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Mobile phone-based electrochemiluminescence sensing exploitingthe ‘USB On-The-Go’ protocol
journal contributionposted on 2023-05-18, 13:38 authored by Doeven, EH, Barbante, GJ, Harsant, AJ, Donnelly, PS, Connell, TU, Hogan, D, Francis, PS
A low-cost system to generate, control and detect electrochemiluminescence using a mobile smartphone is described. A simple tone-detection integrated circuit is used to switch power sourced from the phone's Universal Serial Bus (USB) ‘On-The-Go’ (OTG) port, using audible tone pulses played over the device's audio jack. We have successfully applied this approach to smartphones from different manufacturers and with different operating system versions. ECL calibrations of a common luminophore, tris(2,2′-bipyridine)ruthenium(II) ([Ru(bpy)3]2+), with 2-(dibutylamino)ethanol (DBAE) as a co-reactant, showed no significant difference in light intensities when an electrochemical cell was controlled by a mobile phone in this manner, compared to the same calibration generated using a conventional potentiostat. Combining this novel approach to control the applied potential with the measurement of the emitted light through the smart phone camera (using an in-house built Android app), we explored the ECL properties of a water-soluble iridium(III) complex that emits in the blue region of the spectrum. The iridium(III) complex exhibited superior co-reactant ECL intensities and limits of detection to that of the conventional [Ru(bpy)3]2+ luminophore.
Publication titleSensors and Actuators B: Chemical
Department/SchoolSchool of Natural Sciences
PublisherElsevier Science Sa
Place of publicationPo Box 564, Lausanne, Switzerland, 1001
Rights statementCopyright 2015 Elsevier B.V.