1 July 2015 Absorption and fluorescence spectroscopy on a smartphone
Author Affiliations +
Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96551Z (2015) https://doi.org/10.1117/12.2184354
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of
A self-powered smartphone-based field-portable “dual” spectrometer has been developed for both absorption and fluorescence measurements. The smartphone’s existing flash LED has sufficient optical irradiance to undertake absorption measurements within a 3D-printed case containing a low cost nano-imprinted polymer diffraction grating. A UV (λex ~ 370 nm) and VIS (λex ~ 450 nm) LED are wired into the circuit of the flash LED to provide an excitation source for fluorescence measurements. Using a customized app on the smartphone, measurements of absorption and fluorescence spectra are demonstrated using pH-sensitive and Zn2+-responsive probes. Detection over a 300 nm span with 0.42 nm/pixel spectral resolution is demonstrated. Despite the low cost and small size of the portable spectrometer, the results compare well with bench top instruments.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Md. Arafat Hossain, Md. Arafat Hossain, John Canning, John Canning, Kevin Cook, Kevin Cook, Sandra Ast, Sandra Ast, Peter J. Rutledge, Peter J. Rutledge, Abbas Jamalipour, Abbas Jamalipour, } "Absorption and fluorescence spectroscopy on a smartphone", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96551Z (1 July 2015); doi: 10.1117/12.2184354; https://doi.org/10.1117/12.2184354

Back to Top