Portable Electrochemical Sensing System Attached to Smartphones and Its Incorporation with Paper-based Electrochemical Glucose Sensor

Takuya Fujimoto, Shogo Kawahara, Yukio Fuchigami, Shoji Shimokawa, Yosuke Nakamura, Kenichi Fukayama, Masao Kamahori, Shigeyasu Uno


This paper described the development of a small and low cost biosensor consisting of a smartphone-based electrochemical biosensor device and a paper-based biosensor. The device harvested power from the smartphone and transferred data through audio jack. We designed CMOS circuits including a power supply circuit, a potentiostat, and a ΔΣ modulator. The fabrication of a paper-based biosensor was simple: the three electrodes were directly drawn on chromatography paper using a carbon pencil. The paper-based biosensor was low cost, disposable, portable and friendly to the environment. The sensing system was designed to perform the chronoamperometry measurement, and the glucose concentration in a liquid specimen was detected. Results showed that the sensing system was capable of measuring the glucose concentration as precisely as expensive equipments.


glucose, paper-based biosensor, pencil-drawn electrode , smartphone based, electrochemical biosensor

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DOI: http://doi.org/10.11591/ijece.v7i3.pp1423-1429
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ISSN 2088-8708, e-ISSN 2722-2578