Absorption and fluorescence spectroscopy on a smartphone

Publisher:
SPIE
Publication Type:
Conference Proceeding
Citation:
Proceedings of SPIE - The International Society for Optical Engineering, 2015, 9655
Issue Date:
2015-01-01
Full metadata record
Files in This Item:
Filename Description Size
Absorptionandfluorescencespectroscopyonasmartphone.pdfPublished version611.45 kB
Adobe PDF
© 2015 Copyright SPIE. 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 (λ < inf > ex < /inf > ∼ 370 nm) and VIS (λ < inf > ex < /inf > ∼ 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 Zn < sup > 2+ < /sup > -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.
Please use this identifier to cite or link to this item: