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Issue 5, 2012
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Enhanced diffusion through porous nanoparticle optical multilayers

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Herein we demonstrate improved mass transport through nanoparticle 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.

Graphical abstract: Enhanced diffusion through porous nanoparticle optical multilayers

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Publication details

The article was received on 13 Oct 2011, accepted on 21 Nov 2011 and first published on 19 Dec 2011

Article type: Communication
DOI: 10.1039/C1JM15202E
Citation: J. Mater. Chem., 2012,22, 1751-1757

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    Enhanced diffusion through porous nanoparticle optical multilayers

    C. López-López, S. Colodrero, S. R. Raga, H. Lindström, F. Fabregat-Santiago, J. Bisquert and H. Míguez, J. Mater. Chem., 2012, 22, 1751
    DOI: 10.1039/C1JM15202E

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