期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 5, 页码 1751-1757出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm15202e
关键词
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资金
- Spanish Ministry of Science and Innovation [MAT2008-02166, MAT2011-23593, MAT2010-19827]
- Junta de Andalucia [FQM3579, FQM5247]
- CONSOLIDER HOPE [CSD2007-00007]
- Generalitat Valenciana [PROMETEO 2009/058]
Herein we demonstrate improved mass transport through nano-particle one-dimensional photonic crystals of enhanced porosity. Analysis is made by impedance spectroscopy using iodine and ionic liquid based electrolytes and shows that newly created large pores and increased porosity improve the diffusion of species through the photonic crystal. This achievement is based on the use of a polymeric porogen (polyethylene glycol), which is mixed with the precursor suspensions used for the deposition of nanoparticle TiO2 and SiO2 layers and then eliminated to generate a more open interconnected void network, as confirmed by specular reflectance porosimetry. A compromise between pore size and optical quality of these periodic structures is found.
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