Measurement of fluorescence in a rhodamine-123 doped self-assembled "giant" mesostructured silica sphere using a smartphone as optical hardware

John Canning; Angelica Lau; Masood Naqshbandi; Ingemar Petermann; Maxwell J Crossley

doi:10.3390/s110707055

Measurement of fluorescence in a rhodamine-123 doped self-assembled "giant" mesostructured silica sphere using a smartphone as optical hardware

Sensors (Basel). 2011;11(7):7055-62. doi: 10.3390/s110707055. Epub 2011 Jul 6.

Authors

John Canning¹, Angelica Lau, Masood Naqshbandi, Ingemar Petermann, Maxwell J Crossley

Affiliation

¹ Interdisciplinary Photonic Laboratories, School of Chemistry, The University of Sydney, NSW 2006, Australia. john.canning@sydney.edu.au

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; fluorescence; fluorescence microscopy; light-emitting diodes; mobile platforms; nanomaterials; optical diagnostics for medicine; optical instruments; optoelectronics; silica; smartphones.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cell Phone*
Computers, Handheld
Fluorescence*
Rhodamine 123 / chemistry*
Silicon Dioxide / chemistry*
Telemedicine

Substances

Rhodamine 123
Silicon Dioxide