Battery-triggered open wireless electrochemiluminescence in a microfluidic cloth-based bipolar device.

In this work, we firstly report a novel battery-triggered open wireless electrochemiluminescence (O-WL-ECL) sensing strategy based on the microfluidic cloth-based bipolar devices (μCBPDs). The carbon ink-screen-printing is used to fabricate the bipolar electrodes (BPEs) and driving electrodes on the cloth which is patterned with wax-screen-printed hydrophilic channels to create low-cost sensors ($0.011 per device) which can be powered with a rechargeable battery and read with an inexpensive, portable charge coupled device (CCD) camera. Moreover, the widely-used luminol/hydrogen peroxide (H 2 O 2 ) ECL reaction has been performed to illustrate the quantitative ability of the O-WL-ECL μCBPDs. Under optimized conditions, the μCBPDs can achieve the measurement of H 2 O 2 , with a linear range of 0.025–10 mM and a detection limit of 0.024 mM. Additionally, the determination of glucose can be carried out in the linear range from 0.025 mM to 10 mM, with a detection limit of 0.023 mM. It has been shown that the O-WL-ECL on μCBPDs has an acceptable sensitivity, stability and reproducibility. Finally, this simple and cost-effective device is successfully applied for the measurements of H 2 O 2 in milk and glucose in clinical urine and serum samples. Therefore, the proposed methodology could provide great promise in applications in many areas, and may facilitate the achievement of point-of-care testing. [ABSTRACT FROM AUTHOR]