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Materials 2014, 7(3), 2356-2369; doi:10.3390/ma7032356
Article

Fabricating Nanoporous Silica Structure on D-Fibres through Room Temperature Self-Assembly

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1 interdisciplinary Photonics Laboratories (iPL), School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia 2 School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia 3 Graduate School of Electrical Engineering and Applied Computer Science, Federal University of Technology-Paraná, Curitiba PR 80230-901, Brazil 4 Photonics & Optical Communications, School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, NSW 2052, Australia 5 Department of Engineering, Finlandsgade 22, Aarhus University, Aarhus N 8200, Denmark 6 Department of Engineering, Macquarie University, Sydney, NSW 2109, Australia
* Author to whom correspondence should be addressed.
Received: 19 February 2014 / Revised: 6 March 2014 / Accepted: 11 March 2014 / Published: 19 March 2014
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Abstract

The room temperature deposition of self-assembling silica nanoparticles onto D-shaped optical fibres (“D-fibre”), drawn from milled preforms fabricated by modified chemical vapour deposition (MCVD), is studied. Vertical dip-and-withdraw produces tapered layers, with one end thicker (surface coverage >0.85) than the other, whilst horizontal dip-and-withdraw produces much more uniform layers over the core region. The propagation of induced fracturing over the core region during drying is overcome using a simple protrusion of the inner cladding. Thick coatings are discernible through thin film interference colouring, but thinner coatings require scanning electron microscopy (SEM) imaging. Here, we show that fluorescence imaging, using Rhodamine B, in this example, can provide some qualitative and speedy assessment of coverage.
Keywords: lab-in-a-fibre; lab-on-fibre; nanoparticles; biochemical; self-assembly; microfibers; filters; nanoreactions; sensors lab-in-a-fibre; lab-on-fibre; nanoparticles; biochemical; self-assembly; microfibers; filters; nanoreactions; sensors
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Canning, J.; Moura, L.; Lindoy, L.; Cook, K.; Crossley, M.J.; Luo, Y.; Peng, G.-D.; Glavind, L.; Huyang, G.; Naqshbandi, M.; Kristensen, M.; Martelli, C.; Town, G. Fabricating Nanoporous Silica Structure on D-Fibres through Room Temperature Self-Assembly. Materials 2014, 7, 2356-2369.

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