with different degree of order for structural color applications. Polymer nanospheres prepared by surfactant-free emulsion radical copolymerization of an hydrophobic and an hydrophilic comonomer (styrene and methacrylic acid) spontaneously assemble into core-shell particles. Nanoparticles with identical composition and different diameters were prepared by modulating the degree of ionization of the weakly acidic comonomer. We report experimental results revealing how the synthesis parameters affect the properties of the core-shell particles and their influence on the optical properties of the final polymer opal surfaces, which depend on size, charge, and packing arrangement of the constituent nanoparticles.
结构色是广泛的科学研究对象，不仅因为其有趣的光学特性具有潜在的技术应用，还因为需要替代有毒和致癌染料的着色剂。我们提出了一种简单的方法来获得具有不同程度有序性的自组装核壳纳米粒子的聚合物蛋白石表面，以用于结构色应用。通过无表面活性剂乳液自由基共聚的疏水性和亲水性单体（苯乙烯和甲基丙烯酸）制备的聚合物纳米球自发组装成核壳颗粒。通过调节弱酸性共聚单体的离解度来制备具有相同组成和不同直径的纳米颗粒。我们报告了实验结果，揭示了合成参数如何影响核壳颗粒的性质及其对最终聚合物蛋白石表面光学性质的影响，这取决于组成纳米颗粒的尺寸、电荷和堆积排列。
