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Sensors 2011, 11(7), 7055-7062; doi:10.3390/s110707055
Article

Measurement of Fluorescence in a Rhodamine-123 Doped Self-Assembled “Giant” Mesostructured Silica Sphere Using a Smartphone as Optical Hardware

1,2,* , 1,2
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 and 2
1 Interdisciplinary Photonic Laboratories (iPL), School of Chemistry, The University of Sydney, NSW 2006, Australia 2 School of Chemistry, The University of Sydney, NSW 2006, Australia
* Author to whom correspondence should be addressed.
Received: 18 May 2011 / Revised: 17 June 2011 / Accepted: 21 June 2011 / Published: 6 July 2011
(This article belongs to the Section Physical Sensors)
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Abstract

The blue OLED emission from a mobile phone was characterised, revealing a sharp emission band centred at λ = 445 nm with a 3dB bandwidth Δλ ~ 20 nm. It was used to excite Rhodamine 123 doped within a “giant” mesostructured silica sphere during fabrication through evaporative self-assembly of silica nanoparticles. Fluorescence was able to be detected using a standard optical microscope fitted with a green transmission pass filter and cooled CCD and with 1 ms exposure time demonstrating the potential of mobile platforms as the basis for portable diagnostics in the field.
Keywords: biological sensing and sensors; optical diagnostics for medicine; fluorescence; optoelectronics; light-emitting diodes; fluorescence microscopy; nanomaterials; silica; optical instruments; smartphones; mobile platforms biological sensing and sensors; optical diagnostics for medicine; fluorescence; optoelectronics; light-emitting diodes; fluorescence microscopy; nanomaterials; silica; optical instruments; smartphones; mobile platforms
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.; Lau, A.; Naqshbandi, M.; Petermann, I.; Crossley, M.J. Measurement of Fluorescence in a Rhodamine-123 Doped Self-Assembled “Giant” Mesostructured Silica Sphere Using a Smartphone as Optical Hardware. Sensors 2011, 11, 7055-7062.

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