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Facile Synthesis of Monodispersed SiO2@Fe3O4 Core–Shell Colloids for Printing and Three-Dimensional Coating with Noniridescent Structural Colors
ACS Omega ( IF 3.7 ) Pub Date : 2019-01-08 00:00:00 , DOI: 10.1021/acsomega.8b02987
Dongpeng Yang 1 , Wenjie Luo 2 , Yidong Huang 2 , Shaoming Huang 1
Affiliation  

Amorphous photonic structures (APSs) with short-range ordered arrangement have attracted great interest because of their wide view angles. However, the presented methods for the APSs color printing and 3D coating on different substrates and curvatures are lack of control. Here, APSs with angle-independent structural colors were fabricated by the self-assembly of SiO2@Fe3O4 core–shell nanostructures, which were prepared by the hydrolysis of Fe(acac)3 on the silica surfaces. The size of SiO2@Fe3O4 core–shell colloids can be controlled well through the tuning of SiO2 particle size, whereas the coverage of Fe3O4 on silica surfaces can be precisely tailored through altering the mass ratio between Fe3O4 precursor and SiO2. APSs with only short-range ordered structures, uniform noniridescent structural colors, and high color visibility can be obtained through the self-assembly of SiO2@Fe3O4 colloids of different particle sizes in a few minutes. They are mainly attributed to the weak electrostatic repulsion interactions between SiO2@Fe3O4 colloids because of the partial coverage of Fe3O4 on silica surfaces and absorption of the incoherent multiple scattering of visible light from Fe3O4. Moreover, SiO2@Fe3O4 colloids show good adhesion to various substrates, such as paper, glass, plastics, resins, ceramics, and wood, which facilitates the formation of uniform APSs on different substrates. Multicolor prints and 3D coating of APSs on substrates with different curves and roughness can be realized on the basis of the fast assembly of SiO2@Fe3O4 colloids.

中文翻译:

易于合成单分散SiO 2 @Fe 3 O 4核壳胶体,用于印刷和具有非虹彩结构颜色的三维涂层

具有短程有序排列的非晶光子结构(APS)由于其宽视角而引起了极大的兴趣。然而,所提出的用于在不同基材和曲率上进行APS彩色印刷和3D涂层的方法缺乏控制。在这里,通过SiO 2 @Fe 3 O 4核-壳纳米结构的自组装,通过在二氧化硅表面上水解Fe(acac)3制备了具有独立于角度的结构颜色的APS 。通过调整SiO 2的粒径可以很好地控制SiO 2 @Fe 3 O 4核-壳胶体的大小,而Fe 3的覆盖率Ò 4在硅胶上表面可以通过改变铁之间的质量比被精确定制3 ö 4前体和SiO 2。通过在短短几分钟内自组装不同粒径的SiO 2 @Fe 3 O 4胶体,可以获得仅具有短程有序结构,均匀的非虹彩结构色和高可见度的APS 。它们主要归因于由于Fe 3 O 4的部分覆盖,SiO 2 @Fe 3 O 4胶体之间的弱斥力相互作用。在二氧化硅表面的吸收和吸收F​​e 3 O 4可见光的非相干多重散射。此外,SiO 2 @Fe 3 O 4胶体对各种基材(如纸,玻璃,塑料,树脂,陶瓷和木材)显示出良好的粘合性,这有助于在不同的基材上形成均匀的APS。通过快速组装SiO 2 @Fe 3 O 4胶体,可以在具有不同曲线和粗糙度的基材上进行APS的多色印刷和3D涂层。
更新日期:2019-01-08
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