期刊
SMALL
卷 3, 期 8, 页码 1445-1451出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.200700084
关键词
thin films; Bragg stacks; self-cleaning; superhydrophilicity
Thin-film Bragg stacks exhibiting structural color have been fabricated by a laver-by-layer (LbL) deposition process involving the sequential adsorption of nanoparticles and polymers. High- and low-refractive-index regions of quarter-wave stacks were generated by calcining LbL-assembled multilayers containing TiO2 and SiO2 nanoparticles, respectively. The physical attributes of each region were characterized by a recently developed ellipsometric method. The structural color characteristics of the resultant nanoporous Bragg stacks could be precisely tuned in the visible region by varying the number of stacks and the thickness of the high- and low-refractive-index stacks. These Bragg stacks also exhibited potentially useful superhydrophilicity and self-cleaning properties.
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