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Double Replication of Silica Colloidal Crystal Films
ACS Applied Materials & Interfaces ( IF 9.5 ) Pub Date : 2017-11-21 00:00:00 , DOI: 10.1021/acsami.7b12662
Jennifer L. Russell 1 , Thomas E. Mallouk 1
Affiliation  

Inverse opals made by polymerizing vinyl monomers inside a colloidal crystal have lattice dimensions that are contracted relative to the original hard template. This effect was studied in order to investigate the possibility of making double replicas of varying pore sizes from different materials, and to gain a better understanding of the polymer contraction behavior during replication. The degree of lattice contraction was measured using colloidal crystal films formed from silica spheres with diameters in the range 33–225 nm, and polymers pEDMA [poly(1,2-ethanediol dimethacrylate)], pDVB [poly(divinylbenzene)], pHDMA [poly(1,6-hexanediol dimethacrylate)], pBDMA [poly(1,4-butanediol dimethacrylate)], and a 5:4 copolymer mixture of pEDMA/pDVB. The degree of lattice contraction depended on the alkyl chain length of the monomer, as well as the degree of cross-linking, with up to 32% contraction observed for pEDMA when the silica template was removed. However, filling the polymer inverse opals with silica or titania returned the lattice spacing closer to its original size, an effect that can be rationalized in terms of the driving forces for contraction. Double replication of both single-component and binary silica colloidal crystals therefore generated silica and titania replicas of the original lattice. Thus, double replication provides a pathway for accessing periodic structures that are difficult to synthesize directly from materials such as titania.

中文翻译:

二氧化硅胶体晶体膜的双重复制

通过在胶体晶体内部聚合乙烯基单体制成的反蛋白石具有相对于原始硬模板收缩的晶格尺寸。为了研究由不同材料制成孔径不同的双复制品的可能性,并更好地了解复制过程中的聚合物收缩行为,对这种效果进行了研究。使用由直径在33-225 nm范围内的二氧化硅球形成的胶体晶体膜和聚合物pEDMA [聚(1,2-乙二醇二甲基丙烯酸酯)],pDVB [聚(二乙烯基苯)],pHDMA [聚(1,6-己二醇二甲基丙烯酸酯),pBDMA [聚(1,4-丁二醇二甲基丙烯酸酯)]和pEDMA / pDVB的5:4共聚物混合物。晶格收缩的程度取决于单体的烷基链长,以及交联度,当去除二氧化硅模板时,pEDMA的收缩率高达32%。但是,用二氧化硅或二氧化钛填充聚合物反蛋白石会使晶格间距更接近其原始尺寸,这种效果可以根据收缩的驱动力来合理化。因此,单组分和二元二氧化硅胶体晶体的双重复制产生了原始晶格的二氧化硅和二氧化钛复制品。因此,双重复制提供了访问难以直接从诸如二氧化钛之类的材料合成的周期性结构的途径。用二氧化硅或二氧化钛填充聚合物反蛋白石会使晶格间距更接近其原始尺寸,这种效果可以根据收缩的驱动力来合理化。因此,单组分和二元二氧化硅胶体晶体的双重复制产生了原始晶格的二氧化硅和二氧化钛复制品。因此,双重复制提供了访问难以直接从诸如二氧化钛之类的材料合成的周期性结构的途径。用二氧化硅或二氧化钛填充聚合物反蛋白石会使晶格间距更接近其原始尺寸,这种效果可以根据收缩的驱动力来合理化。因此,单组分和二元二氧化硅胶体晶体的双重复制产生了原始晶格的二氧化硅和二氧化钛复制品。因此,双重复制提供了访问难以直接从诸如二氧化钛之类的材料合成的周期性结构的途径。
更新日期:2017-11-22
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