Absorption and fluorescence spectroscopy on a smartphone
- Publication Type:
- Conference Proceeding
- Proceedings of SPIE - The International Society for Optical Engineering, 2015, 9655
- Issue Date:
|Absorptionandfluorescencespectroscopyonasmartphone.pdf||Published version||611.45 kB|
Copyright Clearance Process
- Recently Added
- In Progress
- Closed Access
This item is closed access and not available.
© 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
ex ∼ 370 nm) and VIS (λ ex ∼ 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.
Please use this identifier to cite or link to this item: